Ask questionsAssertion `(parser->current_buffer_len_) == (0)' failed

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  • Version: v8.1.4
  • Platform: Linux 4.9.0-2-amd64 #1 SMP Debian 4.9.18-1 (2017-03-30) x86_64 GNU/Linux
  • Subsystem:


I get the following crash from time to time (randomly, it seems):

/usr/local/bin/node[26969]: ../src/ void node::{anonymous}::Parser::Execute(const v8::FunctionCallbackInfo<v8::Value>&): Assertion `(parser->current_buffer_len_) == (0)' failed.
Main process exited, code=killed, status=6/ABRT
 1: node::Abort() [/usr/local/bin/node]
 2: node::Assert(char const* const (*) [4]) [/usr/local/bin/node]
 3: 0x14135d1 [/usr/local/bin/node]
 4: 0xcc6de636c65

I'm not entirely sure where this comes from as there is no JS stack trace, but I believe it happens when processing the response of a HTTP request. This bug has been around for a long time, but it's very inconsistent. It might have already been reported here, at least it seems to be related.


Answer questions himanshu-singh1995

I got the following error in node v10.16.0 while uploading a 1GB file on S3 using putObject method provided by the aws-sdk. By the uploading a file size of 1GB to S3 using putObject of aws-sdk, I was able to reproduce this error every time.

Note: Upload string(not Buffer) to S3.

node[10695]: ../src/ void node::{anonymous}::Parser::Finish(const v8::FunctionCallbackInfo<v8::Value>&): Assertion `parser->current_buffer_.IsEmpty()' failed.
 1: 0x8f9d10 node::Abort() [node]
 2: 0x8f9de5  [node]
 3: 0x9638b2  [node]
 4: 0xb8dfef  [node]
 5: 0xb8eb59 v8::internal::Builtin_HandleApiCall(int, v8::internal::Object**, v8::internal::Isolate*) [node]
 6: 0x154a4c55be1d 
Aborted (core dumped)

Code to reproduce this error

const fs = require('fs');
const AWS = require('aws-sdk');
AWS.config.update(/* creds */);

let data = null
fs.readFile('filename','utf8', (err, _data) => data = _data)  // this file should be >= 1GB
const params = {
      ACL: 'public-read',
      Body: data,
      Bucket: '<bucket>',
      Key: '<key>',
      ContentType: 'text/plain',
const s3 = new AWS.S3({ apiVersion: '2006-03-01' });
s3.putObject(params).promise().then(console.log, console.log);

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