Crash on quit/_restart

After the latest TF2 update our servers (and some other peoples servers http://ift.tt/1BbnAQd ) are getting crashes when issuing the quit or _restart command.

Code:

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/home/buildbot/buildslave/steam_rel_client_linux/build/src/tier1/../tier1/fileio.
cpp (3997) : Assertion Failed: CFileWriterThread: pending file writer content_log
.txt
Assert( Assertion Failed: CFileWriterThread: pending file writer content_log.txt
):/home/buildbot/buildslave/steam_rel_client_linux/build/src/tier1/../tier1/filei
o.cpp:3997

assert_20150614122526_15.dmp[10128]: Uploading dump (out-of-process)
/tmp/dumps/assert_20150614122526_15.dmp
Bad thread local/home/buildbot/buildslave/steam_rel_client_linux/build/src/tier0/
threadtools.cpp (1416) : Assertion Failed: Thread synchronization object is unuse
able
Bad thread local

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Crash on quit/_restart