Fix the "Open File..." scenario (without a workspace folder) (#5054)

Fix the "Open File..." scenario (without a workspace folder)

Author: sean-mcmanus

Extension/CHANGELOG.md

@@ -1,5 +1,9 @@
 # C/C++ for Visual Studio Code Change Log
 
+## Version 0.27.0-insiders2: March 4, 2019
+### Bug Fixes
+* Fix the `Open File...` scenario (without a workspace folder). [#5049](https://github.com/microsoft/vscode-cpptools/issues/5049)
+
 ## Version 0.27.0-insiders: March 3, 2019
 ### Enhancements
 * Improved multi-root implementation with a single language server process and database for the entire workspace (shared between workspace folders). Fixes most [multi-root bugs](https://github.com/microsoft/vscode-cpptools/issues?q=is%3Aopen+is%3Aissue+label%3A%22Feature%3A+Multiroot%22+label%3A%22fixed+%28release+pending%29%22+milestone%3A0.27.0).

Extension/src/LanguageServer/client.ts

@@ -1022,9 +1022,11 @@ export class DefaultClient implements Client {
 
             settings.push(workspaceSettings);
             otherSettings.push(workspaceOtherSettings);
-            for (let workspaceFolder of vscode.workspace.workspaceFolders) {
-                settings.push(new CppSettings(workspaceFolder.uri));
-                otherSettings.push(new OtherSettings(workspaceFolder.uri));
+            if (vscode.workspace.workspaceFolders) {
+                for (let workspaceFolder of vscode.workspace.workspaceFolders) {
+                    settings.push(new CppSettings(workspaceFolder.uri));
+                    otherSettings.push(new OtherSettings(workspaceFolder.uri));
+                }
             }
 
             for (let setting of settings) {