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From: Jan Beich <jbeich@tormail.org>
To: Craig Rodrigues <rodrigc@FreeBSD.org>
Subject: Re: firefox 19.0,1 crashing under FreeBSD 7
Date: Wed, 13 Mar 2013 23:51:42 +0000
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Craig Rodrigues <rodrigc@FreeBSD.org> writes:

> [xcb] Unknown request in queue while dequeuing
> [xcb] Most likely this is a multi-threaded client and XInitThreads has not
> been called
> [xcb] Aborting, sorry about that.
> Assertion failed: (!xcb_xlib_unknown_req_in_deq), function
> dequeue_pending_request, file xcb_io.c, line 178.
> Multiple segmentation faults occurred; can't display error dialog

Do you have cairo built with --enable-xlib-xcb or MOZ_USE_OMTC set in
the environment? Can you confirm on 7.4-RELEASE ?