Bug #7801: Segfault with block called from continuation

• Status: Third Party's Issue
• Assignee: -
• Target version: -
• ruby -v: ruby 1.9.3p385 (2013-02-06 revision 39114) [x86_64-darwin11.4.2]

[chrismcg (Chris McGrath)]

I'm getting a crash on OSX with 1.9.3-p385. I've also had the same crash on all the releases since at least -p194. I've seen some similar crash reports but nothing quite the same. Unfortunately this only happens intermittently when running my rails test suite and I haven't been able to make a simple reproduction.

The code where the crash occurs is in a model that uses the state_machine gem, specifically an around_transition which uses continuations internally. It's calling a block so given the intermittent nature of the crash perhaps the block is being GC'd at some point?

Our code looks like:

around_transition do |item, block|
item.changing_state = true
block.call
item.changing_state = false
end

[ko1 (Koichi Sasada)]

• Category set to ext
• Status changed from Open to Third Party's Issue

Simply, do not use continuation.

It is difficult to make an extension library with continuation.