==708== Invalid read of size 8
==708==    at 0xBCA4400: sna_dri2_add_event (sna_dri2.c:1453)
==708==    by 0xBCA6034: sna_dri2_schedule_flip (sna_dri2.c:2543)
==708==    by 0xBCA6ADE: sna_dri2_schedule_swap (sna_dri2.c:2884)
==708==    by 0x5645E7: DRI2SwapBuffers (dri2.c:1160)
==708==    by 0x565E5B: ProcDRI2Dispatch (dri2ext.c:413)
==708==    by 0x4375C6: Dispatch (dispatch.c:432)
==708==    by 0x43B755: dix_main (main.c:296)
==708==    by 0x66DDFFF: (below main) (in /usr/lib/libc-2.19.so)
==708==  Address 0xe0eacb0 is 80 bytes inside a block of size 128 free'd
==708==    at 0x4C2999C: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==708==    by 0xBCA412E: sna_dri2_event_free (sna_dri2.c:1362)
==708==    by 0xBCA5C38: sna_dri2_flip_event (sna_dri2.c:2392)
==708==    by 0xBCA453D: sna_dri2_flip_handler (sna_dri2.c:1506)
==708==    by 0xBBFDB59: sna_mode_wakeup (sna_display.c:6837)
==708==    by 0xBC00784: sna_wakeup_handler (sna_driver.c:772)
==708==    by 0x43C2D9: WakeupHandler (dixutils.c:426)
==708==    by 0x590C86: WaitForSomething (WaitFor.c:229)
==708==    by 0x4373E0: Dispatch (dispatch.c:361)
==708==    by 0x43B755: dix_main (main.c:296)
==708==    by 0x66DDFFF: (below main) (in /usr/lib/libc-2.19.so)
==708==
==708== Invalid read of size 8
==708==    at 0xBCA43F4: sna_dri2_add_event (sna_dri2.c:1454)
==708==    by 0xBCA6034: sna_dri2_schedule_flip (sna_dri2.c:2543)
==708==    by 0xBCA6ADE: sna_dri2_schedule_swap (sna_dri2.c:2884)
==708==    by 0x5645E7: DRI2SwapBuffers (dri2.c:1160)
==708==    by 0x565E5B: ProcDRI2Dispatch (dri2ext.c:413)
==708==    by 0x4375C6: Dispatch (dispatch.c:432)
==708==    by 0x43B755: dix_main (main.c:296)
==708==    by 0x66DDFFF: (below main) (in /usr/lib/libc-2.19.so)
==708==  Address 0xe0eacb0 is 80 bytes inside a block of size 128 free'd
==708==    at 0x4C2999C: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==708==    by 0xBCA412E: sna_dri2_event_free (sna_dri2.c:1362)
==708==    by 0xBCA5C38: sna_dri2_flip_event (sna_dri2.c:2392)
==708==    by 0xBCA453D: sna_dri2_flip_handler (sna_dri2.c:1506)
==708==    by 0xBBFDB59: sna_mode_wakeup (sna_display.c:6837)
==708==    by 0xBC00784: sna_wakeup_handler (sna_driver.c:772)
==708==    by 0x43C2D9: WakeupHandler (dixutils.c:426)
==708==    by 0x590C86: WaitForSomething (WaitFor.c:229)
==708==    by 0x4373E0: Dispatch (dispatch.c:361)
==708==    by 0x43B755: dix_main (main.c:296)
==708==    by 0x66DDFFF: (below main) (in /usr/lib/libc-2.19.so)
==708==
==708==
==708== Process terminating with default action of signal 11 (SIGSEGV): dumping core
==708==  Access not within mapped region at address 0x4F
==708==    at 0xBCA4400: sna_dri2_add_event (sna_dri2.c:1453)
==708==    by 0xBCA6034: sna_dri2_schedule_flip (sna_dri2.c:2543)
==708==    by 0xBCA6ADE: sna_dri2_schedule_swap (sna_dri2.c:2884)
==708==    by 0x5645E7: DRI2SwapBuffers (dri2.c:1160)
==708==    by 0x565E5B: ProcDRI2Dispatch (dri2ext.c:413)
==708==    by 0x4375C6: Dispatch (dispatch.c:432)
==708==    by 0x43B755: dix_main (main.c:296)
==708==    by 0x66DDFFF: (below main) (in /usr/lib/libc-2.19.so)
==708==  If you believe this happened as a result of a stack
==708==  overflow in your program's main thread (unlikely but
==708==  possible), you can try to increase the size of the
==708==  main thread stack using the --main-stacksize= flag.
==708==  The main thread stack size used in this run was 8388608.
==708==
==708== HEAP SUMMARY:
==708==     in use at exit: 7,608,460 bytes in 19,489 blocks
==708==   total heap usage: 158,270 allocs, 138,781 frees, 66,241,841 bytes allocated
==708==
==708== LEAK SUMMARY:
==708==    definitely lost: 1,406 bytes in 30 blocks
==708==    indirectly lost: 773 bytes in 6 blocks
==708==      possibly lost: 1,978,609 bytes in 4,796 blocks
==708==    still reachable: 5,627,672 bytes in 14,657 blocks
==708==         suppressed: 0 bytes in 0 blocks
==708== Rerun with --leak-check=full to see details of leaked memory
==708==
==708== For counts of detected and suppressed errors, rerun with: -v
==708== ERROR SUMMARY: 2984705 errors from 702 contexts (suppressed: 1 from 1)