Fix #211 InvalidCastException in ILAstOptimizer.TransformArrayInitializers

ICSharpCode.Decompiler/ILAst/InitializerPeepholeTransforms.cs

@@ -124,19 +124,24 @@ namespace ICSharpCode.Decompiler.ILAst
 			MethodReference methodRef;
 			ILExpression methodArg1;
 			ILExpression methodArg2;
-			FieldDefinition field;
+			FieldReference fieldRef;
 			if (body.ElementAtOrDefault(pos).Match(ILCode.Call, out methodRef, out methodArg1, out methodArg2) &&
 			    methodRef.DeclaringType.FullName == "System.Runtime.CompilerServices.RuntimeHelpers" &&
 			    methodRef.Name == "InitializeArray" &&
 			    methodArg1.Match(ILCode.Ldloc, out v2) &&
 			    array == v2 &&
-			    methodArg2.Match(ILCode.Ldtoken, out field) &&
-			    field != null && field.InitialValue != null) {
-				ILExpression[] newArr = new ILExpression[arrayLength];
-				if (DecodeArrayInitializer(TypeAnalysis.GetTypeCode(arrayType.GetElementType()), field.InitialValue, newArr)) {
-					values = newArr;
-					foundPos = pos;
-					return true;
+			    methodArg2.Match(ILCode.Ldtoken, out fieldRef))
+			{
+				FieldDefinition fieldDef = fieldRef.ResolveWithinSameModule();
+				if (fieldDef != null && fieldDef.InitialValue != null) {
+					ILExpression[] newArr = new ILExpression[arrayLength];
+					if (DecodeArrayInitializer(TypeAnalysis.GetTypeCode(arrayType.GetElementType()),
+					                           fieldDef.InitialValue, newArr))
+					{
+						values = newArr;
+						foundPos = pos;
+						return true;
+					}
 				}
 			}
 			values = null;