Fixes issues with stash command errors

src/commands/git/stash.ts

@@ -274,11 +274,15 @@ export class StashGitCommand extends QuickCommandBase {
 							)
 						) {
 							void window.showWarningMessage(
-								'Unable to apply stash. Your working tree changes would be overwritten'
+								'Unable to apply stash. Your working tree changes would be overwritten. Please commit or stash your changes before trying again'
 							);
 
 							return undefined;
-						} else if (ex.message.includes('Auto-merging') && ex.message.includes('CONFLICT')) {
+						} else if (
+							(ex.message.includes('Auto-merging') && ex.message.includes('CONFLICT')) ||
+							(ex.stdout?.includes('Auto-merging') && ex.stdout?.includes('CONFLICT')) ||
+							ex.stdout?.includes('needs merge')
+						) {
 							void window.showInformationMessage('Stash applied with conflicts');
 
 							return undefined;
@@ -445,7 +449,7 @@ export class StashGitCommand extends QuickCommandBase {
 				state.subcommand = selection[0].command;
 			}
 
-			void state.repo.stashApply(state.stash!.stashName, { deleteAfter: state.subcommand === 'pop' });
+			void (await state.repo.stashApply(state.stash!.stashName, { deleteAfter: state.subcommand === 'pop' }));
 
 			throw new BreakQuickCommand();
 		}
@@ -556,7 +560,7 @@ export class StashGitCommand extends QuickCommandBase {
 				break;
 			}
 
-			void state.repo.stashDelete(state.stash.stashName);
+			void (await state.repo.stashDelete(state.stash.stashName));
 
 			throw new BreakQuickCommand();
 		}
@@ -653,7 +657,7 @@ export class StashGitCommand extends QuickCommandBase {
 
 				const command = selection[0];
 				if (command instanceof CommandQuickPickItem) {
-					command.execute();
+					void (await command.execute());
 
 					throw new BreakQuickCommand();
 				}
@@ -743,10 +747,10 @@ export class StashGitCommand extends QuickCommandBase {
 				state.flags = selection[0].item;
 			}
 
-			void state.repo.stashSave(state.message, state.uris, {
+			void (await state.repo.stashSave(state.message, state.uris, {
 				includeUntracked: state.flags.includes('--include-untracked'),
 				keepIndex: state.flags.includes('--keep-index')
-			});
+			}));
 
 			throw new BreakQuickCommand();
 		}

src/system/decorators/gate.ts

@@ -45,15 +45,26 @@ export function gate any>(resolver?: (...args: Parame
 
 			let promise = this[prop];
 			if (promise === undefined) {
-				const result = fn!.apply(this, args);
-				if (result == null || !Promises.is(result)) {
-					return result;
-				}
+				let result;
+				try {
+					result = fn!.apply(this, args);
+					if (result == null || !Promises.is(result)) {
+						return result;
+					}
 
-				this[prop] = promise = result.then((r: any) => {
+					this[prop] = promise = result
+						.then((r: any) => {
+							this[prop] = undefined;
+							return r;
+						})
+						.catch(ex => {
+							this[prop] = undefined;
+							throw ex;
+						});
+				} catch (ex) {
 					this[prop] = undefined;
-					return r;
-				});
+					throw ex;
+				}
 			}
 
 			return promise;