text:
objc[27844]: Class AMSupportURLConnectionDelegate is implemented in both ?? (0x1ebc04188) and ??     (0x11614c2b8). One of the two will be used. Which one is undefined.

Steps to Reproduce

I done a flutter application on Mac book pro(intel) after I switch to Mac book pro (M1 Apple Silicon) my application is not working. it's showing an error. Same code working in Intel but not in the M1 chip laptop.
So I created a sample project on flutter. it's working, after I added the Firebase Auth library. I'm getting this error. overall the issue is Flutter Firebase Auth library.
I tried fluttter Firebase Auth library. multiple versions.
Flutter version is

Flutter 2.1.0-11.0.pre.145 • channel master • https://github.com/flutter/flutter.git
Framework • revision a0ba646408 (25 hours ago) • 2021-03-05 22:09:03 -0500
Engine • revision f751d04fa0
Tools • Dart 2.13.0 (build 2.13.0-107.0.dev
```)

## Logs

<details>
<summary>
Prasaths-MacBook-Pro:ios prasathsivanathan$ flutter run
Changing current working directory to: /Users/prasathsivanathan/Desktop/Projects/f/2/check
Launching lib/main.dart on iPhone 11 in debug mode...
Running pod install...                                           2,356ms
Running Xcode build...
Xcode build done.                                            1.2s
Failed to build iOS app
Error output from Xcode build:
↳
    objc[27844]: Class AMSupportURLConnectionDelegate is implemented in both ?? (0x1ebc04188) and ??
    (0x11614c2b8). One of the two will be used. Which one is undefined.
    objc[27844]: Class AMSupportURLSession is implemented in both ?? (0x1ebc041d8) and ?? (0x11614c308). One of
    the two will be used. Which one is undefined.
    ** BUILD FAILED **

Xcode's output:
↳
    note: Using new build system
    note: Building targets in parallel
    note: Planning build
    note: Analyzing workspace
    note: Constructing build description
    note: Build preparation complete
    /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Flutter/Debug.xcconfig:1:1: error: unable to open
    file (in target "Runner" in project "Runner")
    /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Flutter/Debug.xcconfig:1:1: error: unable to open
    file (in target "Runner" in project "Runner")
    /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Flutter/Debug.xcconfig:1:1: error: unable to open
    file (in target "Runner" in project "Runner")
    warning: Capabilities for Signing & Capabilities may not function correctly because its entitlements use a
    placeholder team ID. To resolve this, select a development team in the Runner editor. (in target 'Runner'
    from project 'Runner')
    warning: Unable to read contents of XCFileList '/Target Support
    Files/Pods-Runner/Pods-Runner-frameworks-Debug-output-files.xcfilelist' (in target 'Runner' from project
    'Runner')
    error: Unable to load contents of file list: '/Target Support
    Files/Pods-Runner/Pods-Runner-frameworks-Debug-input-files.xcfilelist' (in target 'Runner' from project
    'Runner')
    error: Unable to load contents of file list: '/Target Support
    Files/Pods-Runner/Pods-Runner-frameworks-Debug-output-files.xcfilelist' (in target 'Runner' from project
    'Runner')

Could not build the application for the simulator.
Error launching application on iPhone 11.
</summary>

##flutter run -v
<!--
   PRODUCT_MODULE_NAME = Runner
                        PRODUCT_NAME = Runner
                        PRODUCT_SETTINGS_PATH =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Runner/Info.plist
                        PRODUCT_TYPE = com.apple.product-type.application
                        PROFILING_CODE = NO
                        PROJECT = Runner
                        PROJECT_DERIVED_FILE_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Runner.build/DerivedSource
                        s
                        PROJECT_DIR = /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios
                        PROJECT_FILE_PATH =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Runner.xcodeproj
                        PROJECT_NAME = Runner
                        PROJECT_TEMP_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Runner.build
                        PROJECT_TEMP_ROOT = /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios
                        PROVISIONING_PROFILE_REQUIRED = YES
                        PUBLIC_HEADERS_FOLDER_PATH = Runner.app/Headers
                        RECURSIVE_SEARCH_PATHS_FOLLOW_SYMLINKS = YES
                        REMOVE_CVS_FROM_RESOURCES = YES
                        REMOVE_GIT_FROM_RESOURCES = YES
                        REMOVE_HEADERS_FROM_EMBEDDED_BUNDLES = YES
                        REMOVE_HG_FROM_RESOURCES = YES
                        REMOVE_SVN_FROM_RESOURCES = YES
                        RESOURCE_RULES_REQUIRED = YES
                        REZ_COLLECTOR_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Runner.build/Release-iphon
                        eos/Runner.build/ResourceManagerResources
                        REZ_OBJECTS_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Runner.build/Release-iphon
                        eos/Runner.build/ResourceManagerResources/Objects
                        SCAN_ALL_SOURCE_FILES_FOR_INCLUDES = NO
                        SCRIPTS_FOLDER_PATH = Runner.app/Scripts
                        SDKROOT =
                        /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SD
                        Ks/iPhoneOS14.5.sdk
                        SDK_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SD
                        Ks/iPhoneOS14.5.sdk
                        SDK_DIR_iphoneos14_5 =
                        /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SD
                        Ks/iPhoneOS14.5.sdk
                        SDK_NAME = iphoneos14.5
                        SDK_NAMES = iphoneos14.5
                        SDK_PRODUCT_BUILD_VERSION = 18E5154g
                        SDK_VERSION = 14.5
                        SDK_VERSION_ACTUAL = 140500
                        SDK_VERSION_MAJOR = 140000
                        SDK_VERSION_MINOR = 140500
                        SED = /usr/bin/sed
                        SEPARATE_STRIP = NO
                        SEPARATE_SYMBOL_EDIT = NO
                        SET_DIR_MODE_OWNER_GROUP = YES
                        SET_FILE_MODE_OWNER_GROUP = NO
                        SHALLOW_BUNDLE = YES
                        SHARED_DERIVED_FILE_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Release-iphoneos/DerivedSo
                        urces
                        SHARED_FRAMEWORKS_FOLDER_PATH = Runner.app/SharedFrameworks
                        SHARED_PRECOMPS_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/SharedPrecompiledHeaders
                        SHARED_SUPPORT_FOLDER_PATH = Runner.app/SharedSupport
                        SKIP_INSTALL = NO
                        SOURCE_ROOT = /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios
                        SRCROOT = /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios
                        STRINGS_FILE_INFOPLIST_RENAME = YES
                        STRINGS_FILE_OUTPUT_ENCODING = binary
                        STRIP_BITCODE_FROM_COPIED_FILES = YES
                        STRIP_INSTALLED_PRODUCT = YES
                        STRIP_STYLE = all
                        STRIP_SWIFT_SYMBOLS = YES
                        SUPPORTED_DEVICE_FAMILIES = 1,2
                        SUPPORTED_PLATFORMS = iphoneos
                        SUPPORTS_MACCATALYST = NO
                        SUPPORTS_TEXT_BASED_API = NO
                        SWIFT_COMPILATION_MODE = wholemodule
                        SWIFT_OBJC_BRIDGING_HEADER = Runner/Runner-Bridging-Header.h
                        SWIFT_OPTIMIZATION_LEVEL = -O
                        SWIFT_PLATFORM_TARGET_PREFIX = ios
                        SWIFT_VERSION = 5.0
                        SYMROOT = /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios
                        SYSTEM_ADMIN_APPS_DIR = /Applications/Utilities
                        SYSTEM_APPS_DIR = /Applications
                        SYSTEM_CORE_SERVICES_DIR = /System/Library/CoreServices
                        SYSTEM_DEMOS_DIR = /Applications/Extras
                        SYSTEM_DEVELOPER_APPS_DIR = /Applications/Xcode-beta.app/Contents/Developer/Applications
                        SYSTEM_DEVELOPER_BIN_DIR = /Applications/Xcode-beta.app/Contents/Developer/usr/bin
                        SYSTEM_DEVELOPER_DEMOS_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Applications/Utilities/Built Examples
                        SYSTEM_DEVELOPER_DIR = /Applications/Xcode-beta.app/Contents/Developer
                        SYSTEM_DEVELOPER_DOC_DIR = /Applications/Xcode-beta.app/Contents/Developer/ADC Reference
                        Library
                        SYSTEM_DEVELOPER_GRAPHICS_TOOLS_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Applications/Graphics Tools
                        SYSTEM_DEVELOPER_JAVA_TOOLS_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Applications/Java Tools
                        SYSTEM_DEVELOPER_PERFORMANCE_TOOLS_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Applications/Performance Tools
                        SYSTEM_DEVELOPER_RELEASENOTES_DIR = /Applications/Xcode-beta.app/Contents/Developer/ADC
                        Reference Library/releasenotes
                        SYSTEM_DEVELOPER_TOOLS = /Applications/Xcode-beta.app/Contents/Developer/Tools
                        SYSTEM_DEVELOPER_TOOLS_DOC_DIR = /Applications/Xcode-beta.app/Contents/Developer/ADC
                        Reference Library/documentation/DeveloperTools
                        SYSTEM_DEVELOPER_TOOLS_RELEASENOTES_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/ADC Reference
                        Library/releasenotes/DeveloperTools
                        SYSTEM_DEVELOPER_USR_DIR = /Applications/Xcode-beta.app/Contents/Developer/usr
                        SYSTEM_DEVELOPER_UTILITIES_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Applications/Utilities
                        SYSTEM_DEXT_INSTALL_PATH = /System/Library/DriverExtensions
                        SYSTEM_DOCUMENTATION_DIR = /Library/Documentation
                        SYSTEM_KEXT_INSTALL_PATH = /System/Library/Extensions
                        SYSTEM_LIBRARY_DIR = /System/Library
                        TAPI_VERIFY_MODE = ErrorsOnly
                        TARGETED_DEVICE_FAMILY = 1,2
                        TARGETNAME = Runner
                        TARGET_BUILD_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Release-iphoneos
                        TARGET_NAME = Runner
                        TARGET_TEMP_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Runner.build/Release-iphon
                        eos/Runner.build
                        TEMP_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Runner.build/Release-iphon
                        eos/Runner.build
                        TEMP_FILES_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Runner.build/Release-iphon
                        eos/Runner.build
                        TEMP_FILE_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Runner.build/Release-iphon
                        eos/Runner.build
                        TEMP_ROOT = /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios
                        TEST_FRAMEWORK_SEARCH_PATHS =
                        /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Li
                        brary/Frameworks
                        /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SD
                        Ks/iPhoneOS14.5.sdk/Developer/Library/Frameworks
                        TEST_LIBRARY_SEARCH_PATHS =
                        /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/us
                        r/lib
                        TOOLCHAIN_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain
                        TRACK_WIDGET_CREATION = true
                        TREAT_MISSING_BASELINES_AS_TEST_FAILURES = NO
                        TREE_SHAKE_ICONS = false
                        UID = 501
                        UNLOCALIZED_RESOURCES_FOLDER_PATH = Runner.app
                        UNSTRIPPED_PRODUCT = NO
                        USER = prasathsivanathan
                        USER_APPS_DIR = /Users/prasathsivanathan/Applications
                        USER_LIBRARY_DIR = /Users/prasathsivanathan/Library
                        USE_DYNAMIC_NO_PIC = YES
                        USE_HEADERMAP = YES
                        USE_HEADER_SYMLINKS = NO
                        USE_LLVM_TARGET_TRIPLES = YES
                        USE_LLVM_TARGET_TRIPLES_FOR_CLANG = YES
                        USE_LLVM_TARGET_TRIPLES_FOR_LD = YES
                        USE_LLVM_TARGET_TRIPLES_FOR_TAPI = YES
                        USE_RECURSIVE_SCRIPT_INPUTS_IN_SCRIPT_PHASES = YES
                        VALIDATE_PRODUCT = YES
                        VALIDATE_WORKSPACE = NO
                        VALID_ARCHS = arm64 arm64e armv7 armv7s
                        VERBOSE_PBXCP = NO
                        VERSIONING_SYSTEM = apple-generic
                        VERSIONPLIST_PATH = Runner.app/version.plist
                        VERSION_INFO_BUILDER = prasathsivanathan
                        VERSION_INFO_FILE = Runner_vers.c
                        VERSION_INFO_STRING = "@(#)PROGRAM:Runner  PROJECT:Runner-1"
                        WRAPPER_EXTENSION = app
                        WRAPPER_NAME = Runner.app
                        WRAPPER_SUFFIX = .app
                        WRAP_ASSET_PACKS_IN_SEPARATE_DIRECTORIES = NO
                        XCODE_APP_SUPPORT_DIR = /Applications/Xcode-beta.app/Contents/Developer/Library/Xcode
                        XCODE_PRODUCT_BUILD_VERSION = 12E5234g
                        XCODE_VERSION_ACTUAL = 1250
                        XCODE_VERSION_MAJOR = 1200
                        XCODE_VERSION_MINOR = 1250
                        XPCSERVICES_FOLDER_PATH = Runner.app/XPCServices
                        YACC = yacc
                        arch = armv7
                        variant = normal

                    objc[31898]: Class AMSupportURLConnectionDelegate is implemented in both ?? (0x1ebc04188)
                    and ?? (0x11a1582b8). One of the two will be used. Which one is undefined.
                    objc[31898]: Class AMSupportURLSession is implemented in both ?? (0x1ebc041d8) and ??
                    (0x11a158308). One of the two will be used. Which one is undefined.
[  +47 ms] Building Runner.app for 198FFE27-DFFF-4E0B-A854-199D463C730F.
[  +25 ms] executing: xattr -r -d com.apple.FinderInfo /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios
[   +5 ms] executing: /usr/bin/arch -arm64e xcrun simctl spawn 198FFE27-DFFF-4E0B-A854-199D463C730F log stream
--style json --predicate eventType = logEvent AND processImagePath ENDSWITH "Runner" AND (senderImagePath
ENDSWITH "/Flutter" OR senderImagePath ENDSWITH "/libswiftCore.dylib" OR processImageUUID == senderImageUUID)
AND NOT(eventMessage CONTAINS ": could not find icon for representation -> com.apple.") AND NOT(eventMessage
BEGINSWITH "assertion failed: ") AND NOT(eventMessage CONTAINS " libxpc.dylib ")
[ +385 ms] Failed to remove xattr com.apple.FinderInfo from
/Users/prasathsivanathan/Desktop/Projects/f/2/check/ios
[  +65 ms] Found plugin firebase_auth at
/Users/prasathsivanathan/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth-0.16.1/
[   +1 ms] Found plugin firebase_auth_web at
/Users/prasathsivanathan/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_auth_web-0.1.3+1/
[   +2 ms] Found plugin firebase_core at
/Users/prasathsivanathan/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core-0.4.5/
[   +4 ms] Found plugin firebase_core_web at
/Users/prasathsivanathan/Developer/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-0.1.1+2/
[  +33 ms] executing: /usr/bin/plutil -convert json -o -
/Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Runner/Info.plist
[  +25 ms] Exit code 0 from: /usr/bin/plutil -convert json -o -
/Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Runner/Info.plist
[   +1 ms]
{"CFBundleShortVersionString":"$(FLUTTER_BUILD_NAME)","CFBundleIdentifier":"$(PRODUCT_BUNDLE_IDENTIFIER)","CFBun
dleInfoDictionaryVersion":"6.0","UIMainStoryboardFile":"Main","CFBundleVersion":"$(FLUTTER_BUILD_NUMBER)","UILau
nchStoryboardName":"LaunchScreen","CFBundleExecutable":"$(EXECUTABLE_NAME)","LSRequiresIPhoneOS":true,"UISupport
edInterfaceOrientations":["UIInterfaceOrientationPortrait","UIInterfaceOrientationLandscapeLeft","UIInterfaceOri
entationLandscapeRight"],"UIViewControllerBasedStatusBarAppearance":false,"CFBundleSignature":"????","CFBundlePa
ckageType":"APPL","CFBundleDevelopmentRegion":"$(DEVELOPMENT_LANGUAGE)","UISupportedInterfaceOrientations~ipad":
["UIInterfaceOrientationPortrait","UIInterfaceOrientationPortraitUpsideDown","UIInterfaceOrientationLandscapeLef
t","UIInterfaceOrientationLandscapeRight"],"CFBundleName":"check"}
[   +6 ms] executing: mkfifo
/var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools.lP7m8X/flutter_build_log_pipe.4rl7zJ/pipe_to_stdo
ut
[  +21 ms] Exit code 0 from: mkfifo
/var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools.lP7m8X/flutter_build_log_pipe.4rl7zJ/pipe_to_stdo
ut
[   +7 ms] Running Xcode build...
[   +3 ms] executing: [/Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/] /usr/bin/arch -arm64e xcrun
xcodebuild -configuration Debug VERBOSE_SCRIPT_LOGGING=YES -workspace Runner.xcworkspace -scheme Runner
BUILD_DIR=/Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios -sdk iphonesimulator
SCRIPT_OUTPUT_STREAM_FILE=/var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools.lP7m8X/flutter_build_lo
g_pipe.4rl7zJ/pipe_to_stdout FLUTTER_SUPPRESS_ANALYTICS=true COMPILER_INDEX_STORE_ENABLE=NO
[+1583 ms] Command line invocation:
                        /Applications/Xcode-beta.app/Contents/Developer/usr/bin/xcodebuild -configuration Debug
                        VERBOSE_SCRIPT_LOGGING=YES -workspace Runner.xcworkspace -scheme Runner
                        BUILD_DIR=/Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios -sdk
                        iphonesimulator
                        SCRIPT_OUTPUT_STREAM_FILE=/var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools
                        .lP7m8X/flutter_build_log_pipe.4rl7zJ/pipe_to_stdout FLUTTER_SUPPRESS_ANALYTICS=true
                        COMPILER_INDEX_STORE_ENABLE=NO

                    User defaults from command line:
                        IDEPackageSupportUseBuiltinSCM = YES

                    Build settings from command line:
                        BUILD_DIR = /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios
                        COMPILER_INDEX_STORE_ENABLE = NO
                        FLUTTER_SUPPRESS_ANALYTICS = true
                        SCRIPT_OUTPUT_STREAM_FILE =
                        /var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools.lP7m8X/flutter_build_log_
                        pipe.4rl7zJ/pipe_to_stdout
                        SDKROOT = iphonesimulator14.5
                        VERBOSE_SCRIPT_LOGGING = YES

                    note: Using new build system
                    note: Building targets in parallel
                    note: Planning build
                    note: Analyzing workspace
                    note: Constructing build description
                    note: Build preparation complete
                    /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Flutter/Debug.xcconfig:1:1: error:
                    unable to open file (in target "Runner" in project "Runner")
                    /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Flutter/Debug.xcconfig:1:1: error:
                    unable to open file (in target "Runner" in project "Runner")
                    /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Flutter/Debug.xcconfig:1:1: error:
                    unable to open file (in target "Runner" in project "Runner")
                    warning: Capabilities for Signing & Capabilities may not function correctly because its
                    entitlements use a placeholder team ID. To resolve this, select a development team in the
                    Runner editor. (in target 'Runner' from project 'Runner')
                    warning: Unable to read contents of XCFileList '/Target Support
                    Files/Pods-Runner/Pods-Runner-frameworks-Debug-output-files.xcfilelist' (in target 'Runner'
                    from project 'Runner')
                    error: Unable to load contents of file list: '/Target Support
                    Files/Pods-Runner/Pods-Runner-frameworks-Debug-input-files.xcfilelist' (in target 'Runner'
                    from project 'Runner')
                    error: Unable to load contents of file list: '/Target Support
                    Files/Pods-Runner/Pods-Runner-frameworks-Debug-output-files.xcfilelist' (in target 'Runner'
                    from project 'Runner')

                    objc[31925]: Class AMSupportURLConnectionDelegate is implemented in both ?? (0x1ebc04188)
                    and ?? (0x117d382b8). One of the two will be used. Which one is undefined.
                    objc[31925]: Class AMSupportURLSession is implemented in both ?? (0x1ebc041d8) and ??
                    (0x117d38308). One of the two will be used. Which one is undefined.
                    2021-03-07 09:23:04.634 XCBBuildService[31926:1642756] Failed to remove:
                    /Users/prasathsivanathan/Library/Developer/Xcode/DerivedData/Runner-hfkfxxnsucjaxtglvkeuellv
                    lmyw/Build/Intermediates.noindex/XCBuildData/49018a821323cd85d6ec5eddf1a81c49-desc.xcbuild:
                    unlink(/Users/prasathsivanathan/Library/Developer/Xcode/DerivedData/Runner-hfkfxxnsucjaxtglv
                    keuellvlmyw/Build/Intermediates.noindex/XCBuildData/49018a821323cd85d6ec5eddf1a81c49-desc.xc
                    build): No such file or directory (2)
                    ** BUILD FAILED **
[  +21 ms] Running Xcode build... (completed in 1,590ms)
[   +4 ms] Xcode build done.                                            1.6s
[   +5 ms] executing: [/Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/] /usr/bin/arch -arm64e xcrun
xcodebuild -configuration Debug VERBOSE_SCRIPT_LOGGING=YES -workspace Runner.xcworkspace -scheme Runner
BUILD_DIR=/Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios -sdk iphonesimulator
SCRIPT_OUTPUT_STREAM_FILE=/var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools.lP7m8X/flutter_build_lo
g_pipe.4rl7zJ/pipe_to_stdout FLUTTER_SUPPRESS_ANALYTICS=true COMPILER_INDEX_STORE_ENABLE=NO -showBuildSettings
[        ] executing: [/Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/] /usr/bin/arch -arm64e xcrun
xcodebuild -configuration Debug VERBOSE_SCRIPT_LOGGING=YES -workspace Runner.xcworkspace -scheme Runner
BUILD_DIR=/Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios -sdk iphonesimulator
SCRIPT_OUTPUT_STREAM_FILE=/var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools.lP7m8X/flutter_build_lo
g_pipe.4rl7zJ/pipe_to_stdout FLUTTER_SUPPRESS_ANALYTICS=true COMPILER_INDEX_STORE_ENABLE=NO -showBuildSettings
[ +941 ms] Command line invocation:
                        /Applications/Xcode-beta.app/Contents/Developer/usr/bin/xcodebuild -configuration Debug
                        VERBOSE_SCRIPT_LOGGING=YES -workspace Runner.xcworkspace -scheme Runner
                        BUILD_DIR=/Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios -sdk
                        iphonesimulator
                        SCRIPT_OUTPUT_STREAM_FILE=/var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools
                        .lP7m8X/flutter_build_log_pipe.4rl7zJ/pipe_to_stdout FLUTTER_SUPPRESS_ANALYTICS=true
                        COMPILER_INDEX_STORE_ENABLE=NO -showBuildSettings

                    User defaults from command line:
                        IDEPackageSupportUseBuiltinSCM = YES

                    Build settings from command line:
                        BUILD_DIR = /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios
                        COMPILER_INDEX_STORE_ENABLE = NO
                        FLUTTER_SUPPRESS_ANALYTICS = true
                        SCRIPT_OUTPUT_STREAM_FILE =
                        /var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools.lP7m8X/flutter_build_log_
                        pipe.4rl7zJ/pipe_to_stdout
                        SDKROOT = iphonesimulator14.5
                        VERBOSE_SCRIPT_LOGGING = YES

                    Build settings for action build and target Runner:
                        ACTION = build
                        AD_HOC_CODE_SIGNING_ALLOWED = YES
                        ALTERNATE_GROUP = staff
                        ALTERNATE_MODE = u+w,go-w,a+rX
                        ALTERNATE_OWNER = prasathsivanathan
                        ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = NO
                        ALWAYS_SEARCH_USER_PATHS = NO
                        ALWAYS_USE_SEPARATE_HEADERMAPS = NO
                        APPLE_INTERNAL_DEVELOPER_DIR = /AppleInternal/Developer
                        APPLE_INTERNAL_DIR = /AppleInternal
                        APPLE_INTERNAL_DOCUMENTATION_DIR = /AppleInternal/Documentation
                        APPLE_INTERNAL_LIBRARY_DIR = /AppleInternal/Library
                        APPLE_INTERNAL_TOOLS = /AppleInternal/Developer/Tools
                        APPLICATION_EXTENSION_API_ONLY = NO
                        APPLY_RULES_IN_COPY_FILES = NO
                        APPLY_RULES_IN_COPY_HEADERS = NO
                        ARCHS = arm64
                        ARCHS_STANDARD = arm64 x86_64 i386
                        ARCHS_STANDARD_32_64_BIT = arm64 i386 x86_64
                        ARCHS_STANDARD_32_BIT = i386
                        ARCHS_STANDARD_64_BIT = arm64 x86_64
                        ARCHS_STANDARD_INCLUDING_64_BIT = arm64 x86_64 i386
                        ARCHS_UNIVERSAL_IPHONE_OS = arm64 i386 x86_64
                        ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon
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                        STRINGS_FILE_INFOPLIST_RENAME = YES
                        STRINGS_FILE_OUTPUT_ENCODING = binary
                        STRIP_BITCODE_FROM_COPIED_FILES = NO
                        STRIP_INSTALLED_PRODUCT = YES
                        STRIP_STYLE = all
                        STRIP_SWIFT_SYMBOLS = YES
                        SUPPORTED_DEVICE_FAMILIES = 1,2
                        SUPPORTED_PLATFORMS = iphonesimulator iphoneos
                        SUPPORTS_TEXT_BASED_API = NO
                        SWIFT_OBJC_BRIDGING_HEADER = Runner/Runner-Bridging-Header.h
                        SWIFT_OPTIMIZATION_LEVEL = -Onone
                        SWIFT_PLATFORM_TARGET_PREFIX = ios
                        SWIFT_VERSION = 5.0
                        SYMROOT =
                        /Users/prasathsivanathan/Library/Developer/Xcode/DerivedData/Runner-hfkfxxnsucjaxtglvkeu
                        ellvlmyw/Build/Products
                        SYSTEM_ADMIN_APPS_DIR = /Applications/Utilities
                        SYSTEM_APPS_DIR = /Applications
                        SYSTEM_CORE_SERVICES_DIR = /System/Library/CoreServices
                        SYSTEM_DEMOS_DIR = /Applications/Extras
                        SYSTEM_DEVELOPER_APPS_DIR = /Applications/Xcode-beta.app/Contents/Developer/Applications
                        SYSTEM_DEVELOPER_BIN_DIR = /Applications/Xcode-beta.app/Contents/Developer/usr/bin
                        SYSTEM_DEVELOPER_DEMOS_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Applications/Utilities/Built Examples
                        SYSTEM_DEVELOPER_DIR = /Applications/Xcode-beta.app/Contents/Developer
                        SYSTEM_DEVELOPER_DOC_DIR = /Applications/Xcode-beta.app/Contents/Developer/ADC Reference
                        Library
                        SYSTEM_DEVELOPER_GRAPHICS_TOOLS_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Applications/Graphics Tools
                        SYSTEM_DEVELOPER_JAVA_TOOLS_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Applications/Java Tools
                        SYSTEM_DEVELOPER_PERFORMANCE_TOOLS_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Applications/Performance Tools
                        SYSTEM_DEVELOPER_RELEASENOTES_DIR = /Applications/Xcode-beta.app/Contents/Developer/ADC
                        Reference Library/releasenotes
                        SYSTEM_DEVELOPER_TOOLS = /Applications/Xcode-beta.app/Contents/Developer/Tools
                        SYSTEM_DEVELOPER_TOOLS_DOC_DIR = /Applications/Xcode-beta.app/Contents/Developer/ADC
                        Reference Library/documentation/DeveloperTools
                        SYSTEM_DEVELOPER_TOOLS_RELEASENOTES_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/ADC Reference
                        Library/releasenotes/DeveloperTools
                        SYSTEM_DEVELOPER_USR_DIR = /Applications/Xcode-beta.app/Contents/Developer/usr
                        SYSTEM_DEVELOPER_UTILITIES_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Applications/Utilities
                        SYSTEM_DEXT_INSTALL_PATH = /System/Library/DriverExtensions
                        SYSTEM_DOCUMENTATION_DIR = /Library/Documentation
                        SYSTEM_KEXT_INSTALL_PATH = /System/Library/Extensions
                        SYSTEM_LIBRARY_DIR = /System/Library
                        TAPI_VERIFY_MODE = ErrorsOnly
                        TARGETED_DEVICE_FAMILY = 1,2
                        TARGETNAME = Runner
                        TARGET_BUILD_DIR =
                        /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios/Debug-iphonesimulator
                        TARGET_NAME = Runner
                        TARGET_TEMP_DIR =
                        /Users/prasathsivanathan/Library/Developer/Xcode/DerivedData/Runner-hfkfxxnsucjaxtglvkeu
                        ellvlmyw/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.build
                        TEMP_DIR =
                        /Users/prasathsivanathan/Library/Developer/Xcode/DerivedData/Runner-hfkfxxnsucjaxtglvkeu
                        ellvlmyw/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.build
                        TEMP_FILES_DIR =
                        /Users/prasathsivanathan/Library/Developer/Xcode/DerivedData/Runner-hfkfxxnsucjaxtglvkeu
                        ellvlmyw/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.build
                        TEMP_FILE_DIR =
                        /Users/prasathsivanathan/Library/Developer/Xcode/DerivedData/Runner-hfkfxxnsucjaxtglvkeu
                        ellvlmyw/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.build
                        TEMP_ROOT =
                        /Users/prasathsivanathan/Library/Developer/Xcode/DerivedData/Runner-hfkfxxnsucjaxtglvkeu
                        ellvlmyw/Build/Intermediates.noindex
                        TEST_FRAMEWORK_SEARCH_PATHS =
                        /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Devel
                        oper/Library/Frameworks
                        /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Devel
                        oper/SDKs/iPhoneSimulator14.5.sdk/Developer/Library/Frameworks
                        TEST_LIBRARY_SEARCH_PATHS =
                        /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Devel
                        oper/usr/lib
                        TOOLCHAIN_DIR =
                        /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain
                        TREAT_MISSING_BASELINES_AS_TEST_FAILURES = NO
                        UID = 501
                        UNLOCALIZED_RESOURCES_FOLDER_PATH = Runner.app
                        UNSTRIPPED_PRODUCT = NO
                        USER = prasathsivanathan
                        USER_APPS_DIR = /Users/prasathsivanathan/Applications
                        USER_LIBRARY_DIR = /Users/prasathsivanathan/Library
                        USE_DYNAMIC_NO_PIC = YES
                        USE_HEADERMAP = YES
                        USE_HEADER_SYMLINKS = NO
                        USE_LLVM_TARGET_TRIPLES = YES
                        USE_LLVM_TARGET_TRIPLES_FOR_CLANG = YES
                        USE_LLVM_TARGET_TRIPLES_FOR_LD = YES
                        USE_LLVM_TARGET_TRIPLES_FOR_TAPI = YES
                        VALIDATE_PRODUCT = NO
                        VALIDATE_WORKSPACE = NO
                        VALID_ARCHS = arm64 arm64e i386 x86_64
                        VERBOSE_PBXCP = NO
                        VERBOSE_SCRIPT_LOGGING = YES
                        VERSIONING_SYSTEM = apple-generic
                        VERSIONPLIST_PATH = Runner.app/version.plist
                        VERSION_INFO_BUILDER = prasathsivanathan
                        VERSION_INFO_FILE = Runner_vers.c
                        VERSION_INFO_STRING = "@(#)PROGRAM:Runner  PROJECT:Runner-"
                        WRAPPER_EXTENSION = app
                        WRAPPER_NAME = Runner.app
                        WRAPPER_SUFFIX = .app
                        WRAP_ASSET_PACKS_IN_SEPARATE_DIRECTORIES = NO
                        XCODE_APP_SUPPORT_DIR = /Applications/Xcode-beta.app/Contents/Developer/Library/Xcode
                        XCODE_PRODUCT_BUILD_VERSION = 12E5234g
                        XCODE_VERSION_ACTUAL = 1250
                        XCODE_VERSION_MAJOR = 1200
                        XCODE_VERSION_MINOR = 1250
                        XPCSERVICES_FOLDER_PATH = Runner.app/XPCServices
                        YACC = yacc
                        arch = arm64
                        variant = normal

                    objc[31940]: Class AMSupportURLConnectionDelegate is implemented in both ?? (0x1ebc04188)
                    and ?? (0x113e842b8). One of the two will be used. Which one is undefined.
                    objc[31940]: Class AMSupportURLSession is implemented in both ?? (0x1ebc041d8) and ??
                    (0x113e84308). One of the two will be used. Which one is undefined.
[  +23 ms] Failed to build iOS app
[   +2 ms] Error output from Xcode build:
           ↳
[   +2 ms]     objc[31925]: Class AMSupportURLConnectionDelegate is implemented in both ?? (0x1ebc04188) and ??
               (0x117d382b8). One of the two will be used. Which one is undefined.
               objc[31925]: Class AMSupportURLSession is implemented in both ?? (0x1ebc041d8) and ??
(0x117d38308). One of
               the two will be used. Which one is undefined.
               2021-03-07 09:23:04.634 XCBBuildService[31926:1642756] Failed to remove:

/Users/prasathsivanathan/Library/Developer/Xcode/DerivedData/Runner-hfkfxxnsucjaxtglvkeuellvlmyw/Build/Inter
               mediates.noindex/XCBuildData/49018a821323cd85d6ec5eddf1a81c49-desc.xcbuild:

unlink(/Users/prasathsivanathan/Library/Developer/Xcode/DerivedData/Runner-hfkfxxnsucjaxtglvkeuellvlmyw/Buil
               d/Intermediates.noindex/XCBuildData/49018a821323cd85d6ec5eddf1a81c49-desc.xcbuild): No such file
or
               directory (2)
               ** BUILD FAILED **

[   +1 ms] Xcode's output:
           ↳
[   +1 ms]     Command line invocation:
                   /Applications/Xcode-beta.app/Contents/Developer/usr/bin/xcodebuild -configuration Debug
                   VERBOSE_SCRIPT_LOGGING=YES -workspace Runner.xcworkspace -scheme Runner
                   BUILD_DIR=/Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios -sdk iphonesimulator

SCRIPT_OUTPUT_STREAM_FILE=/var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools.lP7m8X/flutter_
                   build_log_pipe.4rl7zJ/pipe_to_stdout FLUTTER_SUPPRESS_ANALYTICS=true
COMPILER_INDEX_STORE_ENABLE=NO

               User defaults from command line:
                   IDEPackageSupportUseBuiltinSCM = YES

               Build settings from command line:
                   BUILD_DIR = /Users/prasathsivanathan/Desktop/Projects/f/2/check/build/ios
                   COMPILER_INDEX_STORE_ENABLE = NO
                   FLUTTER_SUPPRESS_ANALYTICS = true
                   SCRIPT_OUTPUT_STREAM_FILE =

/var/folders/4g/jnp5bb456dx99hm7r4r54ql80000gn/T/flutter_tools.lP7m8X/flutter_build_log_pipe.4rl7zJ/pipe
                   _to_stdout
                   SDKROOT = iphonesimulator14.5
                   VERBOSE_SCRIPT_LOGGING = YES

               note: Using new build system
               note: Building targets in parallel
               note: Planning build
               note: Analyzing workspace
               note: Constructing build description
               note: Build preparation complete
               /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Flutter/Debug.xcconfig:1:1: error: unable
to open
               file (in target "Runner" in project "Runner")
               /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Flutter/Debug.xcconfig:1:1: error: unable
to open
               file (in target "Runner" in project "Runner")
               /Users/prasathsivanathan/Desktop/Projects/f/2/check/ios/Flutter/Debug.xcconfig:1:1: error: unable
to open
               file (in target "Runner" in project "Runner")
               warning: Capabilities for Signing & Capabilities may not function correctly because its
entitlements use a
               placeholder team ID. To resolve this, select a development team in the Runner editor. (in target
'Runner'
               from project 'Runner')
               warning: Unable to read contents of XCFileList '/Target Support
               Files/Pods-Runner/Pods-Runner-frameworks-Debug-output-files.xcfilelist' (in target 'Runner' from
project
               'Runner')
               error: Unable to load contents of file list: '/Target Support
               Files/Pods-Runner/Pods-Runner-frameworks-Debug-input-files.xcfilelist' (in target 'Runner' from
project
               'Runner')
               error: Unable to load contents of file list: '/Target Support
               Files/Pods-Runner/Pods-Runner-frameworks-Debug-output-files.xcfilelist' (in target 'Runner' from
project
               'Runner')

[  +33 ms] Could not build the application for the simulator.
[   +2 ms] Error launching application on iPhone 11.
[+1243 ms] "flutter run" took 9,965ms.
[  +22 ms]
           #0      throwToolExit (package:flutter_tools/src/base/common.dart:12:3)
           #1      RunCommand.runCommand (package:flutter_tools/src/commands/run.dart:655:9)
           <asynchronous suspension>
           #2      FlutterCommand.run.<anonymous closure>
(package:flutter_tools/src/runner/flutter_command.dart:1037:27)
           <asynchronous suspension>
           #3      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:152:19)
           <asynchronous suspension>
           #4      CommandRunner.runCommand (package:args/command_runner.dart:197:13)
           <asynchronous suspension>
           #5      FlutterCommandRunner.runCommand.<anonymous closure>
           (package:flutter_tools/src/runner/flutter_command_runner.dart:283:9)
           <asynchronous suspension>
           #6      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:152:19)
           <asynchronous suspension>
           #7      FlutterCommandRunner.runCommand
(package:flutter_tools/src/runner/flutter_command_runner.dart:239:5)
           <asynchronous suspension>
           #8      run.<anonymous closure>.<anonymous closure> (package:flutter_tools/runner.dart:62:9)
           <asynchronous suspension>
           #9      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:152:19)
           <asynchronous suspension>
           #10     main (package:flutter_tools/executable.dart:92:3)
           <asynchronous suspension>

[ +144 ms] ensureAnalyticsSent: 134ms
[   +1 ms] Running shutdown hooks
[        ] Shutdown hook priority 4
[   +1 ms] Shutdown hooks complete
[        ] exiting with code 1
-->

Prasaths-MacBook-Pro:ios prasathsivanathan$ flutter doctor -v
[✓] Flutter (Channel master, 2.1.0-11.0.pre.145, on macOS 11.2.2 20D80 darwin-arm, locale en-LK)
    • Flutter version 2.1.0-11.0.pre.145 at /Users/prasathsivanathan/Developer/flutter
    • Framework revision a0ba646408 (25 hours ago), 2021-03-05 22:09:03 -0500
    • Engine revision f751d04fa0
    • Dart version 2.13.0 (build 2.13.0-107.0.dev)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at /Users/prasathsivanathan/Library/Android/sdk
    • Platform android-30, build-tools 30.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode-beta.app/Contents/Developer
    • Xcode 12.5, Build version 12E5234g
    • CocoaPods version 1.10.1

[✗] Chrome - develop for the web (Cannot find Chrome executable at /Applications/Google
    Chrome.app/Contents/MacOS/Google Chrome)
    ! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.

[✓] Android Studio (version 4.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)

[✓] Connected device (1 available)
    • iPhone 11 (mobile) • 198FFE27-DFFF-4E0B-A854-199D463C730F • ios •
      com.apple.CoreSimulator.SimRuntime.iOS-14-5 (simulator)

! Doctor found issues in 1 category.

</details>

https://stackoverflow.com/a/66519272/5359340

Excuse me, has this problem been solved？


text:
Flexible RawScrollbar

Use case
I am trying to create the following scrollbar:

but this seems to not be possible in Flutter with the widget RawScrollbar. Currently there are only a few properties, which makes the scrollbar implementation non-flexible.
Proposal
Add the following properties to add more flexibility for the RawScrollbar widget:

hoveringThickness. The thickness of the scrollbar when the mouse is over it. This should be animated
backgroundColor. The color behind the scrollbar color.
pressingThumbColor. The color of the scrollbar when the user is pressing it
leading and trailing. This would be the "arrows"

These properties would make it easy to implement an scrollbar like the following:

CC @Piinks

+1 on this!

I would really like to be able to fully customize Flutter scroll bars, but I think that just adding new customization properties like thickness, backgroundColor, pressingThumbColor might never be enough to cover many possible scrollbar appearances.
For example, there is a draggable_scrollbar package which (as I know) has completely own scrollbar implementation developed from scratch.
IMHO it would be great in Flutter to separate scroll logic and scroll bar visual representation and to have ability to provide custom rendering for all scroll bar parts (thumb, track, arrows).

Some of this is already supported in the framework.
For these requested properties:

hoveringThickness. The thickness of the scrollbar when the mouse is over it. This should be animated
backgroundColor. The color behind the scrollbar color.
pressingThumbColor. The color of the scrollbar when the user is pressing it

These can already be achieved by using the material Scrollbar. That way you could use ScrollbarTheme to control these using MaterialStateProperties. We are transitioning to use these instead of having many many many parameters like hoverColor, pressedColor, xColor, yColor and so on and so forth.
So instead of providing a bunch of colors to the scrollbar, the framework provides the current MaterialStates of the Scrollbar and you return the color for the current state.
You can see this here, where the _trackColor (which I understand as the requested backgroundColor) is determined by the current state, MaterialState.hovered.
https://github.com/flutter/flutter/blob/71cb40f46ac318e0e59ae17b958c14fa7b030085/packages/flutter/lib/src/material/scrollbar.dart#L298
The same can be done for the hover  thickness:
https://github.com/flutter/flutter/blob/71cb40f46ac318e0e59ae17b958c14fa7b030085/packages/flutter/lib/src/material/scrollbar.dart#L326
And the thumb color:
https://github.com/flutter/flutter/blob/71cb40f46ac318e0e59ae17b958c14fa7b030085/packages/flutter/lib/src/material/scrollbar.dart#L258
These are all already available in ScrollbarTheme:
https://github.com/flutter/flutter/blob/71cb40f46ac318e0e59ae17b958c14fa7b030085/packages/flutter/lib/src/material/scrollbar_theme.dart#L83
https://github.com/flutter/flutter/blob/71cb40f46ac318e0e59ae17b958c14fa7b030085/packages/flutter/lib/src/material/scrollbar_theme.dart#L52
https://github.com/flutter/flutter/blob/71cb40f46ac318e0e59ae17b958c14fa7b030085/packages/flutter/lib/src/material/scrollbar_theme.dart#L76

I did experiment with a different kind of scrollbar widget when working on the RawScrollbar widget. It allowed the user to pass any widget for thumb/track/anchor/arrows, and arranged them together. Ultimately we decided to move forward with a non-breaking update to scrollbars, and focused on meeting the design specifications from Material Design.
There are some scrollbar packages that allow you to customize these features, like https://pub.dev/packages/draggable_scrollbar
Maybe I can find that prototype from a few months back and publish it as a package, it was pretty buggy I think, so it'll take a bit of tweaking. I think it was also very complex supporting all of the customization, and beyond the scope of what folks were asking for at the time. But in theory it could work. ;)

Oooh. I hadn't took a look at material's scrollbar implementation, and I didn't know this was possible to do. Knowing that makes it easier to implement the request above, since ig I can implement my own painter.
Either way, it'd still be really good to not depend on material and create desktop-like scrollbars. It feels a bit weird on flutter web, for example.

Chrome Default Scrollbar
Window's Scrollbar
Flutter Material Scrollbar

google.com
File Explorer
youtube.com

So, I could achieve the properties I requested. But the leading and trailing properties would be really useful.

Maybe I can find that prototype from a few months back and publish it as a package, it was pretty buggy I think, so it'll take a bit of tweaking. I think it was also very complex supporting all of the customization, and beyond the scope of what folks were asking for at the time. But in theory it could work. ;)

@Piinks Any news on this?

source: gharchive/issue

authors: HansMuller Piinks RedyAu bdlukaa roman-petrov

repo: flutter/flutter

license_type: permissive

license_source: github-api


text:
Problem with platform dependent AppBar with null-safety

This code is accepted without null safety, but gives an error with null safety: A value of type 'Widget' can't be assigned to a variable of type 'PreferredSizeWidget'.
    final PreferredSizeWidget appbar = Platform.isIOS
        ? CupertinoNavigationBar(
            middle: Text(
              'Personal Expenses ',
            ),
            trailing: Row(
              mainAxisSize: MainAxisSize.min,
              children: <Widget>[
                GestureDetector(
                  child: Icon(CupertinoIcons.add),
                  onTap: () {},
                )
              ],
            ),
          )
        : AppBar(
            title: Text(
              'Personal Expenses ',
              style: TextStyle(fontFamily: 'OpenSans'),
            ),
            actions: <Widget>[
              IconButton(
                icon: Icon(Icons.add),
                onPressed: () {},
              ),
            ],
          );

I forgot to add my version: Flutter (Channel stable, 2.0.5, on Microsoft Windows [Version 10.0.19041.928], locale en-GB)

With sdk: ">=2.12.0 <3.0.0":

flutter doctor -v
[✓] Flutter (Channel master, 2.3.0-1.0.pre.143, on Mac OS X 10.15.4 19E2269
    darwin-x64, locale en-GB)
    • Flutter version 2.3.0-1.0.pre.143 at
      /Users/dhs/documents/fluttersdk/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision aecd5e0302 (2 days ago), 2021-04-28 00:53:57 -0300
    • Engine revision 92ef7b59c8
    • Dart version 2.14.0 (build 2.14.0-48.0.dev)

[!] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.3, Build version 12C33
    ! CocoaPods 1.9.3 out of date (1.10.0 is recommended).
        CocoaPods is used to retrieve the iOS and macOS platform side's plugin
        code that responds to your plugin usage on the Dart side.
        Without CocoaPods, plugins will not work on iOS or macOS.
        For more info, see https://flutter.dev/platform-plugins
      To upgrade see
      https://guides.cocoapods.org/using/getting-started.html#installation for
      instructions.

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] VS Code (version 1.55.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.21.0

[✓] Connected device (4 available)
    • Darshan's iphone (mobile)  • 21150b119064aecc249dfcfe05e259197461ce23 •
      ios            • iOS 14.4.1
    • iPhone 12 Pro Max (mobile) • A5473606-0213-4FD8-BA16-553433949729     •
      ios            • com.apple.CoreSimulator.SimRuntime.iOS-14-3 (simulator)
    • macOS (desktop)            • macos                                    •
      darwin-x64     • Mac OS X 10.15.4 19E2269 darwin-x64
    • Chrome (web)               • chrome                                   •
      web-javascript • Google Chrome 90.0.4430.93

! Doctor found issues in 1 category.

To workaround the problem, wrap CupertinoNavigationBar in a PreferredSize widget.

The workaround seems undesirable as I have to specify the preferredSize. If I declare my appbar as dynamic I do not get a compile error.

The PreferredSizeWidget  interface defines a preferredSize getter which your dynamic appbar doesn't have. The compiler is trying to help out here :-)

But CupertinoNavigationBar has a preferredSize property...

So it does! In fact it implements ObstructingPreferredSizeWidget which is-a PreferredSizeWidget. The expression you've written shouldn't require a workaround ... looking into it

Right :) As I wrote, this code works without null safety.

This could be a bug in dart's type inference...
  final PreferredSizeWidget a = CupertinoNavigationBar();
  final PreferredSizeWidget b = AppBar();

  // No Error.
  final PreferredSizeWidget appbar = Platform.isIOS ? a : b;
  final PreferredSizeWidget appbar2 = Platform.isIOS ? a : AppBar();
  final PreferredSizeWidget appbar3 = Platform.isIOS ? CupertinoNavigationBar() : b;

  final PreferredSizeWidget appBar4;
  if (Platform.isIOS) {
    appBar4 = CupertinoNavigationBar();
  } else {
    appBar4 = AppBar();
  }

  // Error.
  final PreferredSizeWidget appbar5 = Platform.isIOS ? CupertinoNavigationBar() : AppBar();

I'll see if I can reproduce this outside the flutter framework. In the meantime, I'd go with the appBar4 example from above as a functionally equivalent work-around.

Submitted https://github.com/dart-lang/sdk/issues/45941, let's see what the dart team thinks.

As was explained in https://github.com/dart-lang/sdk/issues/45941#issuecomment-833891751 this is working as designed from Dart's perspective.
It also gave a simple work around of using an explicit case:
final PreferredSizeWidget appbar5 = (Platform.isIOS ? CupertinoNavigationBar() : AppBar()) as PreferredSizeWidget;

Since there's not much we can do about this on the Flutter side, I am going to close this issue.

authors: HansMuller darshankawar goderbauer pohara60


text:
Regression in debug_full_compile_millis for iOS compile time benchmarks

See https://flutter-flutter-perf.skia.org/e/?begin=1627670324&end=1627940405&keys=X2fa997fe887b92a9e2bf8d4f4032bec4&num_commits=50&request_type=1&xbaroffset=25271
My best guess is this PR: https://github.com/flutter/flutter/pull/87362
Regression is in the ~10% range.
@jmagman

@zanderso The regression is expected, I don't see another way to solve https://github.com/flutter/flutter/issues/85713.

Closing per comment from @jmagman

authors: jmagman zanderso


text:
Problems with changing urls and windows with pending modifications

Hello,
Suppose I have a window with a form, that form has been modified, so the modifications are pending to be saved.
Now I open another window changing the url and therefore the current one (which has the modifications) closes, how can I put an alert message to prevent or accept navigating to the new url and accept or cancel the pending modifications?
I have tried to do it through the standard libraries and also several libraries, but without success.
Is there a standardized method to control this type of situation?
If it does not exist, you should include standard events to control these types of circumstances, as other frameworks do, for example, an onCloseQuery, onClose, ...
Thanks for your help.
Regards,
Jose

HI @Josua2012
Please see https://flutter.dev/community for resources and asking questions like this,
you may also get some help if you post it on Stack Overflow and if you need help with your code, please see https://www.reddit.com/r/flutterhelp/
Closing, as this isn't an issue with Flutter itself. If you disagree, please write in the comments and I will reopen it.
Thank you


text:
The newly created project cannot be packaged aar

flutter create test
新创建一个工程
在pubspec.yaml中增加module相关配置
  module:
    androidX: true
    androidPackage: com.test.test

然后执行build aar进行安卓的打包
报错
translated using google translate
flutter create test
Create a new project
Add module related configuration in pubspec.yaml
 module:
    androidX: true
    androidPackage: com.test.test

Then execute build aar to package Android
Report an error
flutter build aar
Running "flutter pub get" in test_android...                       653ms

💪 Building with sound null safety 💪

Running Gradle task 'assembleAarDebug'...                        1,149ms

FAILURE: Build failed with an exception.

* Where:
Initialization script '/Users/shimoxuan/tool/flutter/packages/flutter_tools/gradle/aar_init_script.gradle' line: 156

* What went wrong:
Failed to notify build listener.
> assert moduleProject != null
         |             |
         null          false

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 764ms

Gradle task assembleAarDebug failed with exit code 1.

Hi @cowcomic, Thanks for filing the issue. to build aar files you need to create a module project
flutter create -t module --org com.example my_flutter

and not a normal flutter project flutter create hello.
Please see the docs for more details https://docs.flutter.dev/development/add-to-app/android/project-setup
related to https://github.com/flutter/flutter/issues/42214
Closing as working as intended.

Hi @cowcomic, Thanks for filing the issue. to build aar files you need to create a module project
flutter create -t module --org com.example my_flutter

and not a normal flutter project flutter create hello.
Please see the docs for more details https://docs.flutter.dev/development/add-to-app/android/project-setup
related to #42214
Closing as working as intended.

in document "add to android" and "add to ios" use different command
for android
flutter create -t module --org com.example my_flutter

for ios
flutter create --template module my_flutter

our flutter project need to add both android and ios
how can i create one flutter project for adding to different platform

our flutter project need to add both android and ios

@cowcomic  both commands are same first one specifies a bundle identifier and second one doesn't

authors: cowcomic maheshmnj


text:
[Flutter Web on IOS device] bug with BorderRadius using image

Steps to Reproduce

Using flutterWeb build.
run it , and use IOS browser ( safari or Chrome : same result)
Bug if using DecorationImage with BorderRadius
Test with IOS simulator or real device : same bug

Actual results:

Code

import 'package:flutter/material.dart';

class CgvScreen extends StatelessWidget {
  const CgvScreen({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(),
        body: Container(
          height: 250,
          decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(30),
              //color: Colors.green,
              image: DecorationImage(
                  image: AssetImage('images/flutter_img.png'),
                  fit: BoxFit.cover),
              boxShadow: [
                BoxShadow(
                    color: Colors.grey, blurRadius: 10, offset: Offset(0, 10))
              ]),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [Container()],
          ),
        ));
  }
}

Logs

[✓] Flutter (Channel stable, 2.8.1, on macOS 11.6.1 20G224 darwin-arm, locale fr-NC)
    • Flutter version 2.8.1 at /Users/philippededieu/Documents/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 77d935af4d (4 weeks ago), 2021-12-16 08:37:33 -0800
    • Engine revision 890a5fca2e
    • Dart version 2.15.1

[!] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    • Android SDK at /Users/philippededieu/Library/Android/sdk
    ✗ cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    ✗ Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/macos#android-setup for more details.

[✓] Xcode - develop for iOS and macOS (Xcode 13.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.11.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2020.3)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.10+0-b96-7249189)

[!] Android Studio
    • Android Studio at /Users/philippededieu/Downloads/Android Studio Preview.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    ✗ Unable to find bundled Java version.
    • Try updating or re-installing Android Studio.

[✓] VS Code (version 1.63.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.32.0

[✓] Connected device (3 available)
    • iPhone de Serena (mobile) • 1501fe595ca90cd14552c1ef9b781ec5acda6855 • ios            • iOS 15.1 19B74
    • iPhone 12 (mobile)        • A407296A-E987-4B80-9BF1-483D2145B719     • ios            • com.apple.CoreSimulator.SimRuntime.iOS-15-0 (simulator)
    • Chrome (web)              • chrome                                   • web-javascript • Google Chrome 97.0.4692.71

Hi @philhp, Thanks for filing the issue. I am able to replicate the issue on both stable and the master channel

IOS Web
IOS App

flutter doctor -v
[✓] Flutter (Channel master, 2.9.0-1.0.pre.363, on macOS 12.1 21C52 darwin-arm, locale en-GB)
    • Flutter version 2.9.0-1.0.pre.363 at /Users/mahesh/Documents/flutter_master
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 9e9a728667 (3 days ago), 2022-01-14 09:40:11 +0800
    • Engine revision f121c1fe68
    • Dart version 2.17.0 (build 2.17.0-11.0.dev)
    • DevTools version 2.9.2

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    • Android SDK at /Users/mahesh/Library/Android/sdk
    • Platform android-31, build-tools 31.0.0
    • ANDROID_HOME = /Users/mahesh/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 13.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.10.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)

[✓] IntelliJ IDEA Community Edition (version 2021.2.1)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    • Flutter plugin version 60.1.4
    • Dart plugin version 212.5080.8

[✓] VS Code (version 1.63.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.32.0

[✓] Connected device (3 available)
    • iPhone 12 (mobile) • A047BAB5-CBE0-4DAF-962E-01A35B593FB5 • ios            • com.apple.CoreSimulator.SimRuntime.iOS-15-0 (simulator)
    • macOS (desktop)    • macos                                • darwin-arm64   • macOS 12.1 21C52 darwin-arm
    • Chrome (web)       • chrome                               • web-javascript • Google Chrome 97.0.4692.71

[✓] HTTP Host Availability
    • All required HTTP hosts are available

• No issues found!

[✓] Flutter (Channel stable, 2.8.1, on macOS 12.1 21C52 darwin-arm, locale en-GB)
    • Flutter version 2.8.1 at /Users/mahesh/Documents/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 77d935af4d (5 weeks ago), 2021-12-16 08:37:33 -0800
    • Engine revision 890a5fca2e
    • Dart version 2.15.1

[✓] Android toolchain - develop for Android devices (Android SDK version 31.0.0)
    • Android SDK at /Users/mahesh/Library/Android/sdk
    • Platform android-31, build-tools 31.0.0
    • ANDROID_HOME = /Users/mahesh/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 13.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • CocoaPods version 1.10.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 4.2)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.8+10-b944.6916264)

[✓] IntelliJ IDEA Community Edition (version 2021.2.1)
    • IntelliJ at /Applications/IntelliJ IDEA CE.app
    • Flutter plugin version 60.1.4
    • Dart plugin version 212.5080.8

[✓] VS Code (version 1.63.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.32.0

[✓] Connected device (3 available)
    • iPhone 12 (mobile) • A047BAB5-CBE0-4DAF-962E-01A35B593FB5 • ios            • com.apple.CoreSimulator.SimRuntime.iOS-15-0 (simulator)
    • macOS (desktop)    • macos                                • darwin-arm64   • macOS 12.1 21C52 darwin-arm
    • Chrome (web)       • chrome                               • web-javascript • Google Chrome 97.0.4692.71

• No issues found!

authors: maheshmnj philhp