seg fault

Hi, all.

I'm trying to push another app to Heroku & `bundle install` is telling
me there's a bug:

`/Users/dobbin/.rvm/gems/ruby-1.9.3-p0/gems/json-1.6.5/ext/json/ext/json/ext/parser.bundle:
[BUG] Segmentation fault
ruby 1.8.7 (2011-12-28 patchlevel 357) [i686-darwin10]`

That is the tail of the error message; I've a full crash report (I'm
using OS X 10.6.8 in this particular instance) & I've tried to register
at the relevant Ruby site for bugs but their mail bot must be having a
day off.

I've drawn a blank on Google also. Has anybody else seen this? As you
can see, I'm using the latest stable rvm, Ruby 1.9.3-p0 & rails 3.2.1.

Any help appreciated.

Cheers,

  Phil...

- --
But masters, remember that I am an ass.
Though it be not written down,
yet forget not that I am an ass.

  Wm. Shakespeare - Much Ado About Nothing