[Bug bootstrap/53779] Bootstrap hangs waiting for a lock

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53779

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2012-06-26 15:58:40 
UTC ---
(In reply to comment #3)
> I wonder if the recent changes to var-tracking.c contain the possibility for a
> double-free.
> 

PR 53706.