Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

CreateListFromArrayLike called on non-object

See original GitHub issue

You want to:

report a bug
request a feature

Current behaviour

Server dies instantly, cause unknown

Steps to reproduce (if the current behaviour is a bug)

This happened passively, I found this in my error log

/home/ubuntu/node_modules/socket.io/lib/socket.js:503
      emit.apply(self, event);
           ^

TypeError: CreateListFromArrayLike called on non-object
    at /home/ubuntu/node_modules/socket.io/lib/socket.js:503:12
    at _combinedTickCallback (internal/process/next_tick.js:73:7)
    at process._tickCallback (internal/process/next_tick.js:104:9)

Expected behaviour

Handle the issue, provide more information

Setup

OS: Ubuntu
browser: Node 7.7.1
socket.io version: 1.7.3

Other information (e.g. stacktraces, related issues, suggestions how to fix)

Issue Analytics

State:
Created 6 years ago
Comments:6 (1 by maintainers)

Top GitHub Comments

3reactions

jamesbachinicommented, Dec 20, 2017

I had this issue on a fairly high load server. Was getting a lot of uncaught exceptions. The way I fixed it was to add this line to /node_modules/socket.io/lib/socket.js

if (typeof event !== ‘object’) return false;

Above line 513, emit.apply(self, event);

This seems to have fixed the issue for now but not sure if it’s a good permanent solution.

1reaction

hengwooncommented, Dec 18, 2017

I have been seeing a bunch of these errors as well