[Mono-list] yield

[Atsushi Eno]

Hi,

It looks like a bug in mcs (compiler), so it would be great if you
file this bug to http://bugzilla.ximian.com .

mcs does not (well, should not) expose its stack trace even if you
wrote incorrect code :-)

Atsushi Eno


Bernhard Herzog wrote:
> Hello,
> 
> I wanted to use yield (like Miguel did it in HttpApplication), but I 
> need to lock by data. Is this not allowed?
> 
> static object lockit = new Object();
> 
> public static IEnumerable GetData()
> {
>  lock (lockit)
>  {
>   for (int i = 0; i < 10; i++)
>    yield return true;
>  }
> }
> 
> I am getting this error (with Mono, it works with MS.Net):
> 
> Unhandled Exception: System.Exception: Trying to emit a local from a 
> different ILGenerator.
> in <0x005e7> System.Reflection.Emit.ILGenerator:Emit (OpCode opcode, 
> System.Reflection.Emit.LocalBuilder lbuilder)
> in <0x0002e> Mono.CSharp.Lock:EmitFinally (Mono.CSharp.EmitContext ec)
> in <0x001bd> Mono.CSharp.Iterator:EmitDispose (Mono.CSharp.EmitContext ec)
> in <0x00013> Mono.CSharp.Iterator+DisposeMethod:DoEmit 
> (Mono.CSharp.EmitContext ec)
> in <0x00024> Mono.CSharp.Statement:Emit (Mono.CSharp.EmitContext ec)
> in <0x000a8> Mono.CSharp.Block:DoEmit (Mono.CSharp.EmitContext ec)
> in <0x00254> Mono.CSharp.Block:Emit (Mono.CSharp.EmitContext ec)
> in <0x0001b> Mono.CSharp.EmitContext:EmitResolvedTopBlock 
> (Mono.CSharp.ToplevelBlock block, Boolean unreachable)
> in <0x00068> Mono.CSharp.EmitContext:EmitTopBlock (IMethodData md, 
> Mono.CSharp.ToplevelBlock block, Mono.CSharp.InternalParameters ip)
> in <0x001f2> Mono.CSharp.MethodData:Emit (Mono.CSharp.TypeContainer 
> container, Mono.CSharp.Attributable kind)
> in <0x00029> Mono.CSharp.Method:Emit ()
> in <0x0064d> Mono.CSharp.TypeContainer:EmitType ()
> in <0x012a4> Mono.CSharp.TypeContainer:EmitType ()
> in <0x00225> Mono.CSharp.RootContext:EmitCode ()
> in <0x00c63> Mono.CSharp.Driver:MainDriver (System.String[] args)
> in <0x0000f> Mono.CSharp.Driver:Main (System.String[] args)
> 
> TIA
> Bernhard
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