Add test case for #180.

ICSharpCode.Decompiler/Tests/CorrectnessTestRunner.cs

@@ -131,6 +131,12 @@ namespace ICSharpCode.Decompiler.Tests
 			RunCS(options: options);
 		}
 
+		[Test]
+		public void OverloadResolution([ValueSource("defaultOptions")] CompilerOptions options)
+		{
+			RunCS(options: options);
+		}
+
 		[Test]
 		public void BitNot()
 		{

ICSharpCode.Decompiler/Tests/ICSharpCode.Decompiler.Tests.csproj

@@ -126,6 +126,7 @@
     <Compile Include="Helpers\TypeSystemHelper.cs" />
     <Compile Include="PrettyTestRunner.cs" />
     <Compile Include="RoundtripAssembly.cs" />
+    <Compile Include="TestCases\Correctness\OverloadResolution.cs" />
     <Compile Include="TestCases\Pretty\Async.cs" />
     <Compile Include="TestCases\Correctness\CompoundAssignment.cs" />
     <Compile Include="TestCases\Correctness\ConditionalAttr.cs" />

ICSharpCode.Decompiler/Tests/TestCases/Correctness/OverloadResolution.cs

@@ -0,0 +1,51 @@
+// Copyright (c) 2016 Daniel Grunwald
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ICSharpCode.Decompiler.Tests.TestCases.Correctness
+{
+	static class OverloadResolution
+	{
+		static void Main()
+		{
+			CallIssue180();
+		}
+
+		static void CallIssue180()
+		{
+			Issue180(null);
+			Issue180(new object[1]);
+			Issue180((object)new object[1]);
+		}
+
+		static void Issue180(object obj)
+		{
+			Console.WriteLine("#180: object");
+		}
+
+		static void Issue180(params object[] objs)
+		{
+			Console.WriteLine("#180: params object[]");
+		}
+	}
+}