Hook AssemblyResolve.Warning event to suppress the HigherVersion event, as we don't care about that one in this scenario.

Added check to avoid running on ourself, because it results in an exception.

ikvmstub/ikvmstub.cs

@@ -102,8 +102,9 @@ static class NetExp
 			// This allows "ikvmstub -nostdlib \...\mscorlib.dll" to work.
 			references.Add(assemblyNameOrPath);
 		}
+		StaticCompiler.Resolver.Warning += new AssemblyResolver.WarningEvent(Resolver_Warning);
 		StaticCompiler.Resolver.Init(StaticCompiler.Universe, nostdlib, references, libpaths);
-		StaticCompiler.LoadFile(typeof(NetExp).Assembly.Location);
+		Assembly ikvmstubAssembly = StaticCompiler.LoadFile(typeof(NetExp).Assembly.Location);
 		Dictionary<string, Assembly> cache = new Dictionary<string, Assembly>();
 		foreach (string reference in references)
 		{
@@ -141,6 +142,13 @@ static class NetExp
 		{
 			if (AttributeHelper.IsJavaModule(assembly.ManifestModule))
 			{
+				if (assembly == ikvmstubAssembly)
+				{
+					// we'll crash if we allow this, because CompiledTypeWrapper cannot handle .NET types that use features that we don't expose in Java
+					// (e.g. the ReadPackedInteger(ref int position) method in LineNumberTableAttribute)
+					Console.Error.WriteLine("Error: you cannot run ikvmstub on itself");
+					return 1;
+				}
 				Console.Error.WriteLine("Warning: Running ikvmstub on ikvmc compiled assemblies is not supported.");
 			}
 			try
@@ -202,6 +210,14 @@ static class NetExp
 		return rc;
 	}
 
+	static void Resolver_Warning(AssemblyResolver.WarningId warning, string message, string[] parameters)
+	{
+		if (warning != AssemblyResolver.WarningId.HigherVersion)
+		{
+			Console.Error.WriteLine("Warning: " + message, parameters);
+		}
+	}
+
 	private static string GetVersionAndCopyrightInfo()
 	{
 		System.Reflection.Assembly asm = System.Reflection.Assembly.GetEntryAssembly();