[Mono-bugs] [Bug 565127] New: GetGenericParameterConstraints fails on methods in dynamic modules

[bugzilla_noreply at novell.com]

http://bugzilla.novell.com/show_bug.cgi?id=565127

http://bugzilla.novell.com/show_bug.cgi?id=565127#c0


           Summary: GetGenericParameterConstraints fails on methods in
                    dynamic modules
    Classification: Mono
           Product: Mono: Runtime
           Version: 2.6.x
          Platform: x86
        OS/Version: Windows 7
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: generics
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: tomas.matousek at microsoft.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


Created an attachment (id=332911)
 --> (http://bugzilla.novell.com/attachment.cgi?id=332911)
Compiled code

User-Agent:       Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1;
Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729;
Media Center PC 6.0; InfoPath.3; MS-RTC LM 8; MALC)

using System;
using System.Reflection;
using System.Reflection.Emit;

namespace ConsoleApplication1 {
    class Program {
        static void Main(string[] args) {
            var ab = AppDomain.CurrentDomain.DefineDynamicAssembly(new
AssemblyName("foo"), AssemblyBuilderAccess.Run);
            var modb = ab.DefineDynamicModule("foo");
            var tb = modb.DefineType("C", TypeAttributes.Class |
TypeAttributes.Public);
            var mb = tb.DefineMethod("m", MethodAttributes.Public |
MethodAttributes.Static);
            var gps = mb.DefineGenericParameters("T");
            mb.SetParameters(gps);
            mb.SetReturnType(typeof(void));
            var il = mb.GetILGenerator();
            il.Emit(OpCodes.Ret);
            var ti = tb.CreateType();
            var mi = ti.GetMethod("m");
            var mii = mi.MakeGenericMethod(typeof(int));
            foreach (var t in mii.GetGenericMethodDefinition().GetParameters())
{
                Console.WriteLine(t);
                foreach (var c in
t.ParameterType.GetGenericParameterConstraints()) {
                    Console.WriteLine(c);
                }
            }
        }
    }
}


Reproducible: Always

Steps to Reproduce:
1. compile and run the code above or run the attached .exe

Actual Results:  
Crash:
Unhandled Exception: System.InvalidOperationException: Operation is not valid
due to the current state of the object
  at
System.Reflection.Emit.GenericTypeParameterBuilder.GetGenericParameterConstraints
() [0x00000] in <filename unknown
>:0
  at ConsoleApplication1.Program.Main (System.String[] args) [0x00000] in
<filename unknown>:0

Expected Results:  
T

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