fix #54052

src/vs/platform/history/electron-main/historyMainService.ts

@@ -62,6 +62,7 @@ export class HistoryMainService implements IHistoryMainService {
 			const mru = this.getRecentlyOpened();
 
 			// Workspaces
+			if (Array.isArray(workspaces)) {
 				workspaces.forEach(workspace => {
 					const isUntitledWorkspace = !isSingleFolderWorkspaceIdentifier(workspace) && this.workspacesMainService.isUntitledWorkspace(workspace);
 					if (isUntitledWorkspace) {
@@ -74,8 +75,10 @@ export class HistoryMainService implements IHistoryMainService {
 					// We do not add to recent documents here because on Windows we do this from a custom
 					// JumpList and on macOS we fill the recent documents in one go from all our data later.
 				});
+			}
 
 			// Files
+			if (Array.isArray(files)) {
 				files.forEach((path) => {
 					mru.files.unshift(path);
 					mru.files = arrays.distinct(mru.files, file => this.distinctFn(file));
@@ -85,6 +88,7 @@ export class HistoryMainService implements IHistoryMainService {
 						app.addRecentDocument(path);
 					}
 				});
+			}
 
 			// Make sure its bounded
 			mru.workspaces = mru.workspaces.slice(0, HistoryMainService.MAX_TOTAL_RECENT_ENTRIES);