[browser] Could not resolve type with token 01000001 from typeref

[pavelsavara]

Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1381687
Build error leg or test failing: WasmTestOnChrome-MONO-ST-System.Linq.Tests

Error Message

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

{
  "ErrorMessage": "Could not resolve type with token",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1381687
Error message validated: [Could not resolve type with token]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 4/16/2026 11:19:50 AM UTC

Report

Summary

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

[dotnet-policy-service]

Tagging subscribers to 'arch-wasm': @lewing, @pavelsavara
See info in area-owners.md if you want to be subscribed.

[pavelsavara]

Log

[13:03:32] info: MONO_WASM: Could not resolve type with token 01000001 from typeref (expected class 'System.Runtime.CompilerServices.ExtensionAttribute' in assembly 'System.Runtime, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
                    at Xunit.Xunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at YieldingXunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at Microsoft.DotNet.XHarness.TestRunners.Xunit.CustomXunitTestRunner.Run(IEnumerable`1 testAssemblies)
                    at Xunit.Xunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at YieldingXunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at Microsoft.DotNet.XHarness.TestRunners.Common.ApplicationEntryPoint.InternalRunAsync(LogWriter logger)
                    at Xunit.Xunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at YieldingXunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at Microsoft.DotNet.XHarness.TestRunners.Common.ApplicationEntryPoint.InternalRunAsync(ApplicationOptions options, TextWriter loggerWriter, TextWriter resultsFile)
                    at Xunit.Xunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at YieldingXunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at Microsoft.DotNet.XHarness.TestRunners.Common.WasmApplicationEntryPointBase.RunAsync()
                    at Xunit.Xunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at YieldingXunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at Microsoft.DotNet.XHarness.TestRunners.Xunit.WasmApplicationEntryPoint.Run()
                    at Xunit.Xunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at YieldingXunit2..ctor(AppDomainSupport appDomainSupport, ISourceInformationProvider sourceInformationProvider, String assemblyFileName, String configFileName, Boolean shadowCopy, String shadowCopyFolder, IMessageSink diagnosticMessageSink, Boolean verifyTestAssemblyExists)
                    at WasmTestRunner.MainAsync(String[] args)
                 Error: Could not resolve type with token 01000001 from typeref (expected class 'System.Runtime.CompilerServices.ExtensionAttribute' in assembly 'System.Runtime, Version=11.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
                     at cn (http://127.0.0.1:43151/_framework/dotnet.runtime.fwvcv673c7.js:3:27639)
                     at en.resolve_or_reject (http://127.0.0.1:43151/_framework/dotnet.runtime.fwvcv673c7.js:3:27195)
                     at http://127.0.0.1:43151/_framework/dotnet.runtime.fwvcv673c7.js:3:175959
                     at http://127.0.0.1:43151/_framework/dotnet.runtime.fwvcv673c7.js:3:176018
                     at fr (http://127.0.0.1:43151/_framework/dotnet.runtime.fwvcv673c7.js:3:36189)
                     at xc (http://127.0.0.1:43151/_framework/dotnet.runtime.fwvcv673c7.js:3:175603)
                     at aot_wrapper_System_dot_Runtime_dot_InteropServices_dot_JavaScript_System_dot_Runtime_dot_InteropServices_dot_JavaScript__Interop_sl_Runtime__ResolveOrRejectPromise_pinvoke_void_iivoid_ii (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[21593]:0x71b785)
                     at System_Runtime_InteropServices_JavaScript_System_Runtime_InteropServices_JavaScript_JSMarshalerArgument_RejectPromise_System_Runtime_InteropServices_JavaScript_JSObject_System_Exception (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[21770]:0x728e2b)
                     at aot_instances_aot_wrapper_gsharedvt_out_sig_void_objobj (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[37616]:0xa4624a)
                     at jit_call_cb (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[56463]:0xed9a25)
                     at mono_llvm_cpp_catch_exception (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[59689]:0xfcb6e6)
                     at mono_llvm_catch_exception (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[59741]:0xfcfd3e)
                     at do_jit_call (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[56383]:0xed644d)
                     at mono_interp_exec_method (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[56378]:0xec923c)
                     at interp_entry (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[56457]:0xed96ae)
                     at interp_entry_static_2 (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[56495]:0xeda984)
                     at aot_instances_aot_wrapper_gsharedvt_in_sig_void_objobj (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[37791]:0xa4d5b3)
                     at corlib_wrapper_delegate_invoke_System_Action_2_T1_REF_T2_REF_invoke_void_T1_T2_T1_REF_T2_REF (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[37107]:0xa30e42)
                     at corlib_System_Threading_Tasks_ContinuationTaskFromResultTask_1_TAntecedentResult_GSHAREDVT_InnerInvoke (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[36393]:0xa0f388)
                     at corlib_System_Threading_Tasks_Task__c___cctorb__289_0_object (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[31805]:0x9061ac)
                     at corlib_wrapper_delegate_invoke__Module_invoke_void_object_object (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[37376]:0xa3c76c)
                     at corlib_System_Threading_ExecutionContext_RunFromThreadPoolDispatchLoop_System_Threading_Thread_System_Threading_ExecutionContext_System_Threading_ContextCallback_object (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[31041]:0x8dea0c)
                     at corlib_System_Threading_Tasks_Task_ExecuteWithThreadLocal_System_Threading_Tasks_Task__System_Threading_Thread (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[31679]:0x8fcc0d)
                     at corlib_System_Threading_Tasks_Task_ExecuteEntryUnsafe_System_Threading_Thread (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[31681]:0x8fd05d)
                     at corlib_System_Threading_Tasks_Task_ExecuteFromThreadPool_System_Threading_Thread (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[31680]:0x8fcf49)
                     at corlib_System_Threading_ThreadPoolWorkQueue_DispatchWorkItem_object_System_Threading_Thread (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[31370]:0x8ebbae)
                     at corlib_System_Threading_ThreadPoolWorkQueue_Dispatch (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[31368]:0x8eb7f7)
                     at corlib_System_Threading_ThreadPool_BackgroundJobHandler (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[31404]:0x8ed449)
                     at corlib_wrapper_native_to_managed_System_Threading_ThreadPool_BackgroundJobHandler (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[37451]:0xa3fbce)
                     at mono_background_exec (http://127.0.0.1:43151/_framework/dotnet.native.y8yaw1sk2c.wasm:wasm-function[57218]:0xf07f1e)
                     at qo (http://127.0.0.1:43151/_framework/dotnet.runtime.fwvcv673c7.js:3:57591)
                     at callUserCallback (http://127.0.0.1:43151/_framework/dotnet.native.703ks6jnsl.js:8:99271)
                     at http://127.0.0.1:43151/_framework/dotnet.native.703ks6jnsl.js:8:99539
[13:03:32] info: WASM EXIT 1

[pavelsavara]

Could this be the root cause #123439

[radekdoulik]

Or possibly this #125673, it is the oldest PR which hit the problem I found so far.

[pavelsavara]

@kotlarmilos do you think that we need similar fix as your #126988 for wasm ?

[kotlarmilos]

Yes, the tests assembly isn't rooted after #125673