hot exit - do not clean backups when quitting before editors have been restored

src/vs/workbench/services/textfile/common/textFileService.ts

@@ -15,7 +15,7 @@ import { IWindowsService, IWindowService } from 'vs/platform/windows/common/wind
 import { IBackupFileService } from 'vs/workbench/services/backup/common/backup';
 import { IResult, ITextFileOperationResult, ITextFileService, IRawTextContent, IAutoSaveConfiguration, AutoSaveMode, SaveReason, ITextFileEditorModelManager, ITextFileEditorModel, ModelState, ISaveOptions, AutoSaveContext, IWillMoveEvent } from 'vs/workbench/services/textfile/common/textfiles';
 import { ConfirmResult, IRevertOptions } from 'vs/workbench/common/editor';
-import { ILifecycleService, ShutdownReason } from 'vs/platform/lifecycle/common/lifecycle';
+import { ILifecycleService, ShutdownReason, LifecyclePhase } from 'vs/platform/lifecycle/common/lifecycle';
 import { IWorkspaceContextService, WorkbenchState } from 'vs/platform/workspace/common/workspace';
 import { IFileService, IResolveContentOptions, IFilesConfiguration, FileOperationError, FileOperationResult, AutoSaveConfiguration, HotExitConfiguration } from 'vs/platform/files/common/files';
 import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
@@ -287,6 +287,10 @@ export abstract class TextFileService extends Disposable implements ITextFileSer
 			return false;
 		}
 
+		if (this.lifecycleService.phase < LifecyclePhase.Restored) {
+			return false; // if editors have not restored, we are not up to speed with backups and thus should not clean them
+		}
+
 		return this.cleanupBackupsBeforeShutdown().then(() => false, () => false);
 	}