hread 41 Crashed:
0 libobjc.A.dylib 0x7ff802539d8b objc_msgSend + 11
1 monotouchtest 0x1026788c5 xamarin_gc_toggleref_callback + 53 (runtime.m:747)
2 monotouchtest 0x10268216e xamarin_coreclr_reference_tracking_is_referenced_callback + 30 (coreclr-bridge.m:306)
3 monotouchtest 0x102852504 ObjCMarshalNative::IsTrackedReference(Object*, bool*) + 100 (interoplibinterface_objc.cpp:141)
4 monotouchtest 0x102808bc7 GCToEEInterface::RefCountedHandleCallbacks(Object*) + 39 (gcenv.ee.cpp:177)
5 monotouchtest 0x10284a7df PromoteRefCounted(Object**, unsigned long*, unsigned long, unsigned long) + 79 (objecthandle.cpp:98)
6 monotouchtest 0x1028490ae ScanConsecutiveHandlesWithoutUserData(Object**, Object**, ScanCallbackInfo*, unsigned long*) + 63 (handletablescan.cpp:442) [inlined]
7 monotouchtest 0x1028490ae BlockScanBlocksWithoutUserData(TableSegment*, unsigned int, unsigned int, ScanCallbackInfo*) + 126 (handletablescan.cpp:554)
8 monotouchtest 0x10284a05c SegmentScanByTypeChain(TableSegment*, unsigned int, void (*)(TableSegment*, unsigned int, unsigned int, ScanCallbackInfo*), ScanCallbackInfo*) + 56 (handletablescan.cpp:1632) [inlined]
9 monotouchtest 0x10284a05c TableScanHandles(HandleTable*, unsigned int const*, unsigned int, TableSegment* (*)(HandleTable*, TableSegment*, CrstHolderWithState*), void (*)(TableSegment*, unsigned int, unsigned int, ScanCallbackInfo*), ScanCallbackInfo*, CrstHolderWithState*) + 396 (handletablescan.cpp:1749)
10 monotouchtest 0x102845ef3 HndScanHandlesForGC(HandleTable*, void (*)(Object**, unsigned long*, unsigned long, unsigned long), unsigned long, unsigned long, unsigned int const*, unsigned int, unsigned int, unsigned int, unsigned int) + 371 (handletable.cpp:794)
11 monotouchtest 0x10284b84d Ref_TraceNormalRoots(unsigned int, unsigned int, ScanContext*, void (*)(Object**, ScanContext*, unsigned int)) + 1405 (objecthandle.cpp:1171)
12 monotouchtest 0x1028236cb WKS::gc_heap::mark_phase(int) + 1659 (gc.cpp:30142)
13 monotouchtest 0x1028203a4 WKS::gc_heap::gc1() + 804 (gc.cpp:22587)
14 monotouchtest 0x10282b1ff WKS::gc_heap::garbage_collect(int) + 1839
15 monotouchtest 0x10281c126 WKS::GCHeap::GarbageCollectGeneration(unsigned int, gc_reason) + 998 (gc.cpp:51582)
16 monotouchtest 0x1028427f6 WKS::GCHeap::GarbageCollectTry(int, int, int) + 13 (gc.cpp:50773) [inlined]
17 monotouchtest 0x1028427f6 WKS::GCHeap::GarbageCollect(int, bool, int) + 422 (gc.cpp:50703)
18 monotouchtest 0x102806b60 RhCollect + 80 (GCHelpers.cpp:124)
19 monotouchtest 0x10352e7cb monotouchtest_MonoTouchFixtures_CoreAnimation_LayerTest___c__DisplayClass9_0___TestBug26532_b__0 + 171 (LayerTest.cs:122)
20 monotouchtest 0x102c16d41 S_P_CoreLib_System_Threading_Thread_StartHelper__Callback + 161 (Thread.cs:45)
21 monotouchtest 0x102b9f0a9 S_P_CoreLib_System_Threading_ExecutionContext__RunInternal + 137 (ExecutionContext.cs:194)
22 monotouchtest 0x102b9c7cf S_P_CoreLib_System_Threading_Thread__StartThread + 335 (Thread.NativeAot.cs:440)
23 monotouchtest 0x102b9cac9 <deduplicated_symbol> + 25
24 libsystem_pthread.dylib 0x108b6a857 thread_start + 15
Thread 0:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x108fa06f6 __psynch_cvwait + 10
1 libsystem_pthread.dylib 0x108b6f335 _pthread_cond_wait + 1039
2 monotouchtest 0x102c1c61c S_P_CoreLib_System_Threading_WaitSubsystem_ThreadWaitInfo__Wait + 412 (WaitSubsystem.ThreadWaitInfo.Unix.cs:332)
3 monotouchtest 0x102ba8bcc S_P_CoreLib_System_Threading_WaitSubsystem__Wait + 124 (WaitSubsystem.HandleManager.Unix.cs:35)
4 monotouchtest 0x102b9d2b1 S_P_CoreLib_System_Threading_Thread__JoinInternal + 145 (Thread.Unix.cs:68)
5 monotouchtest 0x10352dfec monotouchtest_MonoTouchFixtures_CoreAnimation_LayerTest__TestBug26532 + 140 (LayerTest.cs:136)
6 monotouchtest 0x103831c33 Internal_CompilerGenerated__Module___<DynamicInvoke>None<S_P_CoreLib_System_Void> + 35
7 monotouchtest 0x102bdba43 S_P_CoreLib_System_Reflection_DynamicInvokeInfo__Invoke + 243 (DynamicInvokeInfo.cs:230)
8 monotouchtest 0x102c3232f S_P_Reflection_Execution_Internal_Reflection_Execution_MethodInvokers_InstanceMethodInvoker__Invoke + 79 (InstanceMethodInvoker.cs:58)
9 monotouchtest 0x102c03958 S_P_CoreLib_Internal_Reflection_Core_Execution_MethodBaseInvoker__Invoke + 72 (MethodBaseInvoker.cs:30)
10 monotouchtest 0x102be3410 S_P_CoreLib_System_Reflection_Runtime_MethodInfos_RuntimeMethodInfo__Invoke + 112 (RuntimeMethodInfo.cs:166)
11 monotouchtest 0x10358e8a8 nunit_framework_NUnit_Framework_Internal_Reflect__InvokeMethod_0 + 40
12 monotouchtest 0x1035a12ce nunit_framework_NUnit_Framework_Internal_Commands_TestMethodCommand__Execute + 30
13 monotouchtest 0x10359cea2 nunit_framework_NUnit_Framework_Internal_Execution_SimpleWorkItem__PerformWork + 34
14 monotouchtest 0x10359e929 nunit_framework_NUnit_Framework_Internal_Execution_WorkItem__RunOnCurrentThread + 297
15 monotouchtest 0x10359a389 nunit_framework_NUnit_Framework_Internal_Execution_CompositeWorkItem__RunChildren + 521
16 monotouchtest 0x10359e91f nunit_framework_NUnit_Framework_Internal_Execution_WorkItem__RunOnCurrentThread + 287
17 monotouchtest 0x10359a389 nunit_framework_NUnit_Framework_Internal_Execution_CompositeWorkItem__RunChildren + 521
18 monotouchtest 0x10359e91f nunit_framework_NUnit_Framework_Internal_Execution_WorkItem__RunOnCurrentThread + 287
19 monotouchtest 0x10359a389 nunit_framework_NUnit_Framework_Internal_Execution_CompositeWorkItem__RunChildren + 521
20 monotouchtest 0x10359e91f nunit_framework_NUnit_Framework_Internal_Execution_WorkItem__RunOnCurrentThread + 287
21 monotouchtest 0x10359a389 nunit_framework_NUnit_Framework_Internal_Execution_CompositeWorkItem__RunChildren + 521
22 monotouchtest 0x10359e91f nunit_framework_NUnit_Framework_Internal_Execution_WorkItem__RunOnCurrentThread + 287
23 monotouchtest 0x102d37b07 Touch_Client_MonoTouch_NUnit_UI_BaseTouchRunner__Run_0 + 487 (TouchRunner.cs:640)
24 monotouchtest 0x102d364f5 Touch_Client_MonoTouch_NUnit_UI_BaseTouchRunner__Run + 53 (TouchRunner.cs:268)
25 monotouchtest 0x102d37e4f Touch_Client_MonoTouch_NUnit_UI_BaseTouchRunner___AutoRun_b__49_0 + 47 (TouchRunner.cs:228)
26 monotouchtest 0x102987ac4 Microsoft_iOS_Foundation_NSAsyncActionDispatcher__Apply + 36 (NSAction.cs:138)
27 monotouchtest 0x102987b9f <deduplicated_symbol> + 95
28 monotouchtest 0x1027ed23c -[__MonoMac_NSAsyncActionDispatcher xamarinApplySelector] + 76 (registrar.mm:138285)
[...]
Crashing thread:
main thread is running the test:
Full crash report: https://gist.github.com/rolfbjarne/fb33c956faf068149c9c705dd4957792
Currently I've only seen this test variation crash like this: