"ConvertResourcesCases" 任务意外失败。 Xamarin Android 构建
The "ConvertResourcesCases" task failed unexpectedly. Xamarin Android build
当我使用 Visual Studio 2017 为 Mac（7.7.4 build 1）构建 Xamarin Android 应用程序时，Mono JIT 编译器版本 5.18.0.248 (2018-08/a4956c837e1 2019 年 1 月 25 日星期五 16:13:12 EST）我遇到以下异常：
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: The "ConvertResourcesCases" task failed unexpectedly.
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: System.IO.IOException: Could not create file "/Users/username/Companymobil/src/Company.Recipes.Droid/obj/Debug/lp/35/jl/res/values-ca/values-ca.xml" or "/var/folders/b5/821mhz8n0px17rnxglrjq5mc0000gp/T/tmp565e9644.tmp". File already exists.
/var/folders/b5/821mhz8n0px17rnxglrjq5mc0000gp/T/
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at System.IO.File.Copy (System.String sourceFileName, System.String destFileName, System.Boolean overwrite) [0x00193] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/mono-x64/mcs/class/corlib/System.IO/File.cs:111
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.FixupResources (Microsoft.Build.Framework.ITaskItem item, System.Collections.Generic.Dictionary`2[TKey,TValue] acwMap) [0x00204] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.FixupResources (System.Collections.Generic.Dictionary`2[TKey,TValue] acwMap) [0x0000f] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.Execute () [0x000a7] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute () [0x00023] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/msbuild-15/src/Build/BackEnd/TaskExecutionHost/TaskExecutionHost.cs:573
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask (Microsoft.Build.BackEnd.ITaskExecutionHost taskExecutionHost, Microsoft.Build.BackEnd.Logging.TaskLoggingContext taskLoggingContext, Microsoft.Build.BackEnd.TaskHost taskHost, Microsoft.Build.BackEnd.ItemBucket bucket, Microsoft.Build.BackEnd.TaskExecutionMode howToExecuteTask) [0x001f6] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/msbuild-15/src/Build/BackEnd/Components/RequestBuilder/TaskBuilder.cs:784
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: The "ConvertResourcesCases" task failed unexpectedly.
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: System.IO.IOException: Could not create file "/Users/username/Companymobil/src/Company.ServerAnnouncement.Droid/obj/Debug/lp/15/jl/res/layout/notification_template_icon_group.xml" or "/var/folders/b5/821mhz8n0px17rnxglrjq5mc0000gp/T/tmp4d4475a7.tmp". File already exists.
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at System.IO.File.Copy (System.String sourceFileName, System.String destFileName, System.Boolean overwrite) [0x00193] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/mono-x64/mcs/class/corlib/System.IO/File.cs:111
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.FixupResources (Microsoft.Build.Framework.ITaskItem item, System.Collections.Generic.Dictionary`2[TKey,TValue] acwMap) [0x00204] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.FixupResources (System.Collections.Generic.Dictionary`2[TKey,TValue] acwMap) [0x0000f] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.Execute () [0x000a7] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute () [0x00023] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/msbuild-15/src/Build/BackEnd/TaskExecutionHost/TaskExecutionHost.cs:573
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask (Microsoft.Build.BackEnd.ITaskExecutionHost taskExecutionHost, Microsoft.Build.BackEnd.Logging.TaskLoggingContext taskLoggingContext, Microsoft.Build.BackEnd.TaskHost taskHost, Microsoft.Build.BackEnd.ItemBucket bucket, Microsoft.Build.BackEnd.TaskExecutionMode howToExecuteTask) [0x001f6] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/msbuild-15/src/Build/BackEnd/Components/RequestBuilder/TaskBuilder.cs:784
如果我点击构建（不重建），每次构建时这些异常都会减少，直到最终构建成功。
如果我使用 jetbrains Rider，每次构建都会成功。
我对异常中提到的目录的每个人都授予了完全权限 (r/w)，但我仍然收到错误。我使用 APFS 不区分大小写。
如果有任何解决此问题的指示，我将不胜感激。
非常感谢微软的 Leon Lu 为我指明了正确的方向。该错误源于并行构建 xamarin android 中的一个条件。当禁用并行构建时，每次的结果都是相同的。可以在 Visual Studio 2017 的首选项中为 Mac 禁用并行构建（见附图）。
该问题似乎已解决（请参阅 Leon Lu 评论中的 GitHub link）并将在未来的更新中推出。
当我使用 Visual Studio 2017 为 Mac（7.7.4 build 1）构建 Xamarin Android 应用程序时，Mono JIT 编译器版本 5.18.0.248 (2018-08/a4956c837e1 2019 年 1 月 25 日星期五 16:13:12 EST）我遇到以下异常：
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: The "ConvertResourcesCases" task failed unexpectedly.
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: System.IO.IOException: Could not create file "/Users/username/Companymobil/src/Company.Recipes.Droid/obj/Debug/lp/35/jl/res/values-ca/values-ca.xml" or "/var/folders/b5/821mhz8n0px17rnxglrjq5mc0000gp/T/tmp565e9644.tmp". File already exists.
/var/folders/b5/821mhz8n0px17rnxglrjq5mc0000gp/T/
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at System.IO.File.Copy (System.String sourceFileName, System.String destFileName, System.Boolean overwrite) [0x00193] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/mono-x64/mcs/class/corlib/System.IO/File.cs:111
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.FixupResources (Microsoft.Build.Framework.ITaskItem item, System.Collections.Generic.Dictionary`2[TKey,TValue] acwMap) [0x00204] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.FixupResources (System.Collections.Generic.Dictionary`2[TKey,TValue] acwMap) [0x0000f] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.Execute () [0x000a7] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute () [0x00023] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/msbuild-15/src/Build/BackEnd/TaskExecutionHost/TaskExecutionHost.cs:573
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask (Microsoft.Build.BackEnd.ITaskExecutionHost taskExecutionHost, Microsoft.Build.BackEnd.Logging.TaskLoggingContext taskLoggingContext, Microsoft.Build.BackEnd.TaskHost taskHost, Microsoft.Build.BackEnd.ItemBucket bucket, Microsoft.Build.BackEnd.TaskExecutionMode howToExecuteTask) [0x001f6] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/msbuild-15/src/Build/BackEnd/Components/RequestBuilder/TaskBuilder.cs:784
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: The "ConvertResourcesCases" task failed unexpectedly.
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: System.IO.IOException: Could not create file "/Users/username/Companymobil/src/Company.ServerAnnouncement.Droid/obj/Debug/lp/15/jl/res/layout/notification_template_icon_group.xml" or "/var/folders/b5/821mhz8n0px17rnxglrjq5mc0000gp/T/tmp4d4475a7.tmp". File already exists.
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at System.IO.File.Copy (System.String sourceFileName, System.String destFileName, System.Boolean overwrite) [0x00193] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/mono-x64/mcs/class/corlib/System.IO/File.cs:111
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.FixupResources (Microsoft.Build.Framework.ITaskItem item, System.Collections.Generic.Dictionary`2[TKey,TValue] acwMap) [0x00204] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.FixupResources (System.Collections.Generic.Dictionary`2[TKey,TValue] acwMap) [0x0000f] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Xamarin.Android.Tasks.ConvertResourcesCases.Execute () [0x000a7] in <78f051a6e2064f849cc3ee585300af39>:0
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute () [0x00023] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/msbuild-15/src/Build/BackEnd/TaskExecutionHost/TaskExecutionHost.cs:573
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/Android/Xamarin.Android.Common.targets(1689,2): error MSB4018: at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask (Microsoft.Build.BackEnd.ITaskExecutionHost taskExecutionHost, Microsoft.Build.BackEnd.Logging.TaskLoggingContext taskLoggingContext, Microsoft.Build.BackEnd.TaskHost taskHost, Microsoft.Build.BackEnd.ItemBucket bucket, Microsoft.Build.BackEnd.TaskExecutionMode howToExecuteTask) [0x001f6] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/msbuild-15/src/Build/BackEnd/Components/RequestBuilder/TaskBuilder.cs:784
如果我点击构建（不重建），每次构建时这些异常都会减少，直到最终构建成功。
如果我使用 jetbrains Rider，每次构建都会成功。
我对异常中提到的目录的每个人都授予了完全权限 (r/w)，但我仍然收到错误。我使用 APFS 不区分大小写。
如果有任何解决此问题的指示，我将不胜感激。
非常感谢微软的 Leon Lu 为我指明了正确的方向。该错误源于并行构建 xamarin android 中的一个条件。当禁用并行构建时，每次的结果都是相同的。可以在 Visual Studio 2017 的首选项中为 Mac 禁用并行构建（见附图）。
该问题似乎已解决（请参阅 Leon Lu 评论中的 GitHub link）并将在未来的更新中推出。