Fixes microsoft#99167: Do not check for unusual line terminators when undoing

alexdima · alexdima · commit a96098e2bfe8 · 2020-06-04T22:12:26.000+02:00
diff --git a/src/vs/editor/contrib/unusualLineTerminators/unusualLineTerminators.ts b/src/vs/editor/contrib/unusualLineTerminators/unusualLineTerminators.ts
@@ -48,7 +48,11 @@ class UnusualLineTerminatorsDetector extends Disposable implements IEditorContri
 			this._checkForUnusualLineTerminators();
 		}));
 
-		this._register(this._editor.onDidChangeModelContent(() => {
+		this._register(this._editor.onDidChangeModelContent((e) => {
+			if (e.isUndoing) {
+				// skip checking in case of undoing
+				return;
+			}
 			this._checkForUnusualLineTerminators();
 		}));
 	}
