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: 0 errors from 0 contexts (suppressed: 0 from 0) Unaddressable byte(s) found during client check request at 0x........: test2 (addressable.c:48) by 0x........: main (addressable.c:125) Address 0x........ is not stack'd, malloc'd or (recently) free'd Invalid write of size 1 at 0x........: test2 (addressable.c:51) by 0x........: main (addressable.c:125) Address 0x........ is not stack'd, malloc'd or (recently) free'd Process terminating with default action of signal N (SIGSEGV or SIGBUS) Bad memory (SIGSEGV or SIGBUS) at address 0x........ at 0x........: test2 (addressable.c:51) by 0x........: main (addressable.c:125) 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: 2 errors from 2 contexts (suppressed: 0 from 0) 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: 0 errors from 0 contexts (suppressed: 0 from 0) Process terminating with default action of signal N (SIGSEGV or SIGBUS) Bad memory (SIGSEGV or SIGBUS) at address 0x........ at 0x........: test4 (addressable.c:74) by 0x........: main (addressable.c:125) 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: 0 errors from 0 contexts (suppressed: 0 from 0) Uninitialised byte(s) found during client check request at 0x........: test5 (addressable.c:85) by 0x........: main (addressable.c:125) Address 0x........ is not stack'd, malloc'd or (recently) free'd Uninitialised byte(s) found during client check request at 0x........: test5 (addressable.c:91) by 0x........: main (addressable.c:125) Address 0x........ is not stack'd, malloc'd or (recently) free'd 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 Use --track-origins=yes to see where uninitialised values come from ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0) 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: 0 errors from 0 contexts (suppressed: 0 from 0)