Fixed null reference exception that occurs when a Python method is missing its last parameter.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@3001 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/BackendBindings/Python/PythonBinding/Project/Src/PythonAstWalker.cs

@@ -180,8 +180,10 @@ namespace ICSharpCode.PythonBinding
 			// Ignore first parameter since this is the "self" parameter.
 			for (int i = 1; i < expressions.Count; ++i) {
 				NameExpression expression = expressions[i] as NameExpression;
-				DefaultParameter parameter = new DefaultParameter(expression.Name.ToString(), null, new DomRegion());
-				parameters.Add(parameter);
+				if (expression != null) {
+					DefaultParameter parameter = new DefaultParameter(expression.Name.ToString(), null, new DomRegion());
+					parameters.Add(parameter);
+				}
 			}
 			return parameters.ToArray();
 		}

src/AddIns/BackendBindings/Python/PythonBinding/Test/Parsing/MissingLastParameterFromMethodTestFixture.cs

@@ -0,0 +1,42 @@
+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="Matthew Ward" email="mrward@users.sourceforge.net"/>
+//     <version>$Revision$</version>
+// </file>
+
+using System;
+using ICSharpCode.PythonBinding;
+using ICSharpCode.SharpDevelop.Dom;
+using NUnit.Framework;
+using PythonBinding.Tests;
+
+namespace PythonBinding.Tests.Parsing
+{
+	/// <summary>
+	/// Tests that the python parser does not throw an exception
+	/// when the last parameter is missing from a method.
+	/// </summary>
+	[TestFixture]
+	public class MissingLastParameterFromMethodTestFixture
+	{
+		ICompilationUnit compilationUnit;
+		
+		[TestFixtureSetUp]
+		public void SetUpFixture()
+		{
+			string python = "class Class1:\r\n" +
+							"    def method(arg1,arg2,";
+			
+			DefaultProjectContent projectContent = new DefaultProjectContent();
+			PythonParser parser = new PythonParser();
+			compilationUnit = parser.Parse(projectContent, @"C:\test.py", python);
+		}
+		
+		[Test]
+		public void CompilationUnitIsNotNull()
+		{
+			Assert.IsNotNull(compilationUnit);
+		}
+	}
+}

src/AddIns/BackendBindings/Python/PythonBinding/Test/PythonBinding.Tests.csproj

@@ -130,6 +130,7 @@
     <Compile Include="Parsing\ClassWithBaseClassTestFixture.cs" />
     <Compile Include="Parsing\IronPythonParserTestFixture.cs" />
     <Compile Include="Parsing\MethodWithParametersTestFixture.cs" />
+    <Compile Include="Parsing\MissingLastParameterFromMethodTestFixture.cs" />
     <Compile Include="Parsing\ParseClassWithCtorTestFixture.cs" />
     <Compile Include="Parsing\ParseClassWithMethodTestFixture.cs" />
     <Compile Include="Parsing\ParseImportTestFixture.cs" />