Fix SD2-1584 - VB .NET snippet parser crashes on invalid syntax

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@4883 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/NRefactory/Project/Src/Parser/VBNet/Parser.cs

@@ -1854,18 +1854,17 @@ out implementsClause);
 		}
 		case 2: case 45: case 49: case 51: case 52: case 53: case 54: case 57: case 74: case 91: case 94: case 103: case 108: case 113: case 120: case 126: case 130: case 133: case 156: case 162: case 169: case 188: case 197: case 198: case 208: case 209: case 215: {
 
-#line  1026 "VBNET.ATG" 
-			Location startPos = t.Location; 
-
-#line  1028 "VBNET.ATG" 
+#line  1027 "VBNET.ATG" 
 			m.Check(Modifiers.Fields);
 			FieldDeclaration fd = new FieldDeclaration(attributes, null, m.Modifier);
-			fd.StartLocation = m.GetDeclarationLocation(startPos); 
 			
 			IdentifierForFieldDeclaration();
 
-#line  1032 "VBNET.ATG" 
+#line  1030 "VBNET.ATG" 
 			string name = t.val; 
+
+#line  1031 "VBNET.ATG" 
+			fd.StartLocation = m.GetDeclarationLocation(t.Location); 
 			VariableDeclaratorPartAfterIdentifier(
 #line  1033 "VBNET.ATG" 
 variableDeclarators, name);

src/Libraries/NRefactory/Project/Src/Parser/VBNet/VBNET.ATG

@@ -1023,13 +1023,13 @@ StructureMemberDecl<ModifierList m, List<AttributeSection> attributes>
 	.)
 	EndOfStmt
 | /* 9.6 */
-	(. Location startPos = t.Location; .)
 	(.
 		m.Check(Modifiers.Fields);
 		FieldDeclaration fd = new FieldDeclaration(attributes, null, m.Modifier);
-		fd.StartLocation = m.GetDeclarationLocation(startPos); 
 	.)
 	IdentifierForFieldDeclaration (. string name = t.val; .)
+	(. fd.StartLocation = m.GetDeclarationLocation(t.Location); .)
+	
 	VariableDeclaratorPartAfterIdentifier<variableDeclarators, name>
 	{ "," VariableDeclarator<variableDeclarators> }
 	EndOfStmt

src/Libraries/NRefactory/Test/NRefactoryTests.csproj

@@ -80,6 +80,7 @@
     <Compile Include="Parser\Expressions\StackAllocExpressionTests.cs" />
     <Compile Include="Parser\GlobalScope\UsingDeclarationTests.cs" />
     <Compile Include="Parser\GlobalScope\TypeDeclarationTests.cs" />
+    <Compile Include="Parser\SnippetParserTests.cs" />
     <Compile Include="Parser\TypeLevel\ConstructorDeclarationTests.cs" />
     <Compile Include="Parser\TypeLevel\EventDeclarationTests.cs" />
     <Compile Include="Parser\TypeLevel\FieldDeclarationTests.cs" />

src/Libraries/NRefactory/Test/Parser/SnippetParserTests.cs

@@ -0,0 +1,26 @@
+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="Daniel Grunwald"/>
+//     <version>$Revision$</version>
+// </file>
+
+using ICSharpCode.NRefactory.Ast;
+using System;
+using NUnit.Framework;
+
+namespace ICSharpCode.NRefactory.Tests
+{
+	[TestFixture]
+	public class SnippetParserTests
+	{
+		[Test]
+		public void InvalidExpressionSyntax()
+		{
+			// SD2-1584: ensure we don't crash on this invalid VB code
+			SnippetParser parser = new SnippetParser(SupportedLanguage.VBNet);
+			INode node = parser.Parse("i == 5");
+			Assert.IsTrue(parser.Errors.Count > 0);
+		}
+	}
+}