[iOS/tvOS] `System.Runtime.Tests` crash with signal 4

[kotlarmilos]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1072357&view=logs&j=7f49df26-8126-5de3-bf2f-6ac6bde01830&t=c62b6a8c-bf71-5057-7f45-9c355fe0b802
Build error leg or test failing: System.Runtime.Tests

Error Message

Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": "Application 'net.dot.System.Runtime.Tests' terminated (with exit code '' and/or crashing signal '4).",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Logs:

[08:04:31] dbug: [08:04:22.9258080] 2025-06-14 05:04:23.009 System.Runtime.Tests[51169:174009368] 	[PASS] System.Tests.StringTests.NonRandomizedGetHashCode_EquivalentForStringAndSpan
[08:04:31] dbug: [08:04:22.9823520] 2025-06-14 05:04:23.065 System.Runtime.Tests[51169:174009368] 	[PASS] System.Tests.StringTests.NonRandomizedGetHashCode_EquivalentForStringAndSpan
[08:04:31] dbug: [08:04:23.0862410] 2025-06-14 05:04:23.168 System.Runtime.Tests[51169:174009368] 	[PASS] System.Tests.StringTests.NonRandomizedGetHashCode_EquivalentForStringAndSpan
[08:04:31] dbug: [08:04:23.1905250] 2025-06-14 05:04:23.274 System.Runtime.Tests[51169:174009368] 	[PASS] System.Tests.StringTests.NonRandomizedGetHashCode_EquivalentForStringAndSpan
[08:04:31] dbug: [08:04:23.2425390] Xamarin.Hosting: Process '51169' exited with exit code  or crashing signal 4.
[08:04:31] dbug: [08:04:23.2432150] Application 'net.dot.System.Runtime.Tests' terminated (with exit code '' and/or crashing signal '4).
[08:04:31] dbug: ==================== End of ApplicationLog ====================
[08:04:31] dbug: 
[08:04:31] dbug: ==================== SystemLog ====================
[08:04:31] dbug: Log file: /tmp/helix/working/A53F08DC/w/A54E08E9/uploads/device-DNCENGTVOS-006-20250614_080252.log

Changes in #116538 made the error visible on iOS/tvOS. The error code indicates an invalid CPU instruction.

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1072357
Error message validated: [Application 'net.dot.System.Runtime.Tests' terminated (with exit code '' and/or crashing signal '4).]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 6/19/2025 11:04:44 AM UTC

Report

Build	Definition	Test	Pull Request
1088919	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117441
1087849	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1087846	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1075546	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#116772
1081661	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117044
1082710	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117190
1079832	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#116310
1081111	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117059
1081919	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117115
1081903	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#116848
1081890	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#114531
1081365	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117103
1081805	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117143
1081754	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1081764	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117051
1081673	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#116732
1081700	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1081522	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#116426
1075473	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#116745
1081650	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117140
1081647	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117128
1081549	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#116682
1081468	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117139
1081410	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#116411
1081406	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117135
1081380	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1081370	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1081319	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#115294
1081227	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117103
1081247	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1081241	dotnet/runtime	System.Runtime.Tests.WorkItemExecution
1081235	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117128
1081214	dotnet/runtime	System.Runtime.Tests.WorkItemExecution	#117125

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	0	33

[dotnet-policy-service]

Tagging subscribers to 'os-ios': @vitek-karas, @kotlarmilos, @ivanpovazan, @steveisok, @akoeplinger
See info in area-owners.md if you want to be subscribed.

[vitek-karas]

Possibly related to #116714 as well.

[kotlarmilos]

Stack trace of the failure:

warning: System.Runtime.Tests was compiled with optimization - stepping may behave oddly; variables may not be available.
(lldb) bt
warning: could not execute support code to read Objective-C class data in the process. This may reduce the quality of type information available.
* thread #12, name = '.NET TP Worker', stop reason = signal SIGBUS
  * frame #0: 0x000000010292de90 System.Runtime.Tests`sgen_try_alloc_obj_nolock(vtable=0x000000014ae660c0, size=20) at sgen-alloc.c:324 [opt]
    frame #1: 0x000000010292e144 System.Runtime.Tests`sgen_alloc_obj(vtable=0x000000014ae660c0, size=20) at sgen-alloc.c:446:8 [opt]
    frame #2: 0x0000000102a1f050 System.Runtime.Tests`mono_gc_alloc_obj(vtable=<unavailable>, size=<unavailable>) at sgen-mono.c:690:20 [opt]
    frame #3: 0x0000000102a11fa0 System.Runtime.Tests`mono_gc_alloc_handle_obj(vtable=<unavailable>, size=<unavailable>) at gc.c:1217:9 [opt]
    frame #4: 0x00000001029e1054 System.Runtime.Tests`mono_value_box_handle [inlined] mono_object_new_alloc_by_vtable(vtable=0x000000014ae660c0, error=0x000000016dc88688) at object.c:5507:23 [opt]
    frame #5: 0x00000001029e1044 System.Runtime.Tests`mono_value_box_handle(klass=0x000000014a3dbe60, value=0x000000016dc881e0, error=0x000000016dc88688) at object.c:6548:32 [opt]
    frame #6: 0x00000001029de18c System.Runtime.Tests`mono_value_box_checked(klass=0x000000014a3dbe60, value=0x000000016dc881e0, error=0x000000016dc88688) at object.c:6601:2 [opt]
    frame #7: 0x0000000102a33b40 System.Runtime.Tests`mono_jit_runtime_invoke(method=<unavailable>, obj=<unavailable>, params=<unavailable>, exc=<unavailable>, error=<unavailable>) at mini-runtime.c:0 [opt]
    frame #8: 0x00000001029d64f4 System.Runtime.Tests`mono_runtime_invoke_checked [inlined] do_runtime_invoke(method=0x000000014ad95150, obj=0x0000000000000000, params=0x000000016dc886d8, exc=0x0000000000000000, error=0x000000016dc88688) at object.c:2572:11 [opt]
    frame #9: 0x00000001029d64b8 System.Runtime.Tests`mono_runtime_invoke_checked(method=0x000000014ad95150, obj=0x0000000000000000, params=0x000000016dc886d8, error=0x000000016dc88688) at object.c:2788:9 [opt]
    frame #10: 0x0000000102a390dc System.Runtime.Tests`mono_gsharedvt_constrained_call(mp=<unavailable>, cmethod=<unavailable>, klass=<unavailable>, info=<unavailable>, deref_args="\U00000001", args=0x000000016dc886d8) at jit-icalls.c:1499:6 [opt]
    frame #11: 0x0000000103914930 System.Runtime.Tests`wrapper_managed_to_native_object___icall_wrapper_mono_gsharedvt_constrained_call_intptr_intptr_intptr_intptr_intptr_intptr + 160
    frame #12: 0x0000000102ed8e30 System.Runtime.Tests`System_Linq_Enumerable_RangeSelectIterator_2_T_GSHAREDVT_TResult_GSHAREDVT_Fill_System_Span_1_TResult_GSHAREDVT_T_GSHAREDVT_System_Func_2_T_GSHAREDVT_TResult_GSHAREDVT(results=<unavailable>, start=<unavailable>, func=0x000000010c3a0da8) at <unknown>:1
    frame #13: 0x000000010399e73c System.Runtime.Tests`gsharedvt_trampoline + 220
    frame #14: 0x000000010399edbc System.Runtime.Tests`gsharedvt_out_trampoline + 220
    frame #15: 0x0000000102ed8afc System.Runtime.Tests`System_Linq_Enumerable_RangeSelectIterator_2_T_GSHAREDVT_TResult_GSHAREDVT_ToArray(this=0x000000010c117d60) at <unknown>:1
    frame #16: 0x000000010549a86c System.Runtime.Tests`System_Linq_Enumerable_ToArray_TSource_CHAR_System_Collections_Generic_IEnumerable_1_TSource_CHAR(source=0x000000010c117d60) at <unknown>:1
    frame #17: 0x00000001040b2cf8 System.Runtime.Tests`System_Tests_StringTests_NonRandomizedGetHashCode_EquivalentForStringAndSpan_int_bool(charValueLimit=65535, ignoreCase=false) at StringTests.cs:1007
    frame #18: 0x000000010390eb08 System.Runtime.Tests`wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 296
    frame #19: 0x0000000102a33ab4 System.Runtime.Tests`mono_jit_runtime_invoke(method=<unavailable>, obj=<unavailable>, params=<unavailable>, exc=<unavailable>, error=<unavailable>) at mini-runtime.c:3648:3 [opt]
    frame #20: 0x00000001029d64f4 System.Runtime.Tests`mono_runtime_invoke_checked [inlined] do_runtime_invoke(method=0x000000014be558c8, obj=0x0000000000000000, params=0x000000016de81ac0, exc=0x0000000000000000, error=0x000000016de81b90) at object.c:2572:11 [opt]
    frame #21: 0x00000001029d64b8 System.Runtime.Tests`mono_runtime_invoke_checked(method=0x000000014be558c8, obj=0x0000000000000000, params=0x000000016de81ac0, error=0x000000016de81b90) at object.c:2788:9 [opt]
    frame #22: 0x00000001029de828 System.Runtime.Tests`mono_runtime_try_invoke_byrefs(method=0x000000014be558c8, obj=<unavailable>, params_byref=0x000000016de81d90, exc=0x0000000000000000, error=0x000000016de81b90) at object.c:5209:16 [opt]
    frame #23: 0x00000001029983c0 System.Runtime.Tests`ves_icall_InternalInvoke(method_handle=<unavailable>, this_arg_handle=<unavailable>, params_byref=0x000000016de81d90, exception_out=MonoExceptionHandleOut @ x22, error=0x000000016de81b90) at icall.c:3667:11 [opt]
    frame #24: 0x00000001029a2388 System.Runtime.Tests`ves_icall_InternalInvoke_raw(a0=0x000000016de81c40, a1=0x000000016de81c48, a2=0x000000016de81d90, a3=0x000000016de81cc8) at icall-def.h:369:1 [opt]
    frame #25: 0x0000000103611920 System.Runtime.Tests`wrapper_managed_to_native_System_Reflection_RuntimeMethodInfo_InternalInvoke_object_intptr__System_Exception_ + 160
    frame #26: 0x0000000103603028 System.Runtime.Tests`System_Reflection_MethodBaseInvoker_InterpretedInvoke_Method_object_intptr_ + 120
    frame #27: 0x0000000103604514 System.Runtime.Tests`System_Reflection_MethodBaseInvoker_InvokeDirectByRefWithFewArgs_object_System_Span_1_object_System_Reflection_BindingFlags + 420
    frame #28: 0x00000001036041e8 System.Runtime.Tests`System_Reflection_MethodBaseInvoker_InvokeWithFewArgs_object_System_Reflection_BindingFlags_System_Reflection_Binder_object___System_Globalization_CultureInfo + 1720
    frame #29: 0x0000000103614024 System.Runtime.Tests`System_Reflection_RuntimeMethodInfo_Invoke_object_System_Reflection_BindingFlags_System_Reflection_Binder_object___System_Globalization_CultureInfo + 708
    frame #30: 0x0000000103614024 System.Runtime.Tests`System_Reflection_RuntimeMethodInfo_Invoke_object_System_Reflection_BindingFlags_System_Reflection_Binder_object___System_Globalization_CultureInfo + 708