[Mono-devel-list] some bogus code that makes mcs throw an exception

[Sean Neakums]

$ dpkg -s mono-mcs | grep ^Version:
Version: 1.0-1
$ mcs --version
Mono C# compiler version 1.0.0.0
$ cat foo.cs
using System;
using System.Collections;

class foo {
	private static void Up(Hashtable h, String x, String y)
	{
		try {
			h[x + "/" + y] = h[x + "/" + y]++;
		} catch {
			h[x + "/" + y] = 1;
		}
	}

	public static void Main()
	{
		Hashtable y = new Hashtable ();
		Up(y, "foo", "bar");
		Up(y, "foo", "bar");
	}
}
$ mcs foo.cs
Exception caught by the compiler while compiling:
   Block that caused the problem begin at: foo.cs: (5)
                     Block being compiled: [foo.cs: (7),foo.cs: (9)]
System.InvalidCastException: Cannot cast from source type to destination type.
	in StringConcat.Emit (Mono.CSharp.EmitContext)
	in EmptyCast.Emit (Mono.CSharp.EmitContext)
	in Argument.Emit (Mono.CSharp.EmitContext)
	in Invocation.EmitArguments (Mono.CSharp.EmitContext, System.Reflection.MethodBase, System.Collections.ArrayList)
	in Invocation.EmitCall (Mono.CSharp.EmitContext, bool, bool, Mono.CSharp.Expression, System.Reflection.MethodBase, System.Collections.ArrayList, Mono.CSharp.Location)
	in IndexerAccess.EmitAssign (Mono.CSharp.EmitContext, Mono.CSharp.Expression)
	in UnaryMutator.EmitCode (Mono.CSharp.EmitContext, bool)
	in UnaryMutator.Emit (Mono.CSharp.EmitContext)
	in Argument.Emit (Mono.CSharp.EmitContext)
	in Invocation.EmitArguments (Mono.CSharp.EmitContext, System.Reflection.MethodBase, System.Collections.ArrayList)
	in Invocation.EmitCall (Mono.CSharp.EmitContext, bool, bool, Mono.CSharp.Expression, System.Reflection.MethodBase, System.Collections.ArrayList, Mono.CSharp.Location)
	in IndexerAccess.EmitAssign (Mono.CSharp.EmitContext, Mono.CSharp.Expression)
	in Assign.Emit (Mono.CSharp.EmitContext, bool)
	in Assign.EmitStatement (Mono.CSharp.EmitContext)
	in StatementExpression.DoEmit (Mono.CSharp.EmitContext)
	in Statement.Emit (Mono.CSharp.EmitContext)
	in Block.DoEmit (Mono.CSharp.EmitContext)
	in Block.Emit (Mono.CSharp.EmitContext)
	in Try.DoEmit (Mono.CSharp.EmitContext)
	in Statement.Emit (Mono.CSharp.EmitContext)
	in Block.DoEmit (Mono.CSharp.EmitContext)
	in Block.Emit (Mono.CSharp.EmitContext)
	in EmitContext.EmitTopBlock (Mono.CSharp.Block, Mono.CSharp.InternalParameters, Mono.CSharp.Location)