From: Brian Candler <b.candler@...>
Date: 2008-11-07T06:14:43+09:00
Subject: Re: Garbage collector segmentation fault

Henrik Zagerholm wrote:
> I get this every now and then when running some ruby / c++ methods from
> within rails.

What do you mean by "ruby / c++ methods"? Have you written your own 
extension to Ruby, or used someone elses?

What does $LOADED_FEATURES.grep(/\.so/) show?

> It looks like ruby's garbage collector once again makes bad decisions...
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 47432141183712 (LWP 30617)]
> garbage_collect () at gc.c:1184
> 1184        if (!(p->as.basic.flags & FL_MARK)) {

Or it could be bad setup of data structures from some extension library, 
or incorrect handling of mark/sweep by that library, causing objects 
which are still live to be garbage collected.

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