Crash in runtime-async compiler #77897
Description
Version: 4.14.0-3.25170.6
Top of the stack:
error : Process terminated. System.InvalidOperationException: Unexpected value 'AwaitExpression' of type 'Microsoft.CodeAnalysis.CSharp.BoundKind' [/home/andy/code/runtimelab/src/tests/async/fibonacci-with-yields.csproj]
error : at Microsoft.CodeAnalysis.CSharp.CodeGen.CodeGenerator.EmitExpressionCore(BoundExpression expression, Boolean used) [/home/andy/code/runtimelab/src/tests/async/fibonacci-with-yields.csproj]
error : at Microsoft.CodeAnalysis.CSharp.CodeGen.CodeGenerator.EmitExpressionCoreWithStackGuard(BoundExpression expression, Boolean used) [/home/andy/code/runtimelab/src/tests/async/fibonacci-with-yields.csproj]
error : at Microsoft.CodeAnalysis.CSharp.CodeGen.CodeGenerator.EmitExpression(BoundExpression expression, Boolean used) [/home/andy/code/runtimelab/src/tests/async/fibonacci-with-yields.csproj]
error : at Microsoft.CodeAnalysis.CSharp.CodeGen.CodeGenerator.EmitStatement(BoundStatement statement) [/home/andy/code/runtimelab/src/tests/async/fibonacci-with-yields.csproj]
error : at Microsoft.CodeAnalysis.CSharp.CodeGen.CodeGenerator.EmitStatementAndCountInstructions(BoundStatement statement) [/home/andy/code/runtimelab/src/tests/async/fibonacci-with-yields.csproj]
error : at Microsoft.CodeAnalysis.CSharp.CodeGen.CodeGenerator.EmitSequencePointStatement(BoundSequencePoint node) [/home/andy/code/runtimelab/src/tests/async/fibonacci-with-yields.csproj]
Source code:
[RuntimeAsyncMethodGeneration(true)]
static async Task<int> Fib(int i)
{
if (i <= 1)
{
if (doYields)
{
await Task.Yield();
}
return 1;
}
int i1 = await Fib(i - 1);
int i2 = await Fib(i - 2);
return i1 + i2;
}