log session creation failure and show a modal to users

Author: jrieken

src/vs/workbench/contrib/interactiveEditor/browser/interactiveEditorController.ts

@@ -183,6 +183,7 @@ export class InteractiveEditorController implements IEditorContribution {
 		delete options?.existingSession;
 
 		if (!session) {
+			this._dialogService.info(localize('create.fail', "Failed to start editor chat"), localize('create.fail.detail', "Please consult the error log and try again later."));
 			return State.DONE;
 		}
 

src/vs/workbench/contrib/interactiveEditor/browser/interactiveEditorSession.ts

@@ -282,7 +282,14 @@ export class InteractiveEditorSessionService implements IInteractiveEditorSessio
 
 		const textModel = editor.getModel();
 		const selection = editor.getSelection();
-		const raw = await provider.prepareInteractiveEditorSession(textModel, selection, token);
+		let raw: IInteractiveEditorSession | undefined | null;
+		try {
+			raw = await provider.prepareInteractiveEditorSession(textModel, selection, token);
+		} catch (error) {
+			this._logService.error('[IE] FAILED to prepare session', provider.debugName);
+			this._logService.error(error);
+			return undefined;
+		}
 		if (!raw) {
 			this._logService.trace('[IE] NO session', provider.debugName);
 			return undefined;