Merge pull request #9359 from mono/jstedfast-debugger-dont-evaluate-n…

…ull-expressions

[Debugger] Don't evaluate null expressions in the tooltip logic

main/src/addins/MonoDevelop.Debugger/MonoDevelop.Debugger.VSTextView/QuickInfo/DebuggerQuickInfoSource.cs

@@ -110,7 +110,7 @@ public async Task<QuickInfoItem> GetQuickInfoItemAsync (IAsyncQuickInfoSession s
 					debugInfo = await debugInfoProvider.Value.GetDebugInfoAsync (point, cancellationToken);
 				}
 
-				if (!debugInfo.IsDefault) {
+				if (!debugInfo.IsDefault && debugInfo.Text != null) {
 					await EvaluateAndShowTooltipAsync (session, view, point, debugInfo, cancellationToken);
 					return null;
 				}