segfault with v3.1.0 and possibly --harmony-arrow-functions

[freak4pc]

When trying to run the following
iojs --harmony-arrow-functions dreamdate.js

This issue isn't happening in io.js v2.5.0 , and also doesn't happen on io.js v3.0.
Starts from v3.1.0.

[mscdex]

Can you produce a minimal, reproducible example? What platform is this on?

I just tried a simple script (with --harmony-arrow-functions) that used fat arrows on v3.1.0 on Linux and did not encounter this issue.

[freak4pc]

It seems to work fine here as well with a smaller sample,
So I guess it's not directly related to --harmony-arrow-functions

The following script works fine on 3.2.0 :

'use strict'

let callback = (name) => {
        console.log("hello " + name)
}

callback("shai")

But specifically when running my server (which works fine on 2.5.0 as well as 3.0.0) , it crashes with a Segfault.

Is there any way to get more verbose output so I can give a better direction for this?

Thank you

[silverwind]

What OS is that? Try running it through either gdb or lldb, for example lldb -- iojs file.js and then r and probably bt.

[ChALkeR]

See #1655 just in case.

[yoshuawuyts]

Not sure if related, but found an issue where 0.12.x gives an ECONNREFUSED error, 3.2.0 segfaults. Can create a separate issue if not related.

img

txt

~/src/dlivr/api master
❯ npm start

> [email protected] start /Users/yw/src/dlivr/api
> node .

zsh: segmentation fault  npm start

~/src/dlivr/api master
❯ node -v
v3.2.0

~/src/dlivr/api master
❯ nvm use 0.12
^[kkNow using node v0.12.7 (npm v2.11.3)

~/src/dlivr/api master
❯ npm start

> [email protected] start /Users/yw/src/dlivr/api
> node .

{"name":"log","type":"static","message":"debug"}
{"name":"port","message":1337,"type":"static"}
{"name":"env","message":"development","type":"static"}
Knex:Error Pool2 - Error: connect ECONNREFUSED
Knex:Error Pool2 - Error: connect ECONNREFUSED
^C

~/src/dlivr/api master  2m 20s
❯ nvm use 3
Now using io.js v3.2.0 (npm v2.13.3)

[Fishrock123]

@yoshuawuyts can you open a new issue?

Also, can both of you use either lldb or gdb, or mdb to get a thorough breakdown of what is happening in the segfault? Feel free to ask if you need more info, setting this stuff up isn't particularly trivial.

[yoshuawuyts]

@Fishrock123 I'm willing to run that, but could you point me in the right direction on how to set that up? Thanks!

[Fishrock123]

Been a while since I did it. @thlorenz has a guide here for lldb on OS X: https://gist.github.com/thlorenz/30bf0a3f67b1d97b2945 (Not sure if it is up-to-date, when I did it I didn't patch lldb and it worked?)

[Fishrock123]

@freak4pc Could you let us know what OS you're seeing this on at least? :)

[freak4pc]

Sorry guys, I'm pretty much flooded with work now.
I'll try to get more info from lldb tomorrow and post it here...

[evanlucas]

is this still an issue in the latest stable (v4.2.1 as of now)?

[evanlucas]

Closing due to inactivity and the fact that arrow functions are no longer behind a flag as of v4. If this is still an issue please feel to reopen. Thanks!