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Subject: [Bug sanitizer/59302] tsan: Unexpected mmap in InternalAllocator!
Date: Wed, 27 Nov 2013 07:13:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59302

--- Comment #1 from Kostya Serebryany <kcc at gcc dot gnu.org> ---
This isn't expected to happen and so we did not write a better warning message.
We may be able to fix it, but the underlying problem is in your tests: 
it has a race that tsan is trying to report and which is suppressed
(probably because a similar races was reported before).

How many race reports do you see before tsan crashes? 
Did you suppress any of those?