Comment 2 for bug 1507760

StacktraceTop:
 __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7f4464e941a8 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
 malloc_printerr (ptr=<optimized out>, str=0x7f4464e94300 "free(): invalid next size (normal)", action=1) at malloc.c:4965
 _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3834
 __GI___libc_free (mem=<optimized out>) at malloc.c:2950
 operator delete (ptr=<optimized out>) at ../../../../src/libstdc++-v3/libsupc++/del_op.cc:46