From: "kosaki (Motohiro KOSAKI)" <kosaki.motohiro@...>
Date: 2013-03-13T11:39:48+09:00
Subject: [ruby-core:53360] [ruby-trunk - Bug #8080][Assigned] Segfault in rb_fd_set


Issue #8080 has been updated by kosaki (Motohiro KOSAKI).

Category set to core
Status changed from Open to Assigned
Assignee set to kosaki (Motohiro KOSAKI)
Target version set to current: 2.1.0


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Bug #8080: Segfault in rb_fd_set
https://bugs.ruby-lang.org/issues/8080#change-37557

Author: jonleighton (Jon Leighton)
Status: Assigned
Priority: Normal
Assignee: kosaki (Motohiro KOSAKI)
Category: core
Target version: current: 2.1.0
ruby -v: ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-linux]


I have experienced a segfault with Ruby 2 during an IO.select call:

See https://travis-ci.org/jonleighton/spring/jobs/5393025 or https://gist.github.com/jonleighton/5147785 to see the crash output.

I cannot reproduce on a different version of Linux (Fedora). However I was able to reproduce by downloading a VM image of the Travis CI environment and running the code on there (see http://pivotallabs.com/debugging-travis-builds/ for how to do that).

I tried to produce a simple script to reproduce, but without success. I also tried to build Ruby 2 with debugging symbols, but this did not produce the crash. I'm not sure why - perhaps related to compiler optimisations.

I found a workaround for the crash with https://github.com/jonleighton/spring/commit/c8a7afdd3238ef88bffc2c8f56baa21042400e15.


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