creator经常会锁死，之前发过类似的帖子。今天出现的时候，有打印错误。
Error: EPERM: operation not permitted, open ‘C:\work\ppbclient\temp\BackupAssets\assets\scene\main.fire’
at Error (native)
at Object.fs.openSync (fs.js:640:18)
at Object.module.(anonymous function) [as openSync] (ELECTRON_ASAR.js:191:20)
at copyFileSync (C:\CocosCreator\resources\app.asar\node_modules\fs-extra\lib\copy-sync\copy-file-sync.js:21:16)
at Object.copySync (C:\CocosCreator\resources\app.asar\node_modules\fs-extra\lib\copy-sync\copy-sync.js:32:7)
at _backupAsset (C:\CocosCreator\resources\app.asar\asset-db\lib\tasks.js:1:1870)
at Async.waterfall.s (C:\CocosCreator\resources\app.asar\asset-db\lib\tasks.js:1:21030)
at fn (C:\CocosCreator\resources\app.asar\node_modules\async\lib\async.js:746:34)
at C:\CocosCreator\resources\app.asar\node_modules\async\lib\async.js:1213:16
at C:\CocosCreator\resources\app.asar\node_modules\async\lib\async.js:166:37
at process.on.t (C:\CocosCreator\resources\app.asar\editor\core\editor-init.js:1:992)
at emitOne (events.js:101:20)
at process.emit (events.js:188:7)
at process._fatalException (bootstrap_node.js:304:26)
出现后，creator可以正常操作，无法保存。点X也关闭不了