From: rgs@...
Date: 2012-08-24T13:04:20+09:00
Subject: Is calling system() from a thread suppose to be safe?

Hey there,

I am calling system() from a thread and getting:

`system': no implicit conversion from nil to integer (TypeError)
from wifi-state-observer:169:in `vpn_down'
from wifi-state-observer:46:in `block in run'
from wifi-state-observer:54:in `call'
from wifi-state-observer:54:in `run'
from wifi-state-observer:54:in `run'
from wifi-state-observer:270:in `<main>'

Looking at Ruby's source:

https://github.com/ruby/ruby/blob/trunk/process.c#L3673

it seems like rb_last_status_get() might be non-thread safe? Though I
would expect at that time the GVL would held so I am not sure why would
rb_last_status_get() return nil. This is running 1.9.3.

Any ideas?

- rgs