#355 gm: realloc(): invalid next size: 0xb7c4bab0 ***

[Denis M.]

The attached SVG causes GM to crach (I have tried identify and convert).
It drops a message " glibc detected *** gm: realloc(): invalid next size: 0xb7c4bab0 " and hangs.
Please fix this.

[Bob Friesenhahn]

You did not report which version of GraphicsMagick you are using. I am not able to reproduce the problem in the current GraphicsMagick release.

[Denis M.]

Thank you Bob for getting back so quickly. I am sorry, I should have checked before complaining. We are using version 1.3.12 and should update first.

[Bob Friesenhahn]

Both ASAN and valgrind are not finding a problem when reading this file with the current GraphicsMagick release:

% valgrind --tool=memcheck --leak-check=full ~/build/GM-16-static-debug/utilities/gm display bug-355/fail.svg
==1655== Memcheck, a memory error detector
==1655== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==1655== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
==1655== Command: /home/bfriesen/build/GM-16-static-debug/utilities/gm display bug-355/fail.svg
==1655==
==1655==
==1655== HEAP SUMMARY:
==1655==     in use at exit: 64,811 bytes in 839 blocks
==1655==   total heap usage: 13,037 allocs, 12,198 frees, 23,894,357 bytes allocated
==1655==
==1655== LEAK SUMMARY:
==1655==    definitely lost: 0 bytes in 0 blocks
==1655==    indirectly lost: 0 bytes in 0 blocks
==1655==      possibly lost: 0 bytes in 0 blocks
==1655==    still reachable: 64,811 bytes in 839 blocks
==1655==         suppressed: 0 bytes in 0 blocks
==1655== Reachable blocks (those to which a pointer was found) are not shown.
==1655== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==1655==
==1655== For counts of detected and suppressed errors, rerun with: -v
==1655== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 8 from 1)

Bob