c# - native Xamarin.Android 应用程序在 Release模式下不断崩溃

Question

我有一个几年前构建的 native Xamarin.Android 应用程序，从那时起我一直在维护它。最近，我尝试构建一个新版本，但应用程序不断崩溃。我过去使用相同的项目和编译设置发布了数十个版本。这是我在发布中获得的堆栈跟踪示例:

[mono-rt] [ERROR] FATAL UNHANDLED EXCEPTION: System.IO.FileNotFoundException: Could not load file or assembly 'System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' or one of its dependencies.
[mono-rt]   at System.Threading.Tasks.TaskFactory`1[TResult].FromAsyncCoreLogic (System.IAsyncResult iar, System.Func`2[T,TResult] endFunction, System.Action`1[T] endAction10-21 13:24:49.970 F/mono-rt (15785): File name: 'System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e'
[mono-rt]   at Java.Interop.JniEnvironmentInfo..ctor () [0x00006] in :0 
[mono-rt]   at Java.Interop.JniEnvironment+c.b__35_0 () [0x00000] in :0 
[mono-rt]   at System.Threading.ThreadLocal`1[T].GetValueSlow () [0x00031] in :0 
[mono-rt]   at System.Threading.ThreadLocal`1[T].get_Value () [0x0003e] in :0 
[mono-rt]   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in :0ds.CallStaticObjectMethod (Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args) [0x0002d] in :0 
[mono-rt]   at Java.Interop.JniPeerMembers+JniStaticMethods.InvokeObjectMethod (System.String encodedMember, Java.Interop.JniArgumentValue* parameters) [0x00018] in :0 
[mono-rt]   at Java.Interop.JniEnvironment+StaticMet10-21 13:24:49.970 F/mono-rt (15785):   at Android.OS.Looper.get_MainLooper () [0x0000a] in :0 
[mono-rt]   at Android.Runtime.AndroidEnvironment.GetDefaultSyncContext () [0x00000] in :0 
[mono-rt]   at System.AndroidPlatform.GetDefaultSyncContext () [0x00000] in :0 
[mono-rt]   at System.Threading.SynchronizationContext.GetThreadLocalContext () [0x00005] in :0 
[mono-rt]   at System.Threading.Tasks.SynchronizationContextAwaitTaskContinuation.Run (System.Threading.Tasks.Task ignored, System.Boolean canInlineContinuationTask) [0x00003] in :0 
[mono-rt]   at System.Threading.Tasks.Task.FinishStageThree () [0x0003c] in :0 
[mono-rt]   at System.Threading.Tasks.Task`1[TResult].TrySetResult (TResult result) [0x0004f] in :0 
[mono-rt]   at System.Threading.Tasks.TaskFactory`1+c__DisplayClass38_0`1[TResult,TArg1].b__0 (System.IAsyncResult iar) [0x00008] in :0 
[mono-rt]   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in 10-21 13:24:49.970 F/mono-rt (15785):   at (wrapper managed-to-native) System.Runtime.Remoting.Messaging.AsyncResult.Invoke(System.Runtime.Remoting.Messaging.AsyncResult)
[mono-rt]   at System.Runtime.Remoting.Messaging.AsyncResult.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00000] in :0 
[mono-rt]   at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in :0 

从堆栈跟踪中，我感觉链接器可能有问题，但我已经尝试了所有 3 个设置(不链接、仅链接 SDK 程序集、链接全部)。当在这里或那里更改一些代码时，我有时会得到略有不同的堆栈跟踪，但没有什么真正有用的。这是我正在使用的编译设置:

应用程序有时会成功启动，而不会在特殊情况下进行更改。它只会工作一次。

我错过了什么？

Answer 1

我很确定您在发布时有一些奇怪的行为。由于您在 android 上使用 mono，您可能会在某个地方调用一个等待函数，该函数返回 Task<T>你不能使用await，而是使用.GetAwaiter().Result。

https://github.com/xamarin/xamarin-android/issues/6409