Jump to the invalid address stated on the next line ... Address 0x........ is not stack'd, malloc'd or (recently) free'd Process terminating with default action of signal 11 (SIGSEGV) Access not within mapped region at address 0x........ ... If you believe this happened as a result of a stack overflow in your program's main thread (unlikely but possible), you can try to increase the size of the main thread stack using the --main-stacksize= flag. The main thread stack size used in this run was .... HEAP SUMMARY: in use at exit: ... bytes in ... blocks total heap usage: ... allocs, ... frees, ... bytes allocated For a detailed leak analysis, rerun with: --leak-check=full For counts of detected and suppressed errors, rerun with: -v ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)