[documentation][windows plugin] Some objects should not be used from other threads

[fawdlstty]

Steps to Reproduce

I wanted to try the Windows-side plugin for binary data communication with Flutter, and I used EventChannel and ran into two problems associated with it.

1. Download and rename:

• test_camera.7z.001.txt -> test_camera.7z.001
• test_camera.7z.002.txt -> test_camera.7z.002

2. Unzipper, and go to test_camera\example\windows\flutter\ephemeral\.plugin_symlinks, create new link to root path

• or go to test_camera\example and run flutter build windows to automatic generation this link file

3. modify test_camera\windows\test_camera_plugin.cpp 38 line, remove or change to vcpkg install path
4. modify test_camera\windows\test_camera_plugin.cpp 187 line, change path to test_camera\screenhosts directory real path
5. flutter run -d windows
6. question 1: Then software memory usage continues to increase
7. modify test_camera\windows\test_camera_plugin.cpp 66 line to return nullptr;
8. flutter run -d windows
9. question 2: Then the software will not be able to start, run that crash, no error message

Expected results: no memory leaks, no craches

Actual results: memory leaks and crashes

Logs

PS E:\projects_flutter\test_camera\example> flutter run -d windows --verbose
[ +110 ms] executing: [E:\GitHub\Flutter/] git -c log.showSignature=false log -n 1 --pretty=format:%H
[ +144 ms] Exit code 0 from: git -c log.showSignature=false log -n 1 --pretty=format:%H
[   +1 ms] 79b49b9e1057f90ebf797725233c6b311722de69
[   +1 ms] executing: [E:\GitHub\Flutter/] git tag --points-at 79b49b9e1057f90ebf797725233c6b311722de69
[ +130 ms] Exit code 0 from: git tag --points-at 79b49b9e1057f90ebf797725233c6b311722de69
[        ] 1.26.0-17.2.pre
[  +54 ms] executing: [E:\GitHub\Flutter/] git rev-parse --abbrev-ref --symbolic @{u}
[  +74 ms] Exit code 0 from: git rev-parse --abbrev-ref --symbolic @{u}
[        ] origin/dev
[        ] executing: [E:\GitHub\Flutter/] git ls-remote --get-url origin
[  +66 ms] Exit code 0 from: git ls-remote --get-url origin
[        ] https://gitee.com/mirrors/Flutter
[ +418 ms] Unable to locate an Android SDK.
[   +5 ms] executing: [E:\GitHub\Flutter/] git rev-parse --abbrev-ref HEAD
[  +67 ms] Exit code 0 from: git rev-parse --abbrev-ref HEAD
[        ] dev
[ +105 ms] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[   +5 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[ +173 ms] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[   +7 ms] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[        ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[ +171 ms] Skipping pub get: version match.
[  +70 ms] Found plugin test_camera at E:\projects_flutter\test_camera\
[ +133 ms] Found plugin test_camera at E:\projects_flutter\test_camera\
[ +143 ms] Initializing file store
[  +11 ms] Skipping target: gen_localizations
[   +7 ms] complete
[   +7 ms] Launching lib\main.dart on Windows in debug mode...
[   +8 ms] E:\GitHub\Flutter\bin\cache\dart-sdk\bin\dart.exe --disable-dart-dev E:\GitHub\Flutter\bin\cache\artifacts\engine\windows-x64\frontend_server.dart.snapshot --sdk-root
E:\GitHub\Flutter\bin\cache\artifacts\engine\common\flutter_patched_sdk/ --incremental --target=flutter --debugger-module-names --experimental-emit-debug-metadata -DFLUTTER_WEB_AUTO_DETECT=true --output-dill
C:\Users\ADMINI~1\AppData\Local\Temp\flutter_tools.c83862db\flutter_tool.b7755f0\app.dill --packages E:\projects_flutter\test_camera\example\.dart_tool\package_config.json -Ddart.vm.profile=false
-Ddart.vm.product=false --enable-asserts --track-widget-creation --filesystem-scheme org-dartlang-root --initialize-from-dill build\c075001b96339384a97db4862b8ab8db.cache.dill.track.dill
[  +41 ms] executing: C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe -format json -products * -utf8 -latest -version 16 -requires Microsoft.VisualStudio.Workload.NativeDesktop
Microsoft.VisualStudio.Component.VC.Tools.x86.x64 Microsoft.VisualStudio.Component.VC.CMake.Project
[  +73 ms] Exit code 0 from: C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe -format json -products * -utf8 -latest -version 16 -requires Microsoft.VisualStudio.Workload.NativeDesktop
Microsoft.VisualStudio.Component.VC.Tools.x86.x64 Microsoft.VisualStudio.Component.VC.CMake.Project
[   +2 ms] [
             {
               "instanceId": "fcf4cc7d",
               "installDate": "2020-12-24T03:15:35Z",
               "installationName": "VisualStudio/16.8.4+30907.101",
               "installationPath": "E:\\Software\\Microsoft Visual Studio\\2019\\Community",
               "installationVersion": "16.8.30907.101",
               "productId": "Microsoft.VisualStudio.Product.Community",
               "productPath": "E:\\Software\\Microsoft Visual Studio\\2019\\Community\\Common7\\IDE\\devenv.exe",
               "state": 19974282280959999,
               "isComplete": true,
               "isLaunchable": true,
               "isPrerelease": false,
               "isRebootRequired": false,
               "displayName": "Visual Studio Community 2019",
               "description": "功能强大的 IDE，供学生、开放源代码参与者和个人免费使用",
               "channelId": "VisualStudio.16.Release",
               "channelUri": "https://aka.ms/vs/16/release/channel",
               "enginePath": "C:\\Program Files (x86)\\Microsoft Visual Studio\\Installer\\resources\\app\\ServiceHub\\Services\\Microsoft.VisualStudio.Setup.Service",
               "releaseNotes": "https://go.microsoft.com/fwlink/?LinkId=660893#16.8.4",
               "thirdPartyNotices": "https://go.microsoft.com/fwlink/?LinkId=660909",
               "updateDate": "2021-01-20T09:17:55.9151021Z",
               "catalog": {
                 "buildBranch": "d16.8",
                 "buildVersion": "16.8.30907.101",
                 "id": "VisualStudio/16.8.4+30907.101",
                 "localBuild": "build-lab",
                 "manifestName": "VisualStudio",
                 "manifestType": "installer",
                 "productDisplayVersion": "16.8.4",
                 "productLine": "Dev16",
                 "productLineVersion": "2019",
                 "productMilestone": "RTW",
                 "productMilestoneIsPreRelease": "False",
                 "productName": "Visual Studio",
                 "productPatchVersion": "4",
                 "productPreReleaseMilestoneSuffix": "1.0",
                 "productSemanticVersion": "16.8.4+30907.101",
                 "requiredEngineVersion": "2.8.3267.30329"
               },
               "properties": {
                 "campaignId": "1132502067.1570503666",
                 "canceled": "0",
                 "channelManifestId": "VisualStudio.16.Release/16.8.4+30907.101",
                 "defaultProgram": "VisualStudio.fcf4cc7d",
                 "nickname": "",
                 "setupEngineFilePath": "C:\\Program Files (x86)\\Microsoft Visual Studio\\Installer\\vs_installershell.exe"
               }
             }
           ]
[   +5 ms] Building Windows application...
[ +146 ms] <- compile package:test_camera_example/main.dart
[   +3 ms] executing: E:\Software\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe -S E:\projects_flutter\test_camera\example\windows -B build\windows -G
Visual Studio 16 2019
[ +274 ms] -- Selecting Windows SDK version 10.0.18362.0 to target Windows 6.1.7601.
[  +68 ms] -- Configuring done
[ +175 ms] -- Generating done
[  +21 ms] -- Build files have been written to: E:/projects_flutter/test_camera/example/build/windows
[  +11 ms] executing: E:\Software\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe --build build\windows --config Debug --target INSTALL --verbose
[ +410 ms] 用于 .NET Framework 的 Microsoft (R) 生成引擎版本 16.8.3+39993bd9d
[   +3 ms] 版权所有(C) Microsoft Corporation。保留所有权利。
[ +156 ms] 生成启动时间为 2021/2/20 星期六 18:43:47。
[ +462 ms] 节点 1 上的项目“E:\projects_flutter\test_camera\example\build\windows\INSTALL.vcxproj”(默认目标)。
[   +1 ms] 项目“E:\projects_flutter\test_camera\example\build\windows\INSTALL.vcxproj”(1)正在节点 1 上生成“E:\projects_flutter\test_camera\example\build\windows\ZERO_CHECK.vcxproj”(2) (默认目标)。
[  +11 ms] PrepareForBuild:
[   +1 ms]   正在创建目录“x64\Debug\ZERO_CHECK\”。
[        ]   正在创建目录“x64\Debug\ZERO_CHECK\ZERO_CHECK.tlog\”。
[   +6 ms] InitializeBuildStatus:
[  +29 ms]   正在创建“x64\Debug\ZERO_CHECK\ZERO_CHECK.tlog\unsuccessfulbuild”，因为已指定“AlwaysCreate”。
[ +361 ms] CustomBuild:
[   +7 ms]   Checking Build System
[ +263 ms] FinalizeBuildStatus:
[   +3 ms]   正在删除文件“x64\Debug\ZERO_CHECK\ZERO_CHECK.tlog\unsuccessfulbuild”。
[   +2 ms]   正在对“x64\Debug\ZERO_CHECK\ZERO_CHECK.tlog\ZERO_CHECK.lastbuildstate”执行 Touch 任务。
[        ] 已完成生成项目“E:\projects_flutter\test_camera\example\build\windows\ZERO_CHECK.vcxproj”(默认目标)的操作。
[ +203 ms] 项目“E:\projects_flutter\test_camera\example\build\windows\INSTALL.vcxproj”(1)正在节点 1 上生成“E:\projects_flutter\test_camera\example\build\windows\ALL_BUILD.vcxproj”(3) (默认目标)。
[   +2 ms] 项目“E:\projects_flutter\test_camera\example\build\windows\ALL_BUILD.vcxproj”(3)正在节点 1 上生成“E:\projects_flutter\test_camera\example\build\windows\flutter\flutter_wrapper_app.vcxproj”(4) (默认目标)
[   +1 ms] 项目“E:\projects_flutter\test_camera\example\build\windows\flutter\flutter_wrapper_app.vcxproj”(4)正在节点 1 上生成“E:\projects_flutter\test_camera\example\build\windows\flutter\flutter_assemble.vcxproj”(5)
(默认目标)。
[   +3 ms] PrepareForBuild:
[   +1 ms]   正在创建目录“x64\Debug\flutter_assemble\”。
[   +2 ms]   正在创建目录“x64\Debug\flutter_assemble\flutter_assemble.tlog\”。
[   +1 ms] InitializeBuildStatus:
[   +4 ms]   正在创建“x64\Debug\flutter_assemble\flutter_assemble.tlog\unsuccessfulbuild”，因为已指定“AlwaysCreate”。
[   +9 ms] CustomBuild:
[        ]
“‘E:\projects_flutter\test_camera\example\build\windows\CMakeFiles\b1e83b2989460a1b757d2cf65df795cc\flutter_assemble.rule’的生成依赖于由‘E:\projects_flutter\test_camera\example\build\windows\CMakeFiles\cb5040116b49e647cd
5e1519e002f3d8\flutter_windows.dll.rule’的生成所产生的‘E:\PROJECTS_FLUTTER\TEST_CAMERA\EXAMPLE\WINDOWS\FLUTTER\EPHEMERAL\FLUTTER_WINDOWS.DLL’。无法并行生成项。”
[ +209 ms]   Generating E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/flutter_windows.dll, E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/flutter_export.h,
E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/flutter_windows.h, E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/flutter_messenger.h,
E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/flutter_plugin_registrar.h, E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/flutter_texture_registrar.h,
E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/cpp_client_wrapper/core_implementations.cc, E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/cpp_client_wrapper/standard_codec.cc,
E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/cpp_client_wrapper/plugin_registrar.cc, E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/cpp_client_wrapper/flutter_engine.cc,
E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/cpp_client_wrapper/flutter_view_controller.cc, _phony_
[+2505 ms]   [ +109 ms] executing: [E:\GitHub\Flutter/] git -c log.showSignature=false log -n 1 --pretty=format:%H
[ +159 ms]   [ +195 ms] Exit code 0 from: git -c log.showSignature=false log -n 1 --pretty=format:%H
[        ]   [        ] 79b49b9e1057f90ebf797725233c6b311722de69
[        ]   [        ] executing: [E:\GitHub\Flutter/] git tag --points-at 79b49b9e1057f90ebf797725233c6b311722de69
[ +163 ms]   [ +164 ms] Exit code 0 from: git tag --points-at 79b49b9e1057f90ebf797725233c6b311722de69
[   +1 ms]   [        ] 1.26.0-17.2.pre
[  +56 ms]   [  +57 ms] executing: [E:\GitHub\Flutter/] git rev-parse --abbrev-ref --symbolic @{u}
[ +133 ms]   [ +133 ms] Exit code 0 from: git rev-parse --abbrev-ref --symbolic @{u}
[   +3 ms]   [        ] origin/dev
[        ]   [        ] executing: [E:\GitHub\Flutter/] git ls-remote --get-url origin
[ +124 ms]   [ +126 ms] Exit code 0 from: git ls-remote --get-url origin
[   +2 ms]   [        ] https://gitee.com/mirrors/Flutter
[ +592 ms]   [ +594 ms] Unable to locate an Android SDK.
[   +4 ms]   [   +5 ms] executing: [E:\GitHub\Flutter/] git rev-parse --abbrev-ref HEAD
[ +122 ms]   [ +120 ms] Exit code 0 from: git rev-parse --abbrev-ref HEAD
[   +1 ms]   [   +2 ms] dev
[ +115 ms]   [ +114 ms] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[   +2 ms]   [   +6 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[   +1 ms]   [        ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[ +138 ms]   [ +140 ms] Artifact Instance of 'MaterialFonts' is not required, skipping update.
[   +1 ms]   [        ] Artifact Instance of 'GradleWrapper' is not required, skipping update.
[   +1 ms]   [        ] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'FlutterSdk' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[   +1 ms]   [        ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[   +1 ms]   [        ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'FontSubsetArtifacts' is not required, skipping update.
[        ]   [        ] Artifact Instance of 'PubDependencies' is not required, skipping update.
[ +104 ms]   [ +115 ms] Initializing file store
[  +22 ms]   [  +20 ms] Done initializing file store
[  +55 ms]   [  +57 ms] Skipping target: gen_localizations
[+3262 ms]   [+3263 ms] unpack_windows: Starting due to {InvalidatedReason.inputChanged}
[+1083 ms]   [+1083 ms] Skipping target: kernel_snapshot
[   +4 ms]   [   +3 ms] unpack_windows: Complete
[+1731 ms]   [+1731 ms] debug_bundle_windows_assets: Starting due to {InvalidatedReason.outputMissing}
[ +203 ms]   [ +204 ms] debug_bundle_windows_assets: Complete
[ +286 ms]   [ +286 ms] Persisting file store
[  +30 ms]   [  +14 ms] Done persisting file store
[   +1 ms]   [  +14 ms] build succeeded.
[  +12 ms]   [  +15 ms] "flutter assemble" took 6,971ms.
[ +290 ms]   [ +290 ms] ensureAnalyticsSent: 285ms
[   +1 ms]   [   +1 ms] Running shutdown hooks
[        ]   [        ] Shutdown hooks complete
[        ]   [        ] exiting with code 0
[ +237 ms]   Building Custom Rule E:/projects_flutter/test_camera/example/windows/flutter/CMakeLists.txt
[ +184 ms] FinalizeBuildStatus:
[        ]   正在删除文件“x64\Debug\flutter_assemble\flutter_assemble.tlog\unsuccessfulbuild”。
[        ]   正在对“x64\Debug\flutter_assemble\flutter_assemble.tlog\flutter_assemble.lastbuildstate”执行 Touch 任务。
[        ] 已完成生成项目“E:\projects_flutter\test_camera\example\build\windows\flutter\flutter_assemble.vcxproj”(默认目标)的操作。
[   +4 ms] PrepareForBuild:
[        ]   正在创建目录“flutter_wrapper_app.dir\Debug\”。
[   +2 ms]   正在创建目录“E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\”。
[        ]   正在创建目录“flutter_wrapper_app.dir\Debug\flutter_.03C864A7.tlog\”。
[   +2 ms] InitializeBuildStatus:
[        ]   正在创建“flutter_wrapper_app.dir\Debug\flutter_.03C864A7.tlog\unsuccessfulbuild”，因为已指定“AlwaysCreate”。
[ +155 ms] CustomBuild:
[        ]   Building Custom Rule E:/projects_flutter/test_camera/example/windows/flutter/CMakeLists.txt
[ +135 ms] VcpkgTripletSelection:
[        ]   Using triplet "x64-windows" from "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\"
[  +49 ms] ClCompile:
[   +3 ms]   E:\Software\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\bin\HostX64\x64\CL.exe /c /IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\include
/IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral /I"D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\include" /Zi /nologo /W4 /WX /diagnostics:column /Od /Ob0 /D WIN32
/D _WINDOWS /D _HAS_EXCEPTIONS=0 /D _DEBUG /D UNICODE /D _UNICODE /D "CMAKE_INTDIR=\"Debug\"" /D _UNICODE /D UNICODE /Gm- /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Zc:inline /GR /std:c++17
/Fo"flutter_wrapper_app.dir\Debug\\" /Fd"flutter_wrapper_app.dir\Debug\flutter_wrapper_app.pdb" /Gd /TP /wd4100 /errorReport:queue
E:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\core_implementations.cc E:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\standard_codec.cc
E:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\flutter_engine.cc
E:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\flutter_view_controller.cc
[ +277 ms]   core_implementations.cc
[+1129 ms]   standard_codec.cc
[+1313 ms]   flutter_engine.cc
[+1372 ms]   flutter_view_controller.cc
[+1339 ms]   正在生成代码...
[ +505 ms] Lib:
[   +1 ms]   E:\Software\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\bin\HostX64\x64\Lib.exe /OUT:"E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_app.lib"
/NOLOGO /MACHINE:X64  /machine:x64 flutter_wrapper_app.dir\Debug\core_implementations.obj
[   +1 ms]   flutter_wrapper_app.dir\Debug\standard_codec.obj
[        ]   flutter_wrapper_app.dir\Debug\flutter_engine.obj
[        ]   flutter_wrapper_app.dir\Debug\flutter_view_controller.obj
[ +480 ms]   flutter_wrapper_app.vcxproj -> E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_app.lib
[  +11 ms] AppLocalFromInstalled:
[        ]   pwsh.exe -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_app.lib" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"flutter_wrapper_app.dir\Debug\flutter_.03C864A7.tlog\flutter_wrapper_app.write.1u.tlog" "flutter_wrapper_app.dir\Debug\vcpkg.applocal.log"
[ +177 ms]   'pwsh.exe' is not recognized as an internal or external command,
[        ]   operable program or batch file.
[   +3 ms]   命令“pwsh.exe -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_app.lib" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"flutter_wrapper_app.dir\Debug\flutter_.03C864A7.tlog\flutter_wrapper_app.write.1u.tlog" "flutter_wrapper_app.dir\Debug\vcpkg.applocal.log"”已退出，代码为 9009。
[   +4 ms]   "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_app.lib" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"flutter_wrapper_app.dir\Debug\flutter_.03C864A7.tlog\flutter_wrapper_app.write.1u.tlog" "flutter_wrapper_app.dir\Debug\vcpkg.applocal.log"
[+1724 ms] CopyFilesToOutputDirectory:
[        ]
正在将文件从“E:\projects_flutter\test_camera\example\build\windows\flutter\flutter_wrapper_app.dir\Debug\flutter_wrapper_app.pdb”复制到“E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_ap
p.pdb”。
[   +5 ms] FinalizeBuildStatus:
[        ]   正在删除文件“flutter_wrapper_app.dir\Debug\flutter_.03C864A7.tlog\unsuccessfulbuild”。
[   +1 ms]   正在对“flutter_wrapper_app.dir\Debug\flutter_.03C864A7.tlog\flutter_wrapper_app.lastbuildstate”执行 Touch 任务。
[   +1 ms] 已完成生成项目“E:\projects_flutter\test_camera\example\build\windows\flutter\flutter_wrapper_app.vcxproj”(默认目标)的操作。
[  +70 ms] 项目“E:\projects_flutter\test_camera\example\build\windows\ALL_BUILD.vcxproj”(3)正在节点 1 上生成“E:\projects_flutter\test_camera\example\build\windows\flutter\flutter_wrapper_plugin.vcxproj”(6) (默认目标)。
[        ] PrepareForBuild:
[        ]   正在创建目录“flutter_wrapper_plugin.dir\Debug\”。
[   +2 ms]   正在创建目录“flutter_wrapper_plugin.dir\Debug\flutter_.F69361AC.tlog\”。
[   +2 ms] InitializeBuildStatus:
[   +1 ms]   正在创建“flutter_wrapper_plugin.dir\Debug\flutter_.F69361AC.tlog\unsuccessfulbuild”，因为已指定“AlwaysCreate”。
[ +155 ms] CustomBuild:
[        ]   Building Custom Rule E:/projects_flutter/test_camera/example/windows/flutter/CMakeLists.txt
[ +164 ms] VcpkgTripletSelection:
[        ]   Using triplet "x64-windows" from "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\"
[   +5 ms] ClCompile:
[  +10 ms]   E:\Software\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\bin\HostX64\x64\CL.exe /c /IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\include
/IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral /I"D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\include" /Zi /nologo /W4 /WX /diagnostics:column /Od /Ob0 /D WIN32
/D _WINDOWS /D _HAS_EXCEPTIONS=0 /D _DEBUG /D UNICODE /D _UNICODE /D "CMAKE_INTDIR=\"Debug\"" /D _UNICODE /D UNICODE /Gm- /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Zc:inline /GR /std:c++17
/Fo"flutter_wrapper_plugin.dir\Debug\\" /Fd"flutter_wrapper_plugin.dir\Debug\flutter_wrapper_plugin.pdb" /Gd /TP /wd4100 /errorReport:queue
E:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\core_implementations.cc E:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\standard_codec.cc
E:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\plugin_registrar.cc
[ +280 ms]   core_implementations.cc
[ +871 ms]   standard_codec.cc
[+1352 ms]   plugin_registrar.cc
[ +817 ms]   正在生成代码...
[ +403 ms] Lib:
[        ]   E:\Software\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\bin\HostX64\x64\Lib.exe
/OUT:"E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_plugin.lib" /NOLOGO /MACHINE:X64  /machine:x64 flutter_wrapper_plugin.dir\Debug\core_implementations.obj
[        ]   flutter_wrapper_plugin.dir\Debug\standard_codec.obj
[   +1 ms]   flutter_wrapper_plugin.dir\Debug\plugin_registrar.obj
[ +512 ms]   flutter_wrapper_plugin.vcxproj -> E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_plugin.lib
[   +5 ms] AppLocalFromInstalled:
[        ]   pwsh.exe -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_plugin.lib" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"flutter_wrapper_plugin.dir\Debug\flutter_.F69361AC.tlog\flutter_wrapper_plugin.write.1u.tlog" "flutter_wrapper_plugin.dir\Debug\vcpkg.applocal.log"
[ +170 ms]   'pwsh.exe' is not recognized as an internal or external command,
[        ]   operable program or batch file.
[   +2 ms]   命令“pwsh.exe -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_plugin.lib" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"flutter_wrapper_plugin.dir\Debug\flutter_.F69361AC.tlog\flutter_wrapper_plugin.write.1u.tlog" "flutter_wrapper_plugin.dir\Debug\vcpkg.applocal.log"”已退出，代码为 9009。
[   +4 ms]   "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrapper_plugin.lib" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"flutter_wrapper_plugin.dir\Debug\flutter_.F69361AC.tlog\flutter_wrapper_plugin.write.1u.tlog" "flutter_wrapper_plugin.dir\Debug\vcpkg.applocal.log"
[+1706 ms] CopyFilesToOutputDirectory:
[   +1 ms]
正在将文件从“E:\projects_flutter\test_camera\example\build\windows\flutter\flutter_wrapper_plugin.dir\Debug\flutter_wrapper_plugin.pdb”复制到“E:\projects_flutter\test_camera\example\build\windows\flutter\Debug\flutter_wrap
per_plugin.pdb”。
[   +3 ms] FinalizeBuildStatus:
[        ]   正在删除文件“flutter_wrapper_plugin.dir\Debug\flutter_.F69361AC.tlog\unsuccessfulbuild”。
[        ]   正在对“flutter_wrapper_plugin.dir\Debug\flutter_.F69361AC.tlog\flutter_wrapper_plugin.lastbuildstate”执行 Touch 任务。
[   +1 ms] 已完成生成项目“E:\projects_flutter\test_camera\example\build\windows\flutter\flutter_wrapper_plugin.vcxproj”(默认目标)的操作。
[ +133 ms] 项目“E:\projects_flutter\test_camera\example\build\windows\ALL_BUILD.vcxproj”(3)正在节点 1 上生成“E:\projects_flutter\test_camera\example\build\windows\runner\test_camera_example.vcxproj”(7) (默认目标)。
[        ] 项目“E:\projects_flutter\test_camera\example\build\windows\runner\test_camera_example.vcxproj”(7)正在节点 1
上生成“E:\projects_flutter\test_camera\example\build\windows\plugins\test_camera\test_camera_plugin.vcxproj”(8) (默认目标)。
[        ] PrepareForBuild:
[        ]   正在创建目录“test_camera_plugin.dir\Debug\”。
[   +1 ms]   正在创建目录“E:\projects_flutter\test_camera\example\build\windows\plugins\test_camera\Debug\”。
[        ]   正在创建目录“test_camera_plugin.dir\Debug\test_cam.21000FB7.tlog\”。
[   +2 ms] InitializeBuildStatus:
[        ]   正在创建“test_camera_plugin.dir\Debug\test_cam.21000FB7.tlog\unsuccessfulbuild”，因为已指定“AlwaysCreate”。
[ +163 ms] CustomBuild:
[        ]   Building Custom Rule E:/projects_flutter/test_camera/example/windows/flutter/ephemeral/.plugin_symlinks/test_camera/windows/CMakeLists.txt
[ +132 ms] VcpkgTripletSelection:
[        ]   Using triplet "x64-windows" from "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\"
[   +7 ms] ClCompile:
[        ]   E:\Software\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\bin\HostX64\x64\CL.exe /c /IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral
/IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\include /I"D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\include" /Zi /nologo /W4 /WX
/diagnostics:column /Od /Ob0 /D WIN32 /D _WINDOWS /D _HAS_EXCEPTIONS=0 /D _DEBUG /D FLUTTER_PLUGIN_IMPL /D UNICODE /D _UNICODE /D "CMAKE_INTDIR=\"Debug\"" /D test_camera_plugin_EXPORTS /D _WINDLL /D _UNICODE /D
UNICODE /Gm- /EHsc /RTC1 /MDd /GS /fp:precise /Zc:wchar_t /Zc:forScope /Zc:inline /GR /std:c++17 /Fo"test_camera_plugin.dir\Debug\\" /Fd"test_camera_plugin.dir\Debug\vc142.pdb" /Gd /TP /wd4100 /errorReport:queue
E:\projects_flutter\test_camera\example\windows\flutter\ephemeral\.plugin_symlinks\test_camera\windows\test_camera_plugin.cpp
[ +302 ms]   test_camera_plugin.cpp
[+2173 ms] Link:
[        ]   E:\Software\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\bin\HostX64\x64\link.exe /ERRORREPORT:QUEUE
/OUT:"E:\projects_flutter\test_camera\example\build\windows\plugins\test_camera\Debug\test_camera_plugin.dll" /INCREMENTAL /NOLOGO
/LIBPATH:"D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\lib" /LIBPATH:"D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\lib\manual-link"
..\..\flutter\Debug\flutter_wrapper_plugin.lib E:\projects_flutter\test_camera\example\windows\flutter\ephemeral\flutter_windows.dll.lib kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib
oleaut32.lib uuid.lib comdlg32.lib advapi32.lib "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\lib\*.lib" /MANIFEST /MANIFESTUAC:"level='asInvoker' uiAccess='false'"
/manifest:embed /DEBUG /PDB:"E:/projects_flutter/test_camera/example/build/windows/plugins/test_camera/Debug/test_camera_plugin.pdb" /SUBSYSTEM:CONSOLE /TLBID:1 /DYNAMICBASE /NXCOMPAT
/IMPLIB:"E:/projects_flutter/test_camera/example/build/windows/plugins/test_camera/Debug/test_camera_plugin.lib" /MACHINE:X64  /machine:x64 /DLL test_camera_plugin.dir\Debug\test_camera_plugin.obj
[ +406 ms]     正在创建库 E:/projects_flutter/test_camera/example/build/windows/plugins/test_camera/Debug/test_camera_plugin.lib 和对象
E:/projects_flutter/test_camera/example/build/windows/plugins/test_camera/Debug/test_camera_plugin.exp
[ +553 ms]   test_camera_plugin.vcxproj -> E:\projects_flutter\test_camera\example\build\windows\plugins\test_camera\Debug\test_camera_plugin.dll
[   +6 ms] AppLocalFromInstalled:
[        ]   pwsh.exe -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\plugins\test_camera\Debug\test_camera_plugin.dll" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"test_camera_plugin.dir\Debug\test_cam.21000FB7.tlog\test_camera_plugin.write.1u.tlog" "test_camera_plugin.dir\Debug\vcpkg.applocal.log"
[ +173 ms]   'pwsh.exe' is not recognized as an internal or external command,
[   +1 ms]   operable program or batch file.
[   +3 ms]   命令“pwsh.exe -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\plugins\test_camera\Debug\test_camera_plugin.dll" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"test_camera_plugin.dir\Debug\test_cam.21000FB7.tlog\test_camera_plugin.write.1u.tlog" "test_camera_plugin.dir\Debug\vcpkg.applocal.log"”已退出，代码为 9009。
[   +6 ms]   "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\plugins\test_camera\Debug\test_camera_plugin.dll" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"test_camera_plugin.dir\Debug\test_cam.21000FB7.tlog\test_camera_plugin.write.1u.tlog" "test_camera_plugin.dir\Debug\vcpkg.applocal.log"
[+1770 ms]   锘縈ethod invocation failed because [System.Threading.Mutex] doesn't contain a met
[   +1 ms]   hod named 'Dispose'.
[        ]   At D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1:59 char:25
[   +1 ms]   +             $mtx.Dispose <<<< () | Out-Null
[        ]       + CategoryInfo          : InvalidOperation: (Dispose:String) [], RuntimeEx
[        ]      ception
[        ]       + FullyQualifiedErrorId : MethodNotFound
[ +346 ms]   E:\projects_flutter\test_camera\example\build\windows\plugins\test_camera\Debug\fmtd.dll
[   +9 ms] _CopyFilesMarkedCopyLocal:
[        ]   正在创建“E:\projects_flutter\test_camera\example\build\windows\plugins\test_camera\test_camera_plugin.dir\Debug\test_camera_plugin.vcxproj.CopyComplete”，因为已指定“AlwaysCreate”。
[   +3 ms] FinalizeBuildStatus:
[        ]   正在删除文件“test_camera_plugin.dir\Debug\test_cam.21000FB7.tlog\unsuccessfulbuild”。
[   +2 ms]   正在对“test_camera_plugin.dir\Debug\test_cam.21000FB7.tlog\test_camera_plugin.lastbuildstate”执行 Touch 任务。
[        ] 已完成生成项目“E:\projects_flutter\test_camera\example\build\windows\plugins\test_camera\test_camera_plugin.vcxproj”(默认目标)的操作。
[  +11 ms] PrepareForBuild:
[        ]   正在创建目录“test_camera_example.dir\Debug\”。
[   +2 ms]   正在创建目录“E:\projects_flutter\test_camera\example\build\windows\runner\Debug\”。
[        ]   正在创建目录“test_camera_example.dir\Debug\test_cam.AD72D77D.tlog\”。
[   +3 ms] InitializeBuildStatus:
[        ]   正在创建“test_camera_example.dir\Debug\test_cam.AD72D77D.tlog\unsuccessfulbuild”，因为已指定“AlwaysCreate”。
[ +171 ms] CustomBuild:
[        ]   Building Custom Rule E:/projects_flutter/test_camera/example/windows/runner/CMakeLists.txt
[ +128 ms] VcpkgTripletSelection:
[        ]   Using triplet "x64-windows" from "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\"
[   +7 ms] ClCompile:
[   +1 ms]   E:\Software\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\bin\HostX64\x64\CL.exe /c /IE:\projects_flutter\test_camera\example\windows
/IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral /IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\include
/IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral\.plugin_symlinks\test_camera\windows\include /I"D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\include" /Zi /nologo
/W4 /WX /diagnostics:column /Od /Ob0 /D WIN32 /D _WINDOWS /D _HAS_EXCEPTIONS=0 /D _DEBUG /D NOMINMAX /D UNICODE /D _UNICODE /D "CMAKE_INTDIR=\"Debug\"" /D _UNICODE /D UNICODE /Gm- /EHsc /RTC1 /MDd /GS /fp:precise
/Zc:wchar_t /Zc:forScope /Zc:inline /GR /std:c++17 /Fo"test_camera_example.dir\Debug\\" /Fd"test_camera_example.dir\Debug\vc142.pdb" /Gd /TP /wd4100 /errorReport:queue
E:\projects_flutter\test_camera\example\windows\runner\flutter_window.cpp E:\projects_flutter\test_camera\example\windows\runner\main.cpp E:\projects_flutter\test_camera\example\windows\runner\run_loop.cpp
E:\projects_flutter\test_camera\example\windows\runner\utils.cpp E:\projects_flutter\test_camera\example\windows\runner\win32_window.cpp
E:\projects_flutter\test_camera\example\windows\flutter\generated_plugin_registrant.cc
[ +465 ms]   flutter_window.cpp
[+1201 ms]   main.cpp
[+1151 ms]   run_loop.cpp
[+1183 ms]   utils.cpp
[+1201 ms]   win32_window.cpp
[ +982 ms]   generated_plugin_registrant.cc
[ +355 ms]   正在生成代码...
[ +417 ms] ResourceCompile:
[   +1 ms]   D:\Windows Kits\10\bin\10.0.18362.0\x64\rc.exe /D WIN32 /D _DEBUG /D _WINDOWS /D _HAS_EXCEPTIONS=0 /D NOMINMAX /D UNICODE /D _UNICODE /D "CMAKE_INTDIR=\\\"Debug\\\"" /D _UNICODE /D UNICODE /l"0x0409"
/IE:\projects_flutter\test_camera\example\windows /IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral /IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral\cpp_client_wrapper\include
/IE:\projects_flutter\test_camera\example\windows\flutter\ephemeral\.plugin_symlinks\test_camera\windows\include /I"D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\include" /nologo
/fo"test_camera_example.dir\Debug\Runner.res" E:\projects_flutter\test_camera\example\windows\runner\Runner.rc
[ +284 ms] Link:
[        ]   E:\Software\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\bin\HostX64\x64\link.exe /ERRORREPORT:QUEUE
/OUT:"E:\projects_flutter\test_camera\example\build\windows\runner\Debug\test_camera_example.exe" /INCREMENTAL /NOLOGO
/LIBPATH:"D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\lib" /LIBPATH:"D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\lib\manual-link"
..\flutter\Debug\flutter_wrapper_app.lib ..\plugins\test_camera\Debug\test_camera_plugin.lib E:\projects_flutter\test_camera\example\windows\flutter\ephemeral\flutter_windows.dll.lib kernel32.lib user32.lib
gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\lib\*.lib" /MANIFEST
/MANIFESTUAC:"level='asInvoker' uiAccess='false'" /manifest:embed /manifestinput:E:\projects_flutter\test_camera\example\windows\runner\runner.exe.manifest /DEBUG
/PDB:"E:/projects_flutter/test_camera/example/build/windows/runner/Debug/test_camera_example.pdb" /SUBSYSTEM:WINDOWS /TLBID:1 /DYNAMICBASE /NXCOMPAT
/IMPLIB:"E:/projects_flutter/test_camera/example/build/windows/runner/Debug/test_camera_example.lib" /MACHINE:X64  /machine:x64 test_camera_example.dir\Debug\Runner.res
[   +1 ms]   test_camera_example.dir\Debug\flutter_window.obj
[        ]   test_camera_example.dir\Debug\main.obj
[        ]   test_camera_example.dir\Debug\run_loop.obj
[        ]   test_camera_example.dir\Debug\utils.obj
[        ]   test_camera_example.dir\Debug\win32_window.obj
[        ]   test_camera_example.dir\Debug\generated_plugin_registrant.obj
[ +656 ms]   test_camera_example.vcxproj -> E:\projects_flutter\test_camera\example\build\windows\runner\Debug\test_camera_example.exe
[   +5 ms] AppLocalFromInstalled:
[        ]   pwsh.exe -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\runner\Debug\test_camera_example.exe" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"test_camera_example.dir\Debug\test_cam.AD72D77D.tlog\test_camera_example.write.1u.tlog" "test_camera_example.dir\Debug\vcpkg.applocal.log"
[ +170 ms]   'pwsh.exe' is not recognized as an internal or external command,
[   +1 ms]   operable program or batch file.
[   +3 ms]   命令“pwsh.exe -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\runner\Debug\test_camera_example.exe" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"test_camera_example.dir\Debug\test_cam.AD72D77D.tlog\test_camera_example.write.1u.tlog" "test_camera_example.dir\Debug\vcpkg.applocal.log"”已退出，代码为 9009。
[   +5 ms]   "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -noprofile -File "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\applocal.ps1"
"E:\projects_flutter\test_camera\example\build\windows\runner\Debug\test_camera_example.exe" "D:\GitHub\vcpkg\scripts\buildsystems\msbuild\..\..\..\installed\x64-windows\debug\bin"
"test_camera_example.dir\Debug\test_cam.AD72D77D.tlog\test_camera_example.write.1u.tlog" "test_camera_example.dir\Debug\vcpkg.applocal.log"
[+1719 ms] FinalizeBuildStatus:
[        ]   正在删除文件“test_camera_example.dir\Debug\test_cam.AD72D77D.tlog\unsuccessfulbuild”。
[        ]   正在对“test_camera_example.dir\Debug\test_cam.AD72D77D.tlog\test_camera_example.lastbuildstate”执行 Touch 任务。
[   +1 ms] 已完成生成项目“E:\projects_flutter\test_camera\example\build\windows\runner\test_camera_example.vcxproj”(默认目标)的操作。
[   +5 ms] PrepareForBuild:
[        ]   正在创建目录“x64\Debug\ALL_BUILD\”。
[   +2 ms]   正在创建目录“x64\Debug\ALL_BUILD\ALL_BUILD.tlog\”。
[   +2 ms] InitializeBuildStatus:
[        ]   正在创建“x64\Debug\ALL_BUILD\ALL_BUILD.tlog\unsuccessfulbuild”，因为已指定“AlwaysCreate”。
[ +165 ms] CustomBuild:
[        ]   Building Custom Rule E:/projects_flutter/test_camera/example/windows/CMakeLists.txt
[ +141 ms] FinalizeBuildStatus:
[        ]   正在删除文件“x64\Debug\ALL_BUILD\ALL_BUILD.tlog\unsuccessfulbuild”。
[   +1 ms]   正在对“x64\Debug\ALL_BUILD\ALL_BUILD.tlog\ALL_BUILD.lastbuildstate”执行 Touch 任务。
[        ] 已完成生成项目“E:\projects_flutter\test_camera\example\build\windows\ALL_BUILD.vcxproj”(默认目标)的操作。
[   +4 ms] PrepareForBuild:
[   +1 ms]   正在创建目录“x64\Debug\INSTALL\”。
[   +2 ms]   正在创建目录“x64\Debug\INSTALL\INSTALL.tlog\”。
[   +2 ms] InitializeBuildStatus:
[   +1 ms]   正在创建“x64\Debug\INSTALL\INSTALL.tlog\unsuccessfulbuild”，因为已指定“AlwaysCreate”。
[ +179 ms] PostBuildEvent:
[        ]   setlocal
[        ]   "E:\Software\Microsoft Visual Studio\2019\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe" -DBUILD_TYPE=Debug -P cmake_install.cmake
[        ]   if %errorlevel% neq 0 goto :cmEnd
[        ]   :cmEnd
[        ]   endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
[        ]   :cmErrorLevel
[        ]   exit /b %1
[        ]   :cmDone
[        ]   if %errorlevel% neq 0 goto :VCEnd
[        ]   :VCEnd
[ +263 ms]   -- Install configuration: "Debug"
[   +5 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/icudtl.dat
[   +6 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/flutter_windows.dll
[  +78 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/test_camera_plugin.dll
[   +7 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets
[   +6 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets/AssetManifest.json
[   +3 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets/FontManifest.json
[   +3 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets/fonts
[   +3 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets/fonts/MaterialIcons-Regular.otf
[   +7 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets/kernel_blob.bin
[  +84 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets/NOTICES
[   +5 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets/packages
[   +4 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets/packages/cupertino_icons
[   +4 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets/packages/cupertino_icons/assets
[   +4 ms]   -- Installing: E:/projects_flutter/test_camera/example/build/windows/runner/Debug/data/flutter_assets/packages/cupertino_icons/assets/CupertinoIcons.ttf
[  +20 ms] FinalizeBuildStatus:
[   +3 ms]   正在删除文件“x64\Debug\INSTALL\INSTALL.tlog\unsuccessfulbuild”。
[        ]   正在对“x64\Debug\INSTALL\INSTALL.tlog\INSTALL.lastbuildstate”执行 Touch 任务。
[        ] 已完成生成项目“E:\projects_flutter\test_camera\example\build\windows\INSTALL.vcxproj”(默认目标)的操作。
[        ] 已成功生成。
[        ]     0 个警告
[   +1 ms]     0 个错误
[        ] 已用时间 00:00:45.96
[  +37 ms] Building Windows application... (completed in 47.2s)
[ +496 ms] Error waiting for a debug connection: The log reader stopped unexpectedly.
[   +3 ms] Error launching application on Windows.
[   +3 ms] "flutter run" took 48,635ms.
[   +5 ms]
           #0      throwToolExit (package:flutter_tools/src/base/common.dart:10:3)
           #1      RunCommand.runCommand (package:flutter_tools/src/commands/run.dart:625:7)
           <asynchronous suspension>
           #2      FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:1157:12)
           <asynchronous suspension>
           #3      FlutterCommand.run.<anonymous closure> (package:flutter_tools/src/runner/flutter_command.dart:1009:27)
           <asynchronous suspension>
           #4      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
           <asynchronous suspension>
           #5      AppContext.run (package:flutter_tools/src/base/context.dart:149:12)
           <asynchronous suspension>
           #6      CommandRunner.runCommand (package:args/command_runner.dart:197:13)
           <asynchronous suspension>
           #7      FlutterCommandRunner.runCommand.<anonymous closure> (package:flutter_tools/src/runner/flutter_command_runner.dart:278:9)
           <asynchronous suspension>
           #8      AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
           <asynchronous suspension>
           #9      AppContext.run (package:flutter_tools/src/base/context.dart:149:12)
           <asynchronous suspension>
           #10     FlutterCommandRunner.runCommand (package:flutter_tools/src/runner/flutter_command_runner.dart:234:5)
           <asynchronous suspension>
           #11     run.<anonymous closure>.<anonymous closure> (package:flutter_tools/runner.dart:64:9)
           <asynchronous suspension>
           #12     run.<anonymous closure> (package:flutter_tools/runner.dart:62:12)
           <asynchronous suspension>
           #13     AppContext.run.<anonymous closure> (package:flutter_tools/src/base/context.dart:150:19)
           <asynchronous suspension>
           #14     AppContext.run (package:flutter_tools/src/base/context.dart:149:12)
           <asynchronous suspension>
           #15     runInContext (package:flutter_tools/src/context_runner.dart:73:10)
           <asynchronous suspension>
           #16     main (package:flutter_tools/executable.dart:90:3)
           <asynchronous suspension>


[ +255 ms] ensureAnalyticsSent: 252ms
[   +1 ms] Running shutdown hooks
[        ] Shutdown hook priority 4
[   +9 ms] Shutdown hooks complete
[   +1 ms] exiting with code 1
PS E:\projects_flutter\test_camera\example> flutter run -d windows
Launching lib\main.dart on Windows in debug mode...
Building Windows application...

══╡ EXCEPTION CAUGHT BY SERVICES LIBRARY ╞══════════════════════════════════════════════════════════
The following PlatformException was thrown while activating platform stream on channel
image_callback:
PlatformException(0, null, null, null)

When the exception was thrown, this was the stack:
#0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:581:7)
#1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:158:18)
<asynchronous suspension>
#2      EventChannel.receiveBroadcastStream.<anonymous closure> (package:flutter/src/services/platform_channel.dart:545:9)
<asynchronous suspension>
════════════════════════════════════════════════════════════════════════════════════════════════════
Syncing files to device Windows...                                 181ms

Flutter run key commands.
r Hot reload.
R Hot restart.
h Repeat this help message.
d Detach (terminate "flutter run" but leave application running).
c Clear the screen
q Quit (terminate the application on the device).
An Observatory debugger and profiler on Windows is available at: http://127.0.0.1:13336/UFIiwmOY6I4=/

Flutter DevTools, a Flutter debugger and profiler, on Windows is available at: http://127.0.0.1:9101?uri=http%3A%2F%2F127.0.0.1%3A13336%2FUFIiwmOY6I4%3D%2F

Running with unsound null safety
For more information see https://dart.dev/null-safety/unsound-null-safety
Application finished.
终止批处理操作吗(Y/N)? y
PS E:\projects_flutter\test_camera\example>

PS E:\projects_flutter\test_camera\example> flutter analyze
Analyzing example...

   info - Unused import: 'dart:developer' - lib\main.dart:1:8 - unused_import
   info - Unused import: 'dart:typed_data' - lib\main.dart:2:8 - unused_import
   info - Unused import: 'package:flutter/services.dart' - lib\main.dart:7:8 - unused_import

3 issues found. (ran in 4.6s)
PS E:\projects_flutter\test_camera\example>

PS E:\projects_flutter\test_camera\example> flutter analyze
Analyzing example...

   info - Unused import: 'dart:developer' - lib\main.dart:1:8 - unused_import
   info - Unused import: 'dart:typed_data' - lib\main.dart:2:8 - unused_import
   info - Unused import: 'package:flutter/services.dart' - lib\main.dart:7:8 - unused_import

3 issues found. (ran in 4.6s)
PS E:\projects_flutter\test_camera\example> flutter doctor -v
[√] Flutter (Channel dev, 1.26.0-17.2.pre, on Microsoft Windows [Version 6.1.7601], locale zh-CN)
    • Flutter version 1.26.0-17.2.pre at E:\GitHub\Flutter
    • Framework revision 79b49b9e10 (2 weeks ago), 2021-02-03 15:33:39 -0800
    • Engine revision 2c527d6c7e
    • Dart version 2.12.0 (build 2.12.0-259.8.beta)
    • Pub download mirror https://pub.flutter-io.cn
    • Flutter download mirror https://storage.flutter-io.cn

[X] Android toolchain - develop for Android devices
    X Unable to locate Android SDK.
      Install Android Studio from: https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK components.
      (or visit https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions).
      If the Android SDK has been installed to a custom location, please use
      `flutter config --android-sdk` to update to that location.


[√] Chrome - develop for the web
    • Chrome at C:\Users\Administrator\AppData\Local\Google\Chrome\Application\chrome.exe

[√] Visual Studio - develop for Windows (Visual Studio Community 2019 16.8.4)
    • Visual Studio at E:\Software\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.8.30907.101
    • Windows 10 SDK version 10.0.18362.0

[!] Android Studio (not installed)
    • Android Studio not found; download from https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions).

[√] IntelliJ IDEA Community Edition (version 2019.2)
    • IntelliJ at E:\Software\JetBrains\IntelliJ IDEA Community Edition 2019.2.1
    • 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

[√] Connected device (2 available)
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [Version 6.1.7601]
    • Chrome (web)      • chrome  • web-javascript • Google Chrome 87.0.4280.88

! Doctor found issues in 2 categories.
PS E:\projects_flutter\test_camera\example>

[stuartmorgan-g]

Please provide sample code in an easily accessible format (GitHub project, pastebin, etc.) rather than a format that requires downloading and unarchiving with extra software.

It's also not clear from the description why you believe your issues are with Flutter itself, rather than your code. Please describe the Flutter APIs that you believe are crashing or leaking.

[fawdlstty]

I'm not sure if the problem was with the flutter itself, but the flutter itself probably had an exception, because I couldn't start the program with the flutter run -d windows --verbose command. I could only start the program with the flutter run -d windows command, which is documented in the above log

[fawdlstty]

Another problem is when memory leak state, CPU usage is up to 50% (my computer is 4 core thread). so even in my case, Flutter itself or desktop embedded probably still has one or two threads that are always idling

[stuartmorgan-g]

Memory leaks, crashes, and excessive CPU usage are all things that could be caused by the platform code of your plugin. Please provide specific details about the Flutter APIs that you believe to have issues, and why.

A number of Windows plugins exist that do not crash, leak memory, or max multiple cores; clear details on what debugging you have done to isolate the problem to Flutter, rather than your code, are going to be necessary to move forward here.

[fawdlstty]

Please provide sample code in an easily accessible format (GitHub project, pastebin, etc.)

https://gitea.com/fawdlstty/test_camera

Please provide specific details about the Flutter APIs that you believe to have issues, and why.

I don't know the exact reason yet, but let me make sure now

[stuartmorgan-g]

You appear to be passing an flutter::EventSink across threads; except where specifically noted, the API surface is not thread-safe, and callbacks must be made on the same thread you received the object on.

(/cc @cbracken It might be worth calling out somewhere in docs/headers that objects should not be used from other threads except where noted.)

[fawdlstty]

I found that the fast memory leaks and crashes were caused by my code. After the fixes, there are still slow memory leaks, most likely caused by the plug-in code. Let me trace the cause now

[nt4f04uNd]

@stuartmorgan

except where specifically noted, the API surface is not thread-safe

does that apply to all engines?

[fawdlstty]

in https://gitea.com/fawdlstty/test_camera/src/branch/master/windows/test_camera_plugin.cpp#L63:

This line of code causes persistent memory to increase, if change it to m_sink.get ()->Success ();, will still increase memory, if commented out, then will not increase memory.

Code eventually entered the https://github.com/flutter/engine, but I don't know how to debug the program, how should I can do a breakpoint debugging in this project?

[fawdlstty]

callbacks must be made on the same thread you received the object on

I should not return the OnListenInternal method and loop to process data?