[wasm] System.Linq.Expressions tests fail with "System.BadImageFormatException : Method has no body"

[MaximLipnin]

While running on Browser WASM, several System.Linq.Expressions tests, invoking Expression.Compile(true), fail with something like:

<message><![CDATA[System.BadImageFormatException : Method has no body]]></message>
<stack-trace><![CDATA[   at System.Delegate.CreateDelegate(Type type, Object firstArgument, MethodInfo method, Boolean throwOnBindFailure, Boolean allowClosed)
   at System.Delegate.CreateDelegate(Type type, MethodInfo method, Boolean throwOnBindFailure)
   at System.Delegate.CreateDelegate(Type type, MethodInfo method)
   at System.Reflection.RuntimeMethodInfo.CreateDelegate(Type delegateType)
   at System.Linq.Expressions.Interpreter.FuncCallInstruction`2[[System.Linq.Expressions.Tests.CallTests.Interface1, System.Linq.Expressions.Tests, Version=5.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51],[System.Int32, System.Private.CoreLib, Version=5.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]]..ctor(MethodInfo target)
   at System.Reflection.RuntimeConstructorInfo.InternalInvoke(Object obj, Object[] parameters, Boolean wrapExceptions)
--- End of stack trace from previous location ---
   at System.Linq.Expressions.Interpreter.ExceptionHelpers.UnwrapAndRethrow(TargetInvocationException exception)
   at System.Linq.Expressions.Interpreter.CallInstruction.SlowCreate(MethodInfo info, ParameterInfo[] pis)
   at System.Linq.Expressions.Interpreter.CallInstruction.FastCreate(MethodInfo target, ParameterInfo[] pi)
   at System.Linq.Expressions.Interpreter.CallInstruction.Create(MethodInfo info, ParameterInfo[] parameters)
   at System.Linq.Expressions.Interpreter.InstructionList.EmitCall(MethodInfo method, ParameterInfo[] parameters)
   at System.Linq.Expressions.Interpreter.LightCompiler.CompileMethodCallExpression(Expression object, MethodInfo method, IArgumentProvider arguments)
   at System.Linq.Expressions.Interpreter.LightCompiler.CompileMethodCallExpression(Expression expr)
   at System.Linq.Expressions.Interpreter.LightCompiler.CompileNoLabelPush(Expression expr)
   at System.Linq.Expressions.Interpreter.LightCompiler.Compile(Expression expr)
   at System.Linq.Expressions.Interpreter.LightCompiler.CompileTop(LambdaExpression node)
   at System.Linq.Expressions.LambdaExpression.Compile(Boolean preferInterpretation)
   at System.Linq.Expressions.Tests.CallTests.Call_NoParameters(Expression instance, MethodInfo method, Object expected, Boolean useInterpreter)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)]]>
</stack-trace>
</failure>

STR:

1. Set up prereqs to build for wasm/browser (docs)
2. Build for wasm/browser ./build.sh --arch wasm --os Browser --configuration release
3. Install V8 to run the library tests (docs)
4. Run System.Linq.Expressions library test suite ./dotnet.sh build src/libraries/System.Linq.Expressions/tests/ /t:Test /p:TargetOS=Browser /p:TargetArchitecture=wasm /p:Configuration=release

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[kg]

I tried to repro this using your steps but the last one (running the test suite) fails:

  Restored /home/kate/Projects/dotnet-runtime-wasm/src/libraries/System.Linq.Expressions/tests/System.Linq.Expressions.Tests.csproj (in 4.32 sec).
/home/kate/Projects/dotnet-runtime-wasm/.dotnet/sdk/5.0.100-preview.8.20362.3/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(379,5): error NETSDK1112: The runtime pack for Microsoft.NETCore.App.Runtime.browser-wasm was not downloaded. Try running a NuGet restore with the RuntimeIdentifier 'browser-wasm'. [/home/kate/Projects/dotnet-runtime-wasm/src/libraries/System.Linq.Expressions/tests/System.Linq.Expressions.Tests.csproj]

Build FAILED.

Did you set some environment variables to make it use the build from artifacts/?

[MaximLipnin]

No, I didn't set any environment variables besides EMSDK_PATH and PATH for jsvu-v8, mentioned in the docs from repro steps.

[MaximLipnin]

There is no repro, the tests are enabled in #40130