From dd4e5f9ea96d9f1f31cb6b98bda9457697325af3 Mon Sep 17 00:00:00 2001
From: Daniel Grunwald <daniel@danielgrunwald.de>
Date: Sun, 23 Apr 2006 19:23:05 +0000
Subject: [PATCH] Fixed crash when parsing incomplete Imports statement.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/2.0@1353 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61
---
 .../Project/Src/Parser/VBNet/Parser.cs         |  4 ++--
 .../Project/Src/Parser/VBNet/VBNET.ATG         |  4 ++--
 .../GlobalScope/UsingDeclarationTests.cs       | 18 ++++++++++++++++++
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/src/Libraries/NRefactory/Project/Src/Parser/VBNet/Parser.cs b/src/Libraries/NRefactory/Project/Src/Parser/VBNet/Parser.cs
index 9839ad27ba..ebab3c07a7 100644
--- a/src/Libraries/NRefactory/Project/Src/Parser/VBNet/Parser.cs
+++ b/src/Libraries/NRefactory/Project/Src/Parser/VBNet/Parser.cs
@@ -379,7 +379,7 @@ ref val);
 out u);
 
 #line  537 "VBNET.ATG" 
-		usings.Add(u); 
+		if (u != null) { usings.Add(u); } 
 		while (la.kind == 12) {
 			lexer.NextToken();
 			ImportClause(
@@ -387,7 +387,7 @@ out u);
 out u);
 
 #line  539 "VBNET.ATG" 
-			usings.Add(u); 
+			if (u != null) { usings.Add(u); } 
 		}
 		EndOfStmt();
 
diff --git a/src/Libraries/NRefactory/Project/Src/Parser/VBNet/VBNET.ATG b/src/Libraries/NRefactory/Project/Src/Parser/VBNet/VBNET.ATG
index 51c2d292fe..91214f8714 100644
--- a/src/Libraries/NRefactory/Project/Src/Parser/VBNet/VBNET.ATG
+++ b/src/Libraries/NRefactory/Project/Src/Parser/VBNet/VBNET.ATG
@@ -534,9 +534,9 @@ ImportsStmt
 		Point startPos = t.Location;
 		Using u;
 	.)
-	ImportClause<out u> (. usings.Add(u); .)
+	ImportClause<out u> (. if (u != null) { usings.Add(u); } .)
 	{
-		"," ImportClause<out u> (. usings.Add(u); .)
+		"," ImportClause<out u> (. if (u != null) { usings.Add(u); } .)
 	}
 	EndOfStmt
 	(.
diff --git a/src/Libraries/NRefactory/Test/Parser/GlobalScope/UsingDeclarationTests.cs b/src/Libraries/NRefactory/Test/Parser/GlobalScope/UsingDeclarationTests.cs
index b2d1a4c33f..37611bedde 100644
--- a/src/Libraries/NRefactory/Test/Parser/GlobalScope/UsingDeclarationTests.cs
+++ b/src/Libraries/NRefactory/Test/Parser/GlobalScope/UsingDeclarationTests.cs
@@ -107,7 +107,25 @@ namespace ICSharpCode.NRefactory.Tests.AST
 			IParser parser = ParserFactory.CreateParser(SupportedLanguage.VBNet, new StringReader(program));
 			parser.Parse();
 			Assert.IsTrue(parser.Errors.count > 0);
+			UsingDeclaration u = (UsingDeclaration)parser.CompilationUnit.Children[0];
+			foreach (Using us in u.Usings) {
+				Assert.IsNotNull(us);
+			}
 		}
+		
+		[Test]
+		public void VBNetWrongUsing2Test()
+		{
+			string program = "Imports ,\n";
+			IParser parser = ParserFactory.CreateParser(SupportedLanguage.VBNet, new StringReader(program));
+			parser.Parse();
+			Assert.IsTrue(parser.Errors.count > 0);
+			UsingDeclaration u = (UsingDeclaration)parser.CompilationUnit.Children[0];
+			foreach (Using us in u.Usings) {
+				Assert.IsNotNull(us);
+			}
+		}
+		
 		[Test]
 		public void VBNetDeclarationTest()
 		{