提交表单时发生 parser error

有谁碰到过这个错误

Error: parser error, 40 of 44 bytes parsed at IncomingForm.write (F:\goweixin\node_modules\express\node_modules\connect\node_modules\formidable\lib\incoming_form.js:145:17) at IncomingMessage. (F:\goweixin\node_modules\express\node_modules\connect\node_modules\formidable\lib\incoming_form.js:95:12) at IncomingMessage.EventEmitter.emit (events.js:88:17) at IncomingMessage._emitData (http.js:359:10) at HTTPParser.parserOnBody [as onBody] (http.js:123:21) at Socket.socket.ondata (http.js:1690:22) at TCP.onread (net.js:402:27)