possible fix for problems mentioned in 3ba0ba57f8

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Parser/Parser.cs

@@ -170,7 +170,11 @@ namespace CSharpBinding.Parser
 			if (csParseInfo == null)
 				throw new ArgumentException("Parse info does not have SyntaxTree");
 			
-			return ResolveAtLocation.Resolve(compilation, csParseInfo.UnresolvedFile, csParseInfo.SyntaxTree, location, cancellationToken);
+			CSharpUnresolvedFile unresolvedFile = csParseInfo.UnresolvedFile;
+			IProject project = SD.ProjectService.FindProjectContainingFile(new FileName(unresolvedFile.FileName));
+			if (project == null || compilation.Assemblies.All(asm => asm.GetProject() != project))
+				unresolvedFile = null;
+			return ResolveAtLocation.Resolve(compilation, unresolvedFile, csParseInfo.SyntaxTree, location, cancellationToken);
 		}
 		
 		public void FindLocalReferences(ParseInformation parseInfo, ITextSource fileContent, IVariable variable, ICompilation compilation, Action<SearchResultMatch> callback, CancellationToken cancellationToken)

src/AddIns/Debugger/Debugger.AddIn/Service/WindowsDebugger.cs

@@ -641,7 +641,9 @@ namespace ICSharpCode.SharpDevelop.Services
 		{
 			if (!(IsDebugging && CurrentProcess.IsPaused))
 				return;
-			var resolveResult = e.ResolveResult;
+			if (CurrentStackFrame == null)
+				return;
+			var resolveResult = SD.ParserService.Resolve(e.Editor, e.LogicalPosition, CurrentStackFrame.AppDomain.Compilation);
 			if (resolveResult == null)
 				return;
 			if (resolveResult is LocalResolveResult || resolveResult is MemberResolveResult) {