Can't do regex search after opening notebook (microsoft#183884)

Fixes microsoft#183858

Author: andreamah

src/vs/workbench/contrib/search/browser/searchFindInput.ts

@@ -67,20 +67,8 @@ export class SearchFindInput extends ContextScopedFindInput {
 			!this.filters.codeInput ||
 			!this.filters.codeOutput;
 
-		// for now, allow the default state to enable regex, since it would be strange for regex to suddenly
-		// be disabled when a notebook is opened. However, since regex isn't supported for outputs, this should
-		// be revisted.
-		if (this.regex) {
-			if ((this.filters.markupPreview || this.filters.codeOutput) && this._filterChecked && this._visible) {
-				this.regex.disable();
-				this.regex.domNode.tabIndex = -1;
-				this.regex.domNode.classList.toggle('disabled', true);
-			} else {
-				this.regex.enable();
-				this.regex.domNode.tabIndex = 0;
-				this.regex.domNode.classList.toggle('disabled', false);
-			}
-		}
+		// TODO: find a way to express that searching notebook output and markdown preview don't support regex.
+
 		this._findFilter.applyStyles(this._filterChecked);
 	}
 }

src/vs/workbench/contrib/search/browser/searchModel.ts

@@ -792,7 +792,11 @@ export class FileMatch extends Disposable implements IFileMatch {
 				webviewMatches: webviewMatches
 			};
 		});
-		this._findMatchDecorationModel.setAllFindMatchesDecorations(cellFindMatch);
+		try {
+			this._findMatchDecorationModel.setAllFindMatchesDecorations(cellFindMatch);
+		} catch (e) {
+			// no op, might happen due to bugs related to cell output regex search
+		}
 	}
 	async updateMatchesForEditorWidget(): Promise<void> {
 		if (!this._notebookEditorWidget) {