text:
Cargo stuck for hours, taking 100% of the CPU

While working on Servo, on a regular basis, Cargo gets stuck on Updating git repository or Updating registry.
I usually have to wait few hours until it finishes. Sometimes with no error (compilation went through). Sometimes with an error (conflict of version with a dependency in my Cargo.toml and Servo's Cargo.toml).
I guess https://github.com/rust-lang/cargo/issues/4502 is related.
Is there anything I can do to help diagnose this problem?

I don't know if it's easily reproducible, but cargo check freeze with this: https://github.com/paulrouget/cargo-issue-4604

By freeze, I mean, get stuck on Updating git repository https://github.com/servo/servo`.

After few hours (I think 3 or 4 hours), this is what the Cargo.lock looks like: https://gist.github.com/paulrouget/385dd3d86028c698c98776d8d198e61a
The difference is the move from a local checkout of servo, webrender and webrender_api to the github repo.

This is likely an unfortunate instance of https://github.com/rust-lang/cargo/issues/4066, although I'd have to dig in to be sure

This is likely an unfortunate instance of #4066, although I'd have to dig in to be sure

In this issue, you say:

We should have a hard limit for the number of steps the resolution algorithm can take before it just hard aborts and exits saying "this probably isn't gonna work".

But in this case, it works. But it takes 4 hours.

Is there any workaround?
Because every time I need to update servo in my projects, I have to run Cargo for hours before being able to do anything.

I don't think I understand what's going on enough to recommend a workaround or know how to fix it. If it's not #4066 then Cargo may just need a tweak to a heuristic or something like that. I do not have time to investigate right now, but I can try to get around to this soon.

Could this be a slow libgit operation? That is, https://github.com/rust-lang/cargo/issues/4261 ?

I tried to reproduce today with: https://github.com/rust-lang/cargo/issues/4604#issuecomment-335445382
But suddenly it's fast.
What changed since last week:

I have a faster connection
maybe the content of ~/.cargo/

This is still happening.
Stuck on:
    Updating git repository `https://github.com/servo/servo`
DEBUG:cargo::sources::git::utils: skipping gc as there's only 35 pack files
DEBUG:cargo::sources::git::utils: doing a fetch for https://github.com/servo/servo
DEBUG:cargo::sources::git::utils: initiating fetch of refs/heads/*:refs/heads/* from https://github.com/servo/servo
INFO:cargo::sources::git::utils: fetch /Users/paul/.cargo/git/checkouts/servo-12bfca331f128de3/43a4f01/.git/
DEBUG:cargo::sources::git::utils: skipping gc as there's only 3 pack files
DEBUG:cargo::sources::git::utils: doing a fetch for file:///Users/paul/.cargo/git/db/servo-12bfca331f128de3
DEBUG:cargo::sources::git::utils: initiating fetch of refs/heads/*:refs/heads/* from file:///Users/paul/.cargo/git/db/servo-12bfca331f128de3

Would it be possible to work around the issue by pulling manually?
I checkout-ed commit #43a4f01 in /Users/paul/.cargo/git/checkouts/servo-12bfca331f128de3/43a4f01/ - but still, it gets stuck exactly the same way.

I attached lldb to the process and dumped the backtrace:
https://gist.github.com/paulrouget/d6e3d62c5fd03af96b3338cf9414335d

@paulrouget it looks like it's stuck in libgit2 fetching? If that's the case I'm not sure how to debug... You could try out https://github.com/rust-lang/cargo/pull/4646 locally and perhaps see if progress is being made?

it looks like it's stuck in libgit2 fetching? If that's the case I'm not sure how to debug... You could try out #4646 locally and perhaps see if progress is being made?

Now this has landed, I see that it's progressing, but very very slowly. It's apparently stagnating at 1 minute per percent. The network monitor tells me it's downloading at 2 to 7 kb/s.

I can slow down a lot more. At the moment, it's around 7 minutes per percent.

Cargo runs at 100% CPU:
Sampling process 69849 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling cargo (pid 69849) every 1 millisecond
Process:         cargo [69849]
Path:            /Users/paul/.rustup/toolchains/nightly-2017-11-14-x86_64-apple-darwin/bin/cargo
Load Address:    0x1045db000
Identifier:      cargo
Version:         ???
Code Type:       X86-64
Parent Process:  zsh [56467]

Date/Time:       2017-11-20 09:40:10.881 +0100
Launch Time:     2017-11-20 09:06:51.981 +0100
OS Version:      Mac OS X 10.13.1 (17B48)
Report Version:  7
Analysis Tool:   /usr/bin/sample
----

Call graph:
    762 Thread_9195248   DispatchQueue_1: com.apple.main-thread  (serial)
    + 762 start  (in cargo) + 52  [0x1045dc534]
    +   762 std::rt::lang_start::hd17fc511099cc2be  (in cargo) + 473  [0x104c25359]
    +     762 __rust_maybe_catch_panic  (in cargo) + 31  [0x104c2ffaf]
    +       762 cargo::main::h00ac1893a40041f5 (.llvm.DDAB090)  (in cargo) + 626  [0x1045e63c2]
    +         762 cargo::call_main_without_stdin::h51bc164e5c018f18 (.llvm.DDAB090)  (in cargo) + 1201  [0x1045e6011]
    +           762 cargo::execute::hcadd50a5b690d4d1 (.llvm.DDAB090)  (in cargo) + 3534  [0x1045e73fe]
    +             762 cargo::try_execute_builtin_command::ha0cdea16837d876b (.llvm.DDAB090)  (in cargo) + 2795  [0x1045e9a9b]
    +               762 cargo::build::execute::h288c61376d08943c  (in cargo) + 2720  [0x1046680e0]
    +                 762 cargo::ops::cargo_compile::compile::h0e04118861fdfead  (in cargo) + 94  [0x1046bd16e]
    +                   762 cargo::ops::cargo_compile::compile_with_exec::h48102a75b25fa388  (in cargo) + 489  [0x1046bd399]
    +                     762 cargo::ops::cargo_compile::compile_ws::h362183f616478b73  (in cargo) + 1451  [0x1046bdb2b]
    +                       762 cargo::ops::resolve::resolve_ws_precisely::ha3147c4e1cae3ce9  (in cargo) + 306  [0x1048443b2]
    +                         762 cargo::ops::resolve::resolve_with_registry::hbd27a06b4a3aeeb1 (.llvm.8BFD5AB8)  (in cargo) + 185  [0x104845359]
    +                           762 cargo::ops::resolve::resolve_with_previous::h2a3063e187f8279d  (in cargo) + 2928  [0x104846000]
    +                             762 cargo::core::resolver::resolve::hb9241e575e3f330c  (in cargo) + 663  [0x104915087]
    +                               762 cargo::core::resolver::activate_deps_loop::h1c9b917e633f691e (.llvm.49F80D0A)  (in cargo) + 424  [0x1049197f8]
    +                                 762 cargo::core::resolver::activate::h9b54c9e97ea90d66 (.llvm.49F80D0A)  (in cargo) + 6573  [0x104917e6d]
    +                                   762 _$LT$alloc..vec..Vec$LT$T$GT$$u20$as$u20$alloc..vec..SpecExtend$LT$T$C$$u20$I$GT$$GT$::from_iter::ha7d3762405001311  (in cargo) + 260  [0x104801114]
    +                                     762 _$LT$$RF$$u27$a$u20$mut$u20$I$u20$as$u20$core..iter..iterator..Iterator$GT$::next::h0603f0c9e06f8681  (in cargo) + 157  [0x104943edd]
    +                                       762 core::ops::function::impls::_$LT$impl$u20$core..ops..function..FnOnce$LT$A$GT$$u20$for$u20$$RF$$u27$a$u20$mut$u20$F$GT$::call_once::h9a71a3d2e726f15a  (in cargo) + 178  [0x1048fd3b2]
    +                                         762 _$LT$cargo..core..registry..PackageRegistry$LT$$u27$cfg$GT$$u20$as$u20$cargo..core..registry..Registry$GT$::query::h58422b1647f378eb  (in cargo) + 986  [0x10475329a]
    +                                           762 cargo::core::registry::PackageRegistry::ensure_loaded::h58281be0daa82731 (.llvm.F4F82D07)  (in cargo) + 1073  [0x1047520f1]
    +                                             762 _$LT$cargo..sources..git..source..GitSource$LT$$u27$cfg$GT$$u20$as$u20$cargo..core..source..Source$GT$::update::h5a3668887b7bbe3d  (in cargo) + 2982  [0x10475d0d6]
    +                                               762 cargo::sources::git::utils::GitDatabase::copy_to::h403aebadb5a2e85a  (in cargo) + 1030  [0x104710bf6]
    +                                                 762 cargo::sources::git::utils::GitCheckout::fetch::hdfce2914df6f34c0 (.llvm.6EB81EBA)  (in cargo) + 351  [0x10471248f]
    +                                                   762 cargo::sources::git::utils::fetch::hca35fce51a94b5c9  (in cargo) + 4874  [0x10471593a]
    +                                                     762 cargo::sources::git::utils::fetch::_$u7b$$u7b$closure$u7d$$u7d$::ha4206e8f05580b27 (.llvm.6EB81EBA)  (in cargo) + 762  [0x10471820a]
    +                                                       762 cargo::util::network::with_retry::hb11a8d90dff3afbd  (in cargo) + 477  [0x10484b21d]
    +                                                         762 git2::remote::Remote::fetch::h21204a23dfef3975  (in cargo) + 651  [0x1049a66eb]
    +                                                           762 git_remote_fetch  (in cargo) + 196  [0x1049efac4]
    +                                                             762 git_remote_download  (in cargo) + 1170  [0x1049ef962]
    +                                                               762 local_download_pack  (in cargo) + 829  [0x104a046ed]
    +                                                                 762 write_pack  (in cargo) + 1079  [0x1049dee77]
    +                                                                   287 write_one  (in cargo) + 765  [0x1049e0a3d]
    +                                                                   ! 285 git_indexer_append  (in cargo) + 561  [0x1049d0221]
    +                                                                   ! : 285 git_mwindow_free_all  (in cargo) + 58  [0x1049d62ba]
    +                                                                   ! :   285 git_mwindow_free_all_locked  (in cargo) + 138  [0x1049d635a]
    +                                                                   ! :     285 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! :       285 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! 2 git_indexer_append  (in cargo) + 70  [0x1049d0036]
    +                                                                   !   2 append_to_pack  (in cargo) + 128  [0x1049d0a40]
    +                                                                   !     2 p_write  (in cargo) + 46  [0x1049e790e]
    +                                                                   !       2 write  (in libsystem_kernel.dylib) + 10  [0x7fff715e9b62]
    +                                                                   159 write_one  (in cargo) + 912  [0x1049e0ad0]
    +                                                                   ! 157 git_indexer_append  (in cargo) + 561  [0x1049d0221]
    +                                                                   ! : 157 git_mwindow_free_all  (in cargo) + 58  [0x1049d62ba]
    +                                                                   ! :   157 git_mwindow_free_all_locked  (in cargo) + 138  [0x1049d635a]
    +                                                                   ! :     157 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! :       157 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! 1 git_indexer_append  (in cargo) + 1072  [0x1049d0420]
    +                                                                   ! : 1 git_packfile_stream_read  (in cargo) + 155  [0x1049e21eb]
    +                                                                   ! :   1 git_mwindow_open  (in cargo) + 441  [0x1049d6539]
    +                                                                   ! :     1 p_mmap  (in cargo) + 61  [0x104a109bd]
    +                                                                   ! :       1 mmap  (in libsystem_kernel.dylib) + 92  [0x7fff715e389a]
    +                                                                   ! :         1 __mmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7b32]
    +                                                                   ! 1 git_indexer_append  (in cargo) + 1643  [0x1049d065b]
    +                                                                   !   1 git2::remote_callbacks::transfer_progress_cb::he07b0955c831f978 (.llvm.3E34B4F1)  (in cargo) + 49  [0x1049a0131]
    +                                                                   !     1 cargo::sources::git::utils::fetch::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::hc046d48fc0f2b9c2 (.llvm.E13DF95F)  (in cargo) + 62  [0x1047e5ade]
    +                                                                   !       1 cargo::util::progress::Progress::tick::h16581f53cee437bd  (in cargo) + 801  [0x10471f2d1]
    +                                                                   !         1 _$LT$alloc..raw_vec..RawVec$LT$T$C$$u20$A$GT$$GT$::reserve::hc84c6756c8a0e317  (in cargo) + 79  [0x1048dc15f]
    +                                                                   !           1 __rde_realloc  (in cargo) + 81  [0x104c301f1]
    +                                                                   !             1 je_rallocx  (in cargo) + 937  [0x104c33d89]
    +                                                                   !               1 je_arena_ralloc  (in cargo) + 832  [0x104c3d1d0]
    +                                                                   !                 1 _platform_memmove$VARIANT$Haswell  (in libsystem_platform.dylib) + 183  [0x7fff7171bfd7]
    +                                                                   157 write_one  (in cargo) + 835  [0x1049e0a83]
    +                                                                   ! 155 git_indexer_append  (in cargo) + 70  [0x1049d0036]
    +                                                                   ! : 151 append_to_pack  (in cargo) + 233  [0x1049d0aa9]
    +                                                                   ! : | 151 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! : |   151 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! : 4 append_to_pack  (in cargo) + 128  [0x1049d0a40]
    +                                                                   ! :   4 p_write  (in cargo) + 46  [0x1049e790e]
    +                                                                   ! :     4 write  (in libsystem_kernel.dylib) + 10  [0x7fff715e9b62]
    +                                                                   ! 1 git_indexer_append  (in cargo) + 117  [0x1049d0065]
    +                                                                   ! : 1 hash_partially  (in cargo) + 67  [0x1049d0b23]
    +                                                                   ! :   1 CC_SHA1_Update  (in libcommonCrypto.dylib) + 176  [0x7fff7133a8a0]
    +                                                                   ! 1 git_indexer_append  (in cargo) + 723  [0x1049d02c3]
    +                                                                   !   1 git_packfile_unpack_header  (in cargo) + 52  [0x1049e0e24]
    +                                                                   !     1 git_mwindow_open  (in cargo) + 441  [0x1049d6539]
    +                                                                   !       1 p_mmap  (in cargo) + 61  [0x104a109bd]
    +                                                                   !         1 mmap  (in libsystem_kernel.dylib) + 92  [0x7fff715e389a]
    +                                                                   !           1 __mmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7b32]
    +                                                                   144 write_one  (in cargo) + 1075  [0x1049e0b73]
    +                                                                   ! 140 git_indexer_append  (in cargo) + 70  [0x1049d0036]
    +                                                                   ! : 139 append_to_pack  (in cargo) + 233  [0x1049d0aa9]
    +                                                                   ! : | 139 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! : |   139 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! : 1 append_to_pack  (in cargo) + 128  [0x1049d0a40]
    +                                                                   ! :   1 p_write  (in cargo) + 46  [0x1049e790e]
    +                                                                   ! :     1 write  (in libsystem_kernel.dylib) + 10  [0x7fff715e9b62]
    +                                                                   ! 3 git_indexer_append  (in cargo) + 561  [0x1049d0221]
    +                                                                   ! : 3 git_mwindow_free_all  (in cargo) + 58  [0x1049d62ba]
    +                                                                   ! :   3 git_mwindow_free_all_locked  (in cargo) + 138  [0x1049d635a]
    +                                                                   ! :     3 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! :       3 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! 1 git_indexer_append  (in cargo) + 1643  [0x1049d065b]
    +                                                                   !   1 git2::remote_callbacks::transfer_progress_cb::he07b0955c831f978 (.llvm.3E34B4F1)  (in cargo) + 49  [0x1049a0131]
    +                                                                   !     1 cargo::sources::git::utils::fetch::_$u7b$$u7b$closure$u7d$$u7d$::_$u7b$$u7b$closure$u7d$$u7d$::hc046d48fc0f2b9c2 (.llvm.E13DF95F)  (in cargo) + 62  [0x1047e5ade]
    +                                                                   !       1 cargo::util::progress::Progress::tick::h16581f53cee437bd  (in cargo) + 1023  [0x10471f3af]
    +                                                                   !         1 cargo::core::shell::Shell::print::ha1b950463d43512e  (in cargo) + 105  [0x104730809]
    +                                                                   !           1 _$LT$termcolor..StandardStream$u20$as$u20$termcolor..WriteColor$GT$::reset::hcdc1cf6ce0452e54  (in cargo) + 39  [0x104a22b47]
    +                                                                   !             1 _$LT$termcolor..Ansi$LT$W$GT$$GT$::write_str::h9636618a3486e2e9 (.llvm.BBB77D41)  (in cargo) + 117  [0x104a22bd5]
    +                                                                   !               1 _$LT$std..io..stdio..Stderr$u20$as$u20$std..io..Write$GT$::write::h8e5a78b66d5b22b5  (in cargo) + 38  [0x104c129d6]
    +                                                                   14 write_one  (in cargo) + 106  [0x1049e07aa]
    +                                                                   ! 8 write_one  (in cargo) + 106  [0x1049e07aa]
    +                                                                   ! : 4 write_one  (in cargo) + 106  [0x1049e07aa]
    +                                                                   ! : | 2 write_one  (in cargo) + 912  [0x1049e0ad0]
    +                                                                   ! : | + 2 git_indexer_append  (in cargo) + 561  [0x1049d0221]
    +                                                                   ! : | +   2 git_mwindow_free_all  (in cargo) + 58  [0x1049d62ba]
    +                                                                   ! : | +     2 git_mwindow_free_all_locked  (in cargo) + 138  [0x1049d635a]
    +                                                                   ! : | +       2 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! : | +         2 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! : | 1 write_one  (in cargo) + 765  [0x1049e0a3d]
    +                                                                   ! : | + 1 git_indexer_append  (in cargo) + 561  [0x1049d0221]
    +                                                                   ! : | +   1 git_mwindow_free_all  (in cargo) + 58  [0x1049d62ba]
    +                                                                   ! : | +     1 git_mwindow_free_all_locked  (in cargo) + 138  [0x1049d635a]
    +                                                                   ! : | +       1 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! : | +         1 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! : | 1 write_one  (in cargo) + 835  [0x1049e0a83]
    +                                                                   ! : |   1 git_indexer_append  (in cargo) + 70  [0x1049d0036]
    +                                                                   ! : |     1 append_to_pack  (in cargo) + 233  [0x1049d0aa9]
    +                                                                   ! : |       1 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! : |         1 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! : 2 write_one  (in cargo) + 912  [0x1049e0ad0]
    +                                                                   ! : | 2 git_indexer_append  (in cargo) + 561  [0x1049d0221]
    +                                                                   ! : |   2 git_mwindow_free_all  (in cargo) + 58  [0x1049d62ba]
    +                                                                   ! : |     2 git_mwindow_free_all_locked  (in cargo) + 138  [0x1049d635a]
    +                                                                   ! : |       2 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! : |         2 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! : 1 write_one  (in cargo) + 765  [0x1049e0a3d]
    +                                                                   ! : | 1 git_indexer_append  (in cargo) + 561  [0x1049d0221]
    +                                                                   ! : |   1 git_mwindow_free_all  (in cargo) + 58  [0x1049d62ba]
    +                                                                   ! : |     1 git_mwindow_free_all_locked  (in cargo) + 138  [0x1049d635a]
    +                                                                   ! : |       1 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! : |         1 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! : 1 write_one  (in cargo) + 835  [0x1049e0a83]
    +                                                                   ! :   1 git_indexer_append  (in cargo) + 70  [0x1049d0036]
    +                                                                   ! :     1 append_to_pack  (in cargo) + 233  [0x1049d0aa9]
    +                                                                   ! :       1 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! :         1 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! 3 write_one  (in cargo) + 835  [0x1049e0a83]
    +                                                                   ! : 3 git_indexer_append  (in cargo) + 70  [0x1049d0036]
    +                                                                   ! :   3 append_to_pack  (in cargo) + 233  [0x1049d0aa9]
    +                                                                   ! :     3 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! :       3 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! 2 write_one  (in cargo) + 765  [0x1049e0a3d]
    +                                                                   ! : 2 git_indexer_append  (in cargo) + 561  [0x1049d0221]
    +                                                                   ! :   2 git_mwindow_free_all  (in cargo) + 58  [0x1049d62ba]
    +                                                                   ! :     2 git_mwindow_free_all_locked  (in cargo) + 138  [0x1049d635a]
    +                                                                   ! :       2 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   ! :         2 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   ! 1 write_one  (in cargo) + 912  [0x1049e0ad0]
    +                                                                   !   1 git_indexer_append  (in cargo) + 561  [0x1049d0221]
    +                                                                   !     1 git_mwindow_free_all  (in cargo) + 58  [0x1049d62ba]
    +                                                                   !       1 git_mwindow_free_all_locked  (in cargo) + 138  [0x1049d635a]
    +                                                                   !         1 p_munmap  (in cargo) + 19  [0x104a10a13]
    +                                                                   !           1 __munmap  (in libsystem_kernel.dylib) + 10  [0x7fff715e7bf2]
    +                                                                   1 write_one  (in cargo) + 810  [0x1049e0a6a]
    +                                                                     1 CC_SHA1_Update  (in libcommonCrypto.dylib) + 103  [0x7fff7133a857]
    +                                                                       1 _platform_memmove$VARIANT$Haswell  (in libsystem_platform.dylib) + 77  [0x7fff7171bf6d]
    762 Thread_9195306
      762 start_wqthread  (in libsystem_pthread.dylib) + 13  [0x7fff71721c4d]
        762 _pthread_wqthread  (in libsystem_pthread.dylib) + 1552  [0x7fff7172226f]
          762 __workq_kernreturn  (in libsystem_kernel.dylib) + 10  [0x7fff715e86da]

Total number in stack (recursive counted multiple, when >=5):
        14       __munmap  (in libsystem_kernel.dylib) + 0  [0x7fff715e7be8]
        14       p_munmap  (in cargo) + 19  [0x104a10a13]
        9       git_indexer_append  (in cargo) + 561  [0x1049d0221]
        9       git_mwindow_free_all  (in cargo) + 58  [0x1049d62ba]
        9       git_mwindow_free_all_locked  (in cargo) + 138  [0x1049d635a]
        6       git_indexer_append  (in cargo) + 70  [0x1049d0036]
        5       append_to_pack  (in cargo) + 233  [0x1049d0aa9]

Sort by top of stack, same collapsed (when >= 5):
        __workq_kernreturn  (in libsystem_kernel.dylib)        762
        __munmap  (in libsystem_kernel.dylib)        749
        write  (in libsystem_kernel.dylib)        7

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    0x7fff59b83000 -     0x7fff59bcbfff  com.apple.AppleJPEG (1.0 - 1) <DCAB2588-8879-3A64-87EA-EAA770BA1ADB> /System/Library/PrivateFrameworks/AppleJPEG.framework/Versions/A/AppleJPEG
    0x7fff59bfd000 -     0x7fff59c05ff3  com.apple.AppleSRP (5.0 - 1) <4CEC34CF-63E3-3023-B61B-F8D133698534> /System/Library/PrivateFrameworks/AppleSRP.framework/Versions/A/AppleSRP
    0x7fff59c06000 -     0x7fff59c2efff  com.apple.applesauce (1.0 - ???) <32FF4851-2F68-35BA-835F-91856A20C323> /System/Library/PrivateFrameworks/AppleSauce.framework/Versions/A/AppleSauce
    0x7fff5a3ed000 -     0x7fff5a3f4ff7  com.apple.coreservices.BackgroundTaskManagement (1.0 - 57.1) <7F54A7A8-3667-3071-9DE6-2D915C63F70C> /System/Library/PrivateFrameworks/BackgroundTaskManagement.framework/Versions/A/BackgroundTaskManagement
    0x7fff5bdd5000 -     0x7fff5bddeffb  com.apple.CommonAuth (4.0 - 2.0) <F9A7C82E-197F-382E-B854-3DCE83FD6DA3> /System/Library/PrivateFrameworks/CommonAuth.framework/Versions/A/CommonAuth
    0x7fff5c677000 -     0x7fff5c680ff7  com.apple.frameworks.CoreDaemon (1.3 - 1.3) <0A87A91C-A2CF-3BB1-9038-7F610111BC30> /System/Library/PrivateFrameworks/CoreDaemon.framework/Versions/B/CoreDaemon
    0x7fff5c7e4000 -     0x7fff5c7f4ff7  com.apple.CoreEmoji (1.0 - 69.2.4) <7FB592BF-FAA2-3290-8B04-28BCEA49F519> /System/Library/PrivateFrameworks/CoreEmoji.framework/Versions/A/CoreEmoji
    0x7fff5dea9000 -     0x7fff5deadffb  com.apple.DSExternalDisplay (3.1 - 380) <BEC07C7C-F3AC-3CF3-B13E-3EBFD6224C0D> /System/Library/PrivateFrameworks/DSExternalDisplay.framework/Versions/A/DSExternalDisplay
    0x7fff5eebf000 -     0x7fff5f2edfff  com.apple.vision.FaceCore (3.3.2 - 3.3.2) <80C97AD7-D5C2-311A-B268-4AA60CAD6CED> /System/Library/PrivateFrameworks/FaceCore.framework/Versions/A/FaceCore
    0x7fff632ed000 -     0x7fff632fcfff  com.apple.GraphVisualizer (1.0 - 5) <0A93C5DE-0D28-312E-8764-6B0FB805ED91> /System/Library/PrivateFrameworks/GraphVisualizer.framework/Versions/A/GraphVisualizer
    0x7fff63374000 -     0x7fff633e8fff  com.apple.Heimdal (4.0 - 2.0) <600A9BD5-3DD2-3F7C-B40E-8485026FE936> /System/Library/PrivateFrameworks/Heimdal.framework/Versions/A/Heimdal
    0x7fff63c89000 -     0x7fff63c90ffb  com.apple.IOAccelerator (374.1 - 374.1) <DD7ACD4F-F908-3ED8-A144-4091AA3C85BE> /System/Library/PrivateFrameworks/IOAccelerator.framework/Versions/A/IOAccelerator
    0x7fff63c94000 -     0x7fff63caaff7  com.apple.IOPresentment (1.0 - 32.1) <23542804-9605-3458-9468-22B0DE738E21> /System/Library/PrivateFrameworks/IOPresentment.framework/Versions/A/IOPresentment
    0x7fff64320000 -     0x7fff64415fff  com.apple.LanguageModeling (1.0 - 159.2.1) <CC4069FF-BF5C-30F5-98F5-D6F746C5AA04> /System/Library/PrivateFrameworks/LanguageModeling.framework/Versions/A/LanguageModeling
    0x7fff64416000 -     0x7fff64458ff7  com.apple.Lexicon-framework (1.0 - 33.2) <5CC5E8EE-62A1-3EA5-B300-A39ABD0CF12D> /System/Library/PrivateFrameworks/Lexicon.framework/Versions/A/Lexicon
    0x7fff6445c000 -     0x7fff64463ff7  com.apple.LinguisticData (1.0 - 238.2.2) <0C53E8E4-5BB6-377E-BD74-DDC3B548D699> /System/Library/PrivateFrameworks/LinguisticData.framework/Versions/A/LinguisticData
    0x7fff6503e000 -     0x7fff650a5ff7  com.apple.gpusw.MetalTools (1.0 - 1) <A9C560B2-2830-3CC3-8069-128F8D7B8B85> /System/Library/PrivateFrameworks/MetalTools.framework/Versions/A/MetalTools
    0x7fff652bb000 -     0x7fff652e3ff7  com.apple.MultitouchSupport.framework (1004.1 - 1004.1) <69BF94F5-9301-3755-98A1-A981DB03C395> /System/Library/PrivateFrameworks/MultitouchSupport.framework/Versions/A/MultitouchSupport
    0x7fff65547000 -     0x7fff65552fff  com.apple.NetAuth (6.2 - 6.2) <5C6F492A-28EF-3A0E-B573-6F3D60CFF0C7> /System/Library/PrivateFrameworks/NetAuth.framework/Versions/A/NetAuth
    0x7fff6b48b000 -     0x7fff6b723fff  com.apple.SkyLight (1.600.0 - 312.11) <75F0EBAD-AF87-3125-B5D0-752278352FEC> /System/Library/PrivateFrameworks/SkyLight.framework/Versions/A/SkyLight
    0x7fff6cfd9000 -     0x7fff6cfe0ff3  com.apple.TCC (1.0 - 1) <9E54D9D2-FCBE-39EF-BAD5-4C2C41DA0D36> /System/Library/PrivateFrameworks/TCC.framework/Versions/A/TCC
    0x7fff6d34c000 -     0x7fff6d34dfff  com.apple.TrustEvaluationAgent (2.0 - 31) <39F533B2-211E-3635-AF47-23F27749FF4A> /System/Library/PrivateFrameworks/TrustEvaluationAgent.framework/Versions/A/TrustEvaluationAgent
    0x7fff6ec25000 -     0x7fff6ec27ffb  com.apple.loginsupport (1.0 - 1) <5E2C4AA7-066D-3FDB-B0E1-4CDAF287392C> /System/Library/PrivateFrameworks/login.framework/Versions/A/Frameworks/loginsupport.framework/Versions/A/loginsupport
    0x7fff6ed8b000 -     0x7fff6edbefff  libclosured.dylib (519.2.1) <31A6AC03-8F51-367E-9E00-FF0F1AD10F6F> /usr/lib/closure/libclosured.dylib
    0x7fff6ee5d000 -     0x7fff6ee96ff7  libCRFSuite.dylib (41) <AB2DA745-F22C-30CF-81D4-35DD716463B8> /usr/lib/libCRFSuite.dylib
    0x7fff6ee97000 -     0x7fff6eea2fff  libChineseTokenizer.dylib (28) <D30A7DB6-058F-3286-9583-60C9EEB77A6E> /usr/lib/libChineseTokenizer.dylib
    0x7fff6ef34000 -     0x7fff6ef35ff3  libDiagnosticMessagesClient.dylib (104) <9712E980-76EE-3A89-AEA6-DF4BAF5C0574> /usr/lib/libDiagnosticMessagesClient.dylib
    0x7fff6ef6c000 -     0x7fff6f136ff3  libFosl_dynamic.dylib (17.7) <B2476843-7FA7-3E62-B79F-2B15FE557E63> /usr/lib/libFosl_dynamic.dylib
    0x7fff6f16e000 -     0x7fff6f16efff  libOpenScriptingUtil.dylib (174) <203D2C39-61BB-3713-A502-2D17B04A42AC> /usr/lib/libOpenScriptingUtil.dylib
    0x7fff6f29d000 -     0x7fff6f29eff3  libSystem.B.dylib (1252) <C5473FF4-E5A9-31D3-83F9-094D8A76C31F> /usr/lib/libSystem.B.dylib
    0x7fff6f331000 -     0x7fff6f331fff  libapple_crypto.dylib (109.20.5) <71AE014E-4C98-3868-9EE8-2A3F23536B41> /usr/lib/libapple_crypto.dylib
    0x7fff6f332000 -     0x7fff6f348ff7  libapple_nghttp2.dylib (1.24) <01402BC4-4822-3676-9C80-50D83F816424> /usr/lib/libapple_nghttp2.dylib
    0x7fff6f349000 -     0x7fff6f373ff3  libarchive.2.dylib (54) <8FC28DD8-E315-3C3E-95FE-D1D2CBE49888> /usr/lib/libarchive.2.dylib
    0x7fff6f3f9000 -     0x7fff6f3f9ff3  libauto.dylib (187) <A05C7900-F8C7-3E75-8D3F-909B40C19717> /usr/lib/libauto.dylib
    0x7fff6f3fa000 -     0x7fff6f4aeff7  libboringssl.dylib (109.20.5) <A1CC732C-B0AC-35FA-8DE0-03CF4BA67F5A> /usr/lib/libboringssl.dylib
    0x7fff6f4af000 -     0x7fff6f4bfff3  libbsm.0.dylib (39) <770B341F-3BB7-3123-B53C-F2D58868A963> /usr/lib/libbsm.0.dylib
    0x7fff6f4c0000 -     0x7fff6f4cdffb  libbz2.1.0.dylib (38) <0A5086BB-4724-3C14-979D-5AD4F26B5B45> /usr/lib/libbz2.1.0.dylib
    0x7fff6f4ce000 -     0x7fff6f524fff  libc++.1.dylib (400.9) <FCF5E1F6-2B04-3545-8004-F3AB32FED172> /usr/lib/libc++.1.dylib
    0x7fff6f525000 -     0x7fff6f549ff7  libc++abi.dylib (400.7) <217656D5-BC40-37FF-B322-91CB2AAD4F34> /usr/lib/libc++abi.dylib
    0x7fff6f54b000 -     0x7fff6f55bfff  libcmph.dylib (6) <A5509EE8-7E00-3224-8814-015B077A3CF5> /usr/lib/libcmph.dylib
    0x7fff6f55c000 -     0x7fff6f572fff  libcompression.dylib (47) <E64D4416-DFBF-314B-BBB9-BED23C3A251C> /usr/lib/libcompression.dylib
    0x7fff6f81a000 -     0x7fff6f832ff7  libcoretls.dylib (155) <DFE2454F-2FE3-3B2B-A22B-422947C34C69> /usr/lib/libcoretls.dylib
    0x7fff6f833000 -     0x7fff6f834ffb  libcoretls_cfhelpers.dylib (155) <D3F4B882-40C1-3CD4-927B-0E0ED6031D0B> /usr/lib/libcoretls_cfhelpers.dylib
    0x7fff6f9cd000 -     0x7fff6fb5dfff  libcrypto.35.dylib (22) <067CFC21-249D-392D-ADE1-785100BF0F83> /usr/lib/libcrypto.35.dylib
    0x7fff6fd04000 -     0x7fff6fd5aff3  libcups.2.dylib (462.1) <4F4F85FD-D907-3D51-A3F0-2A239E165A07> /usr/lib/libcups.2.dylib
    0x7fff6fd85000 -     0x7fff6fdd9ffb  libcurl.4.dylib (105.20.2) <FF16E64B-42B5-3BC2-A2A3-D63177560F4B> /usr/lib/libcurl.4.dylib
    0x7fff6fe98000 -     0x7fff6fe98fff  libenergytrace.dylib (16) <A92AB8B8-B986-3CE6-980D-D55090FEF387> /usr/lib/libenergytrace.dylib
    0x7fff6fecf000 -     0x7fff6fed4ffb  libheimdal-asn1.dylib (520) <D968FE68-7770-3AEA-BFEB-3F7F4CB10DDC> /usr/lib/libheimdal-asn1.dylib
    0x7fff6ff00000 -     0x7fff6fff1ff7  libiconv.2.dylib (51) <0772997F-4109-38A1-91ED-0F3F16AE99E5> /usr/lib/libiconv.2.dylib
    0x7fff6fff2000 -     0x7fff70219ffb  libicucore.A.dylib (59131.0.1) <3EA7567C-0A0C-3052-BC3C-DDB05A5679A7> /usr/lib/libicucore.A.dylib
    0x7fff70266000 -     0x7fff70267fff  liblangid.dylib (128) <39C39393-0D05-301D-93B2-F224FC4949AA> /usr/lib/liblangid.dylib
    0x7fff70268000 -     0x7fff70281ffb  liblzma.5.dylib (10) <3D419A50-961F-37D2-8A01-3DC7AB7B8D18> /usr/lib/liblzma.5.dylib
    0x7fff70282000 -     0x7fff70298ff7  libmarisa.dylib (9) <D6D2D55D-1D2E-3442-B152-B18803C0ABB4> /usr/lib/libmarisa.dylib
    0x7fff70349000 -     0x7fff70571ff7  libmecabra.dylib (779.5.3) <1F81DB66-4EEE-3B14-BA15-4930546C94D4> /usr/lib/libmecabra.dylib
    0x7fff70749000 -     0x7fff7081fff7  libnetwork.dylib (1229.21.1) <9998359C-3A37-3ED0-8CFC-C095C99F2102> /usr/lib/libnetwork.dylib
    0x7fff70895000 -     0x7fff70c837e7  libobjc.A.dylib (723) <93A92316-DE1E-378C-8891-99720B50D075> /usr/lib/libobjc.A.dylib
    0x7fff70c96000 -     0x7fff70c9afff  libpam.2.dylib (22) <7B4D2CE2-1438-387A-9802-5CEEFBF26F86> /usr/lib/libpam.2.dylib
    0x7fff70c9d000 -     0x7fff70cd1fff  libpcap.A.dylib (79.20.1) <FA13918B-A247-3181-B256-9B852C7BA316> /usr/lib/libpcap.A.dylib
    0x7fff70d51000 -     0x7fff70d6dffb  libresolv.9.dylib (65) <E8F3415B-4472-3202-8901-41FD87981DB2> /usr/lib/libresolv.9.dylib
    0x7fff70da8000 -     0x7fff70dbafff  libsasl2.2.dylib (211) <D9E281A2-D7BA-32CD-8B96-54972B1D9E66> /usr/lib/libsasl2.2.dylib
    0x7fff70dbd000 -     0x7fff70f52fef  libsqlite3.dylib (274.1) <075468C1-75CE-318F-9E9B-F62B6A88E1B3> /usr/lib/libsqlite3.dylib
    0x7fff70fae000 -     0x7fff71001ffb  libssl.35.dylib (22) <4D77B502-E065-3794-90E7-39E83F9683F6> /usr/lib/libssl.35.dylib
    0x7fff71122000 -     0x7fff7115bffb  libusrtcp.dylib (1229.21.1) <ED5D440E-6BE6-3AF3-817B-4D0BA2E53EDE> /usr/lib/libusrtcp.dylib
    0x7fff7115c000 -     0x7fff7115fffb  libutil.dylib (51.20.1) <216D18E5-0BAF-3EAF-A38E-F6AC37CBABD9> /usr/lib/libutil.dylib
    0x7fff71160000 -     0x7fff7116dfff  libxar.1.dylib (400) <0316128D-3B47-3052-995D-97B4FE5491DC> /usr/lib/libxar.1.dylib
    0x7fff71171000 -     0x7fff71258fff  libxml2.2.dylib (31.7) <49544596-BCF8-3765-8DC5-DB1A9A90EF92> /usr/lib/libxml2.2.dylib
    0x7fff71259000 -     0x7fff71281fff  libxslt.1.dylib (15.10) <66682AF6-C2D5-374C-901F-25A3E72814DC> /usr/lib/libxslt.1.dylib
    0x7fff71282000 -     0x7fff71294ffb  libz.1.dylib (70) <48C67CFC-940D-3857-8DAD-857774605352> /usr/lib/libz.1.dylib
    0x7fff71331000 -     0x7fff71335ff7  libcache.dylib (80) <354F3B7D-404E-3398-9EBF-65CA2CE65211> /usr/lib/system/libcache.dylib
    0x7fff71336000 -     0x7fff71340ff3  libcommonCrypto.dylib (60118.1.1) <6C502A55-3B54-3B48-BA7B-FA39F56C0B1E> /usr/lib/system/libcommonCrypto.dylib
    0x7fff71341000 -     0x7fff71348fff  libcompiler_rt.dylib (62) <4487CFBA-A5D7-3282-9E6B-94CAD7BE507E> /usr/lib/system/libcompiler_rt.dylib
    0x7fff71349000 -     0x7fff71351fff  libcopyfile.dylib (146) <7E4BD264-5617-339B-AC73-E8D07EF2C51D> /usr/lib/system/libcopyfile.dylib
    0x7fff71352000 -     0x7fff713d6ff7  libcorecrypto.dylib (562) <7974762C-DEF7-3056-9856-9821C27846DB> /usr/lib/system/libcorecrypto.dylib
    0x7fff7145d000 -     0x7fff71496ff7  libdispatch.dylib (913.20.5) <389EBBCD-3AA2-3340-AA48-4FBF621401BD> /usr/lib/system/libdispatch.dylib
    0x7fff71497000 -     0x7fff714b4ff7  libdyld.dylib (519.2.1) <2597D818-42D2-3375-BD9D-451D5942A6BA> /usr/lib/system/libdyld.dylib
    0x7fff714b5000 -     0x7fff714b5ffb  libkeymgr.dylib (28) <6D84A96F-C65B-38EC-BDB5-21FD2C97E7B2> /usr/lib/system/libkeymgr.dylib
    0x7fff714b6000 -     0x7fff714c2ff3  libkxld.dylib (4570.20.62) <E82BC0F8-C51D-3BB2-A0EB-B7899CD6606C> /usr/lib/system/libkxld.dylib
    0x7fff714c3000 -     0x7fff714c3ff7  liblaunch.dylib (1205.20.31) <0089D38D-868D-3748-A032-934AAE679F0D> /usr/lib/system/liblaunch.dylib
    0x7fff714c4000 -     0x7fff714c8ffb  libmacho.dylib (900.0.1) <756F2553-07B6-3B42-ACEA-2F0F1A5E8D0F> /usr/lib/system/libmacho.dylib
    0x7fff714c9000 -     0x7fff714cbff3  libquarantine.dylib (86) <6AC8773F-3817-3D82-99C2-01BABB9C3CBB> /usr/lib/system/libquarantine.dylib
    0x7fff714cc000 -     0x7fff714cdff3  libremovefile.dylib (45) <912FA211-DD8C-3C92-8424-21B89F8B10FD> /usr/lib/system/libremovefile.dylib
    0x7fff714ce000 -     0x7fff714e5fff  libsystem_asl.dylib (356.1.1) <94972913-9DF0-3C78-847C-43E58919E3DA> /usr/lib/system/libsystem_asl.dylib
    0x7fff714e6000 -     0x7fff714e6fff  libsystem_blocks.dylib (67) <F2493BB5-B1C6-3C4D-9F1F-1B402E0F1DB7> /usr/lib/system/libsystem_blocks.dylib
    0x7fff714e7000 -     0x7fff71570ff7  libsystem_c.dylib (1244.20.1) <E0A0A865-AFE5-3230-B535-772D3177D093> /usr/lib/system/libsystem_c.dylib
    0x7fff71571000 -     0x7fff71574ffb  libsystem_configuration.dylib (963) <D7EFEAE6-22A0-348E-BBBE-44FFD41934FA> /usr/lib/system/libsystem_configuration.dylib
    0x7fff71575000 -     0x7fff71578ffb  libsystem_coreservices.dylib (51) <21A488D0-2D07-344E-8631-CC8B2A246F35> /usr/lib/system/libsystem_coreservices.dylib
    0x7fff71579000 -     0x7fff7157afff  libsystem_darwin.dylib (1244.20.1) <4E340966-7DE7-38C4-8408-3708E592C21D> /usr/lib/system/libsystem_darwin.dylib
    0x7fff7157b000 -     0x7fff71581ff7  libsystem_dnssd.dylib (878.20.3) <AB5B8E5E-75CD-3695-B89B-77DF73E3EDB1> /usr/lib/system/libsystem_dnssd.dylib
    0x7fff71582000 -     0x7fff715cbff7  libsystem_info.dylib (517) <483BE95B-62EB-3663-ACB3-9915A40C70F5> /usr/lib/system/libsystem_info.dylib
    0x7fff715cc000 -     0x7fff715f1ff7  libsystem_kernel.dylib (4570.20.62) <77865ABA-D9CA-31D5-B484-560660CAB07D> /usr/lib/system/libsystem_kernel.dylib
    0x7fff715f2000 -     0x7fff7163dfcb  libsystem_m.dylib (3146) <ABB1B85F-9FFE-31B8-AD4F-E39A30794A93> /usr/lib/system/libsystem_m.dylib
    0x7fff7163e000 -     0x7fff7165dfff  libsystem_malloc.dylib (140.1.1) <9F0745FF-B92F-330D-8812-BB74001D1D33> /usr/lib/system/libsystem_malloc.dylib
    0x7fff7165e000 -     0x7fff71701ff3  libsystem_network.dylib (1229.21.1) <ECB15E1D-5D02-3B79-9C64-64BAAC808278> /usr/lib/system/libsystem_network.dylib
    0x7fff71702000 -     0x7fff7170cffb  libsystem_networkextension.dylib (767.20.1) <27F139B6-3250-345D-8495-7C22A00BC488> /usr/lib/system/libsystem_networkextension.dylib
    0x7fff7170d000 -     0x7fff71716ff3  libsystem_notify.dylib (172) <98EA3D62-7C86-30DE-8261-D020D2F1EFF3> /usr/lib/system/libsystem_notify.dylib
    0x7fff71717000 -     0x7fff7171eff7  libsystem_platform.dylib (161.20.1) <9090E7AA-5F8F-31BA-8476-7B7122CC82BC> /usr/lib/system/libsystem_platform.dylib
    0x7fff7171f000 -     0x7fff7172afff  libsystem_pthread.dylib (301.20.1) <8AF70211-A670-3CC7-AE24-EFE9F1C2B1E5> /usr/lib/system/libsystem_pthread.dylib
    0x7fff7172b000 -     0x7fff7172eff3  libsystem_sandbox.dylib (765.21.1) <FAC0DA75-892E-3161-9D6A-2F999D8519B6> /usr/lib/system/libsystem_sandbox.dylib
    0x7fff7172f000 -     0x7fff71730ff3  libsystem_secinit.dylib (30) <F06ADB8F-9E94-34A7-B3C9-2C22FDD14BAD> /usr/lib/system/libsystem_secinit.dylib
    0x7fff71731000 -     0x7fff71738ff7  libsystem_symptoms.dylib (820.20.3) <4439B818-4C84-30E9-91B5-B7766FA74650> /usr/lib/system/libsystem_symptoms.dylib
    0x7fff71739000 -     0x7fff7174cff7  libsystem_trace.dylib (829.20.1) <878582CE-0647-31DD-92C3-AFCD5C3A714D> /usr/lib/system/libsystem_trace.dylib
    0x7fff7174e000 -     0x7fff71753ff7  libunwind.dylib (35.3) <6D4FCD49-D2A9-3233-95C7-A7635CE265F2> /usr/lib/system/libunwind.dylib
    0x7fff71754000 -     0x7fff71780ff7  libxpc.dylib (1205.20.31) <58676E88-35FD-3CF3-99BB-2A82E09F8058> /usr/lib/system/libxpc.dylib
Sample analysis of process 69849 written to file /dev/stdout

Most of time spent in this if I read the samples right:
> write_one
  > git_indexer_append
    > git_mwindow_free_all
      > git_mwindow_free_all_locked
        > p_munmap > __munmap

Ok well at least we know it's stuck in libgit2! Do you know the URL of what it's cloning? If you can create a standalone program using just git2-rs that clones it will probably be sufficient for opening a bug against libgit2

Does Cargo use https://github.com/alexcrichton/git2-rs?
If so, cargo run --example fetch https://github.com/servo/servo.git works as expected.

Yes Cargo uses git2-rs, but Cargo likely doesn't match the exact behavior of one of the examples, but rather something may need to be extracted from Cargo's source to match its patterns.

The same issue with: cargo 1.31.0-nightly (ad6e5c003 2018-09-28) and rustc 1.31.0-nightly (2c2e2c57d 2018-10-12) on MacOSX 10.14 (18A391).
Sampling process 26026 for 3 seconds with 1 millisecond of run time between samples
Sampling completed, processing symbols...
Analysis of sampling cargo (pid 26026) every 1 millisecond
Process:         cargo [26026]
Path:            /Users/shenshouer/.rustup/toolchains/nightly-x86_64-apple-darwin/bin/cargo
Load Address:    0x102da9000
Identifier:      cargo
Version:         ???
Code Type:       X86-64
Parent Process:  clion [25877]
Date/Time:       2018-10-30 23:26:17.142 +0800
Launch Time:     2018-10-30 23:12:55.183 +0800
OS Version:      Mac OS X 10.14 (18A391)
Report Version:  7
Analysis Tool:   /usr/bin/sample
Physical footprint:         2800K
Physical footprint (peak):  2808K
Call graph:
2578 Thread_1968217   DispatchQueue_1: com.apple.main-thread  (serial)
+ 2578 start  (in cargo) + 52  [0x102daa734]
+   2578 main  (in cargo) + 44  [0x102df017c]
+     2578 std::rt::lang_start_internal::h7e35fa7b4fe23cb1  (in cargo) + 237  [0x1034fd3ed]
+       2578 __rust_maybe_catch_panic  (in cargo) + 31  [0x10351f52f]
+         2578 std::panicking::try::do_call::h4a9f37ca731083ce (.llvm.2541341180027714544)  (in cargo) + 24  [0x103512358]
+           2578 std::rt::lang_start::_$u7b$$u7b$closure$u7d$$u7d$::h60875f1a135358bf  (in cargo) + 6  [0x102de5896]
+             2578 cargo::main::h6a4ec15b04c1213b  (in cargo) + 235  [0x102dedc5b]
+               2578 cargo::cli::main::h936dfe017da4c9f4  (in cargo) + 5530  [0x102dbdaca]
+                 2578 cargo::commands::metadata::exec::h4255d867d07bbdf2  (in cargo) + 899  [0x102db8943]
+                   2578 cargo::ops::cargo_output_metadata::output_metadata::h4530285e00cd2c5d  (in cargo) + 1218  [0x102f62cf2]
+                     2578 cargo::ops::resolve::resolve_ws_precisely::h59f93a8c5149688a  (in cargo) + 221  [0x10317200d]
+                       2578 cargo::ops::resolve::resolve_ws_with_method::he0e28571e773042e  (in cargo) + 305  [0x103172191]
+                         2578 cargo::ops::resolve::resolve_with_registry::hff9e30fccfc0283d  (in cargo) + 197  [0x103172ab5]
+                           2578 cargo::ops::resolve::resolve_with_previous::h8226461f70f499b9  (in cargo) + 6574  [0x10317458e]
+                             2578 cargo::core::resolver::resolve::hbfd2f7f630ab8d85  (in cargo) + 300  [0x10316475c]
+                               2578 cargo::core::resolver::activate_deps_loop::h79c35fd152977c25  (in cargo) + 533  [0x103165875]
+                                 2578 cargo::core::resolver::activate::hc38d720a4b0e0074  (in cargo) + 1069  [0x10316ca0d]
+                                   2578 cargo::core::resolver::context::Context::build_deps::h2331a4aa7ffddb3d  (in cargo) + 6542  [0x102ef987e]
+                                     2578 $LT$alloc..vec..Vec$LT$T$GT$$u20$as$u20$alloc..vec..SpecExtend$LT$T$C$$u20$I$GT$$GT$::from_iter::h8a71e59afc5e3143  (in cargo) + 40  [0x1031425a8]
+                                       2578 $LT$$RF$mut$u20$I$u20$as$u20$core..iter..iterator..Iterator$GT$::next::h0942267ad17afe7e  (in cargo) + 132  [0x102f46624]
+                                         2578 core::ops::function::impls::$LT$impl$u20$core..ops..function..FnOnce$LT$A$GT$$u20$for$u20$$RF$mut$u20$F$GT$::call_once::hbad11779cba7e7a3  (in cargo) + 1662  [0x102ee351e]
+                                           2578 $LT$cargo..core..registry..PackageRegistry$LT$$u27$cfg$GT$$u20$as$u20$cargo..core..registry..Registry$GT$::query::h9a808ca0a8a1a1a3  (in cargo) + 1556  [0x103113cd4]
+                                             2578 cargo::core::registry::PackageRegistry::ensure_loaded::h7d223efc04e80062 (.llvm.114276866467408042)  (in cargo) + 994  [0x103112672]
+                                               2578 $LT$cargo..sources..git..source..GitSource$LT$$u27$cfg$GT$$u20$as$u20$cargo..core..source..Source$GT$::update::hd45c70ca2c7484ca  (in cargo) + 2709  [0x102f6dda5]
+                                                 2578 cargo::sources::git::utils::GitRemote::checkout::hf633a207cd238cc0  (in cargo) + 2250  [0x102e5c0ea]
+                                                   2578 cargo::sources::git::utils::fetch::h3bcd43b92793a780  (in cargo) + 5384  [0x102e62758]
+                                                     2578 cargo::sources::git::utils::with_fetch_options::h387ecd44695c621b  (in cargo) + 455  [0x102e60287]
+                                                       2578 cargo::sources::git::utils::with_fetch_options::$u7b$$u7b$closure$u7d$$u7d$::$u7b$$u7b$closure$u7d$$u7d$::h0d04c0ace637f18e  (in cargo) + 329  [0x102e611a9]
+                                                         2578 cargo::sources::git::utils::fetch::$u7b$$u7b$closure$u7d$$u7d$::h6a4456a0a50d8ff0  (in cargo) + 390  [0x102e63246]
+                                                           2578 git2::remote::Remote::fetch::hfce0f4b758befd5b  (in cargo) + 593  [0x103275fb1]
+                                                             2578 git_remote_fetch  (in cargo) + 167  [0x1032c4fd7]
+                                                               2578 git_remote_connect  (in cargo) + 391  [0x1032c46f7]
+                                                                 2578 git_smart__connect  (in cargo) + 294  [0x1032e3156]
+                                                                   2578 git_smart__store_refs  (in cargo) + 178  [0x1032e4362]
+                                                                     2578 git_smart__recv_cb  (in cargo) + 53  [0x1032e2b95]
+                                                                       1770 http_stream_read  (in cargo) + 560  [0x1032e0d20]
+                                                                       ! 1448 recv_stream  (in cargo) + 30  [0x1032aa86e]
+                                                                       ! : 723 stransport_read  (in cargo) + 40  [0x1032e8508]
+                                                                       ! : | 400 giterr_clear  (in cargo) + 11  [0x1032975eb]
+                                                                       ! : | + 285 git__global_state  (in cargo) + 104,27,...  [0x10329c4c8,0x10329c47b,...]
+                                                                       ! : | + 61 git__global_state  (in cargo) + 27  [0x10329c47b]
+                                                                       ! : | + ! 61 pthread_getspecific  (in libsystem_pthread.dylib) + 0,9  [0x7fff7122d7c5,0x7fff7122d7ce]
+                                                                       ! : | + 54 DYLD-STUB$$pthread_getspecific  (in cargo) + 0  [0x103557316]
+                                                                       ! : | 184 giterr_clear  (in cargo) + 4,83,...  [0x1032975e4,0x103297633,...]
+                                                                       ! : | 89 giterr_clear  (in cargo) + 88  [0x103297638]
+                                                                       ! : | + 89 __error  (in libsystem_kernel.dylib) + 0,23,...  [0x7fff7117655d,0x7fff71176574,...]
+                                                                       ! : | 50 DYLD-STUB$$__error  (in cargo) + 0  [0x103556f98]
+                                                                       ! : 430 stransport_read  (in cargo) + 24  [0x1032e84f8]
+                                                                       ! : | 430 SSLRead  (in Security) + 91,0,...  [0x7fff4fa23b74,0x7fff4fa23b19,...]
+                                                                       ! : 252 stransport_read  (in cargo) + 35,4,...  [0x1032e8503,0x1032e84e4,...]
+                                                                       ! : 43 DYLD-STUB$$SSLRead  (in cargo) + 0  [0x103556ee4]
+                                                                       ! 271 recv_stream  (in cargo) + 6,21,...  [0x1032aa856,0x1032aa865,...]
+                                                                       ! 51 gitno_recv  (in cargo) + 4  [0x1032aa7a4]
+                                                                       407 http_stream_read  (in cargo) + 658  [0x1032e0d82]
+                                                                       ! 407 http_parser_execute  (in cargo) + 12,20,...  [0x1032e86ec,0x1032e86f4,...]
+                                                                       400 http_stream_read  (in cargo) + 677,574,...  [0x1032e0d95,0x1032e0d2e,...]
+                                                                       1 gitno_recv  (in cargo) + 5  [0x1032aa7a5]
2578 Thread_1968218
2578 start_wqthread  (in libsystem_pthread.dylib) + 13  [0x7fff7122e415]
2578 _pthread_wqthread  (in libsystem_pthread.dylib) + 446  [0x7fff7122e641]
2578 __workq_kernreturn  (in libsystem_kernel.dylib) + 10  [0x7fff711775be]
Total number in stack (recursive counted multiple, when >=5):
Sort by top of stack, same collapsed (when >= 5):
__workq_kernreturn  (in libsystem_kernel.dylib)        2578
SSLRead  (in Security)        430
http_parser_execute  (in cargo)        407
http_stream_read  (in cargo)        400
git__global_state  (in cargo)        285
recv_stream  (in cargo)        271
stransport_read  (in cargo)        252
giterr_clear  (in cargo)        184
__error  (in libsystem_kernel.dylib)        89
pthread_getspecific  (in libsystem_pthread.dylib)        61
DYLD-STUB$$pthread_getspecific  (in cargo)        54
gitno_recv  (in cargo)        52
DYLD-STUB$$__error  (in cargo)        50
DYLD-STUB$$SSLRead  (in cargo)        43
Binary Images:
0x102da9000 -        0x10376c0d7 +cargo (???) <85ACA0B0-D547-30E2-A494-108E8CFEB10D> /Users/shenshouer/.rustup/toolchains/nightly-x86_64-apple-darwin/bin/cargo
0x10e69f000 -        0x10e71d6a7  dyld (625.13)  /usr/lib/dyld
0x7fff4029f000 -     0x7fff4029ffff  com.apple.Accelerate (1.11 - Accelerate 1.11) <2C602CED-72CA-37C2-BDF5-31697FC9100B> /System/Library/Frameworks/Accelerate.framework/Versions/A/Accelerate
0x7fff402b7000 -     0x7fff40957fe3  com.apple.vImage (8.1 - ???) <65912AFB-D4C1-3494-AE97-DDFDAF3BE1EB> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vImage.framework/Versions/A/vImage
0x7fff40958000 -     0x7fff40bcffd7  libBLAS.dylib (1243.200.4) <76710990-AE2B-300E-88BB-797ABAD74956> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
0x7fff40bd0000 -     0x7fff40c42fe7  libBNNS.dylib (38.200.5) <5F3A4021-8FF8-30E8-B84A-AA2BD70F4151> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBNNS.dylib
0x7fff40c43000 -     0x7fff40fe9fff  libLAPACK.dylib (1243.200.4) <45722A8A-5788-3C4C-ADD9-1812763FA635> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libLAPACK.dylib
0x7fff40fea000 -     0x7fff40fffffb  libLinearAlgebra.dylib (1243.200.4)  /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libLinearAlgebra.dylib
0x7fff41000000 -     0x7fff41005ff3  libQuadrature.dylib (3.200.2) <6FFAC142-415D-3AF0-BC09-336302F11934> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libQuadrature.dylib
0x7fff41006000 -     0x7fff41083ffb  libSparse.dylib (79.200.5) <0D7E71A4-10D2-3979-B386-D2426ADAF6D7> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libSparse.dylib
0x7fff41084000 -     0x7fff41097ffb  libSparseBLAS.dylib (1243.200.4) <00D6FC17-B739-3259-90A4-92AC8BBE03D6> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libSparseBLAS.dylib
0x7fff41098000 -     0x7fff4127cff3  libvDSP.dylib (671.201.1) <716585BD-04D7-30A9-B315-689184275E38> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvDSP.dylib
0x7fff4127d000 -     0x7fff41332ff3  libvMisc.dylib (671.201.1)  /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvMisc.dylib
0x7fff41333000 -     0x7fff41333fff  com.apple.Accelerate.vecLib (3.11 - vecLib 3.11)  /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/vecLib
0x7fff42355000 -     0x7fff42355fff  com.apple.ApplicationServices (50.1 - 50.1) <1B71604B-9AC5-3A2F-8CB7-0EFA34A20F12> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices
0x7fff42356000 -     0x7fff423c1ff7  com.apple.ApplicationServices.ATS (377 - 453.11) <7599E619-EE21-3EB7-875B-AE3B8D3E13BB> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/ATS
0x7fff4245a000 -     0x7fff42579fff  libFontParser.dylib (228.6)  /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/Resources/libFontParser.dylib
0x7fff4257a000 -     0x7fff425c5fff  libFontRegistry.dylib (228.12) <480D472D-C8FB-321D-86EC-2EA6927A97AD> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/Resources/libFontRegistry.dylib
0x7fff426c1000 -     0x7fff426c5ff3  com.apple.ColorSyncLegacy (4.13.0 - 1) <90641B6B-D07B-3577-B594-965825544B60> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ColorSyncLegacy.framework/Versions/A/ColorSyncLegacy
0x7fff42762000 -     0x7fff427b4ff3  com.apple.HIServices (1.22 - 627.14.2) <01F309D6-32E7-3C4F-A38B-8206EE3076CC> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/HIServices.framework/Versions/A/HIServices
0x7fff427b5000 -     0x7fff427c3ff3  com.apple.LangAnalysis (1.7.0 - 1.7.0) <67BC5855-B7A3-39E6-B5DD-52B287EB1532> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/LangAnalysis.framework/Versions/A/LangAnalysis
0x7fff427c4000 -     0x7fff42810fff  com.apple.print.framework.PrintCore (14.0 - 503.7)  /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/PrintCore.framework/Versions/A/PrintCore
0x7fff42811000 -     0x7fff4284cff7  com.apple.QD (3.12 - 407.2) <94A30038-C545-327A-B1C0-E19C79D62BAB> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/QD.framework/Versions/A/QD
0x7fff4284d000 -     0x7fff42859ff7  com.apple.speech.synthesis.framework (8.0.15 - 8.0.15)  /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/SpeechSynthesis.framework/Versions/A/SpeechSynthesis
0x7fff4285a000 -     0x7fff42af6ff7  com.apple.audio.toolbox.AudioToolbox (1.14 - 1.14) <89D2529D-CF36-3081-A700-70892F888718> /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox
0x7fff42e5c000 -     0x7fff4321dff7  com.apple.CFNetwork (974.1 - 974.1)  /System/Library/Frameworks/CFNetwork.framework/Versions/A/CFNetwork
0x7fff43759000 -     0x7fff43825fff  com.apple.ColorSync (4.13.0 - 3340) <0618DA46-5A5E-339D-BB2F-ED66A2BFCCF9> /System/Library/Frameworks/ColorSync.framework/Versions/A/ColorSync
0x7fff439c0000 -     0x7fff43a50fff  com.apple.audio.CoreAudio (4.3.0 - 4.3.0) <5845D43B-BBB5-343B-A164-6F9E2C53CFA3> /System/Library/Frameworks/CoreAudio.framework/Versions/A/CoreAudio
0x7fff43ae2000 -     0x7fff43e82feb  com.apple.CoreData (120 - 865.2) <90A5058F-A5AF-311A-81CC-B20C2AC9E85E> /System/Library/Frameworks/CoreData.framework/Versions/A/CoreData
0x7fff43e83000 -     0x7fff43f6cfff  com.apple.CoreDisplay (101.3 - 101.17.6) <4AE5C221-B8E1-3A4F-91E0-96ED5926E82B> /System/Library/Frameworks/CoreDisplay.framework/Versions/A/CoreDisplay
0x7fff43f6d000 -     0x7fff443bcfff  com.apple.CoreFoundation (6.9 - 1555.10) <4A4C87BC-4C8E-392A-ABEE-824D4074C485> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x7fff443be000 -     0x7fff44a4bfff  com.apple.CoreGraphics (2.0 - 1245.8.4.8)  /System/Library/Frameworks/CoreGraphics.framework/Versions/A/CoreGraphics
0x7fff44a4d000 -     0x7fff44d72ff7  com.apple.CoreImage (14.0.0 - 700.2.220)  /System/Library/Frameworks/CoreImage.framework/Versions/A/CoreImage
0x7fff45229000 -     0x7fff45229fff  com.apple.CoreServices (933 - 933)  /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices
0x7fff4522a000 -     0x7fff452a8ffb  com.apple.AE (768 - 768)  /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/AE.framework/Versions/A/AE
0x7fff452a9000 -     0x7fff45581ff7  com.apple.CoreServices.CarbonCore (1178.11 - 1178.11) <9FBE7BFB-3A81-37AC-8E15-E6F7932BBDC0> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/CarbonCore
0x7fff45582000 -     0x7fff455ccff7  com.apple.DictionaryServices (1.2 - 284.16.3)  /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/DictionaryServices.framework/Versions/A/DictionaryServices
0x7fff455cd000 -     0x7fff455d5ffb  com.apple.CoreServices.FSEvents (1239.200.12 - 1239.200.12)  /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/FSEvents.framework/Versions/A/FSEvents
0x7fff455d6000 -     0x7fff457a1ff7  com.apple.LaunchServices (933 - 933) <4614A4B4-C358-3460-9FA7-DF8D6C466806> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/LaunchServices
0x7fff457a2000 -     0x7fff45844ffb  com.apple.Metadata (10.7.0 - 1191.51) <6B9CCA98-6F68-3908-A7A9-96D3E2AE5968> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Metadata
0x7fff45845000 -     0x7fff45890ff7  com.apple.CoreServices.OSServices (933 - 933)  /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/OSServices.framework/Versions/A/OSServices
0x7fff45891000 -     0x7fff458ffff7  com.apple.SearchKit (1.4.0 - 1.4.0)  /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/SearchKit.framework/Versions/A/SearchKit
0x7fff45900000 -     0x7fff45924ffb  com.apple.coreservices.SharedFileList (71.27 - 71.27)  /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/SharedFileList.framework/Versions/A/SharedFileList
0x7fff45c67000 -     0x7fff45dccfff  com.apple.CoreText (352.0 - 584.24) <5B55B533-F4DE-32CE-8739-16FFFA1A64F8> /System/Library/Frameworks/CoreText.framework/Versions/A/CoreText
0x7fff45dcd000 -     0x7fff45e0afff  com.apple.CoreVideo (1.8 - 0.0)  /System/Library/Frameworks/CoreVideo.framework/Versions/A/CoreVideo
0x7fff4611e000 -     0x7fff46123fff  com.apple.DiskArbitration (2.7 - 2.7)  /System/Library/Frameworks/DiskArbitration.framework/Versions/A/DiskArbitration
0x7fff462ec000 -     0x7fff466bafff  com.apple.Foundation (6.9 - 1555.10) <0CCAF9AF-F7AF-3174-98D4-6C188B1079CC> /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
0x7fff4672b000 -     0x7fff4675bff3  com.apple.GSS (4.0 - 2.0) <74ACB1A1-A5A4-3180-AC00-688C94AA4434> /System/Library/Frameworks/GSS.framework/Versions/A/GSS
0x7fff469df000 -     0x7fff46a70fff  com.apple.framework.IOKit (2.0.2 - 1483.201.1)  /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x7fff46a72000 -     0x7fff46a7cff7  com.apple.IOSurface (255.1 - 255.1) <538F0257-A408-36AF-AB1E-1D7037D6359E> /System/Library/Frameworks/IOSurface.framework/Versions/A/IOSurface
0x7fff46ad3000 -     0x7fff46c67ff7  com.apple.ImageIO.framework (3.3.0 - 1796.5.4.1) <9D078F50-BB75-3D04-8636-3FDDAB9C95DA> /System/Library/Frameworks/ImageIO.framework/Versions/A/ImageIO
0x7fff46c68000 -     0x7fff46c6cffb  libGIF.dylib (1796.5.4.1) <93AD6FB9-03BA-350E-AF98-D371A2BFD58F> /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libGIF.dylib
0x7fff46c6d000 -     0x7fff46d52fef  libJP2.dylib (1796.5.4.1) <3780EB9B-5219-385D-9472-17B0397697A5> /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libJP2.dylib
0x7fff46d53000 -     0x7fff46d78ff7  libJPEG.dylib (1796.5.4.1) <83CA8BEB-34BD-3B58-A704-C6A875984FAD> /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libJPEG.dylib
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0x7fff70ebf000 -     0x7fff70ec3ff3  libcache.dylib (81)  /usr/lib/system/libcache.dylib
0x7fff70ec4000 -     0x7fff70eceff3  libcommonCrypto.dylib (60118.200.6) <78093D4F-91DB-35C8-981A-13375778B2E7> /usr/lib/system/libcommonCrypto.dylib
0x7fff70ecf000 -     0x7fff70ed6fff  libcompiler_rt.dylib (63.4)  /usr/lib/system/libcompiler_rt.dylib
0x7fff70ed7000 -     0x7fff70ee0ff3  libcopyfile.dylib (146.200.3) <4BCDADBF-79F5-3829-B47D-64DA0D44BCBF> /usr/lib/system/libcopyfile.dylib
0x7fff70ee1000 -     0x7fff70f65fff  libcorecrypto.dylib (602.200.50) <7AEC5B72-0B92-37E8-808B-6732DB714139> /usr/lib/system/libcorecrypto.dylib
0x7fff70feb000 -     0x7fff71025ff7  libdispatch.dylib (1008.200.78)  /usr/lib/system/libdispatch.dylib
0x7fff71026000 -     0x7fff71055fff  libdyld.dylib (625.13) <4B16C209-83D4-3817-9B62-C2F7FFB23755> /usr/lib/system/libdyld.dylib
0x7fff71056000 -     0x7fff71056ffb  libkeymgr.dylib (30)  /usr/lib/system/libkeymgr.dylib
0x7fff71057000 -     0x7fff71063ff7  libkxld.dylib (4903.201.2)  /usr/lib/system/libkxld.dylib
0x7fff71064000 -     0x7fff71064ff7  liblaunch.dylib (1336.201.2) <43E6698E-155E-3EAE-BAFF-CA5FCB35325C> /usr/lib/system/liblaunch.dylib
0x7fff71065000 -     0x7fff7106afff  libmacho.dylib (917) <17BF7038-9C70-3EE1-9E96-3AE10D49669E> /usr/lib/system/libmacho.dylib
0x7fff7106b000 -     0x7fff7106dff3  libquarantine.dylib (86.200.11)  /usr/lib/system/libquarantine.dylib
0x7fff7106e000 -     0x7fff7106fff3  libremovefile.dylib (45.200.2)  /usr/lib/system/libremovefile.dylib
0x7fff71070000 -     0x7fff71087ff3  libsystem_asl.dylib (356.200.4)  /usr/lib/system/libsystem_asl.dylib
0x7fff71088000 -     0x7fff71088fff  libsystem_blocks.dylib (73) <26419398-C30C-30F1-B656-A92AFA9560F6> /usr/lib/system/libsystem_blocks.dylib
0x7fff71089000 -     0x7fff71111fff  libsystem_c.dylib (1272.200.26) <3DEEE96E-6DF6-35AD-8654-D69AC26B907B> /usr/lib/system/libsystem_c.dylib
0x7fff71112000 -     0x7fff71115ff7  libsystem_configuration.dylib (963.200.27) <02CC3996-B34E-333C-8806-AE2699D34424> /usr/lib/system/libsystem_configuration.dylib
0x7fff71116000 -     0x7fff71119ff7  libsystem_coreservices.dylib (66) <254B6849-2C8F-302C-8616-B8324A11AB30> /usr/lib/system/libsystem_coreservices.dylib
0x7fff7111a000 -     0x7fff71120ffb  libsystem_darwin.dylib (1272.200.26) <974E9EF7-DE72-34B7-B056-0A81C10DF8EB> /usr/lib/system/libsystem_darwin.dylib
0x7fff71121000 -     0x7fff71127ff7  libsystem_dnssd.dylib (878.200.35)  /usr/lib/system/libsystem_dnssd.dylib
0x7fff71128000 -     0x7fff71174ff3  libsystem_info.dylib (517.200.9) <0707C387-D7DE-372E-8FF1-3DE5C91932D6> /usr/lib/system/libsystem_info.dylib
0x7fff71175000 -     0x7fff7119cff7  libsystem_kernel.dylib (4903.201.2) <45FAA4C0-D553-34FD-ADF8-884886AE0D2A> /usr/lib/system/libsystem_kernel.dylib
0x7fff7119d000 -     0x7fff711e8ff7  libsystem_m.dylib (3158.200.7) <43aD1796B-954F-37D6-B1AC-9D80DF0655A2> /usr/lib/system/libsystem_m.dylib
0x7fff711e9000 -     0x7fff7120dff7  libsystem_malloc.dylib (166.200.60) <846F6898-117C-3427-A8FB-3772FFC2410B> /usr/lib/system/libsystem_malloc.dylib
0x7fff7120e000 -     0x7fff71219ffb  libsystem_networkextension.dylib (767.200.40)  /usr/lib/system/libsystem_networkextension.dylib
0x7fff7121a000 -     0x7fff71221fff  libsystem_notify.dylib (172.200.21)  /usr/lib/system/libsystem_notify.dylib
0x7fff71222000 -     0x7fff7122bfef  libsystem_platform.dylib (177.200.16)  /usr/lib/system/libsystem_platform.dylib
0x7fff7122c000 -     0x7fff71236fff  libsystem_pthread.dylib (330.201.1) <87A6B136-E423-3B6D-A58A-137F392D7D9D> /usr/lib/system/libsystem_pthread.dylib
0x7fff71237000 -     0x7fff7123aff7  libsystem_sandbox.dylib (851.201.1)  /usr/lib/system/libsystem_sandbox.dylib
0x7fff7123b000 -     0x7fff7123dff7  libsystem_secinit.dylib (30.200.13)  /usr/lib/system/libsystem_secinit.dylib
0x7fff7123e000 -     0x7fff71245ff7  libsystem_symptoms.dylib (820.207.88)  /usr/lib/system/libsystem_symptoms.dylib
0x7fff71246000 -     0x7fff7125bff7  libsystem_trace.dylib (906.200.86) <7983ED77-18B5-39A5-BE19-AE4F2832ADEA> /usr/lib/system/libsystem_trace.dylib
0x7fff7125d000 -     0x7fff71262ffb  libunwind.dylib (35.4) <41222EF6-2233-3CF4-947A-15D48CB8C030> /usr/lib/system/libunwind.dylib
0x7fff71263000 -     0x7fff71293fff  libxpc.dylib (1336.201.2) <0A8747D1-33AA-37E1-B97A-BA9B95FE4E8C> /usr/lib/system/libxpc.dylib
Sample analysis of process 26026 written to file /dev/stdout

authors: alexcrichton carols10cents paulrouget shenshouer