Thread 8 and Thread 1 are doing basically the same thing, which may be the reason for this crash.

Philip Withnall suggested in that bug:

   I’d say it’s an EDS bug. libgdata requires that the implementations of
   GDataAuthorizer->process_request() are thread-safe. EDS’ implementation is
   thread-safe, but not safe if process_request() is called on two *different*
   EGDataGoaAuthorizer instances simultaneously.

   I guess EDS should put a static global mutex around calls to oauth_gen_nonce().
   It could probably replace the call to oauth_sign_hmac_sha1() with GHmac, which
   would save some locking.

   Either that, or make oauth_init_nss() in liboauth be thread-safe.

Created attachment 212270 [details] [review]
eds patch

for evolution-data-server;

I realized that the eds' EGDataGoaAuthorizer object had a mutex for thread-safety already, it was only thread-safe per object, not in global. I made it a global mutex, which should fix the issue.

Created commit 6c96980 in eds master (3.5.1+)
Created commit 7b6f8bd in eds gnome-3-4 (3.4.2+)