Fix void and no-arguments methods

ICSharpCode.Decompiler/IL/Transforms/ProxyCallReplacer.cs

@@ -36,12 +36,25 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 						if (blockContainer.Blocks.Count != 1)
 							return;
 						var block = blockContainer.Blocks[0];
-						if (block.Instructions.Count != 1)
-							return;
+						Call call = null;
+						if (block.Instructions.Count == 1) {
+							// leave IL_0000 (call Test(ldloc this, ldloc A_1))
 							if (!block.Instructions[0].MatchLeave(blockContainer, out ILInstruction returnValue))
 								return;
-						if (!(returnValue is Call call))
+							call = returnValue as Call;
+						} else if (block.Instructions.Count == 2) {
+							// call Test(ldloc this, ldloc A_1)
+							// leave IL_0000(nop)
+							call = block.Instructions[0] as Call;
+							if (!block.Instructions[1].MatchLeave(blockContainer, out ILInstruction returnValue))
+								return;
+							if (!returnValue.MatchNop())
+								return;
+						}
+						if (call == null) {
 							return;
+						}
+
 						// check if original arguments are only correct ldloc calls
 						for (int i = 0; i < call.Arguments.Count; i++) {
 							var originalArg = call.Arguments[i];
@@ -56,6 +69,7 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 
 						newInst.Arguments.Clear();
 
+						if (inst.Arguments.Count > 0) {
 							ILInstruction thisArg = inst.Arguments[0];
 
 							// special handling for first argument (this) - the underlying issue may be somewhere else
@@ -76,6 +90,7 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 							for (int i = 1; i < inst.Arguments.Count; i++) {
 								newInst.Arguments.Add(inst.Arguments[i]);
 							}
+						}
 						inst.ReplaceWith(newInst);
 					}
 				}