Comment 2 for bug 1726791

StacktraceTop:
 __libc_message (action=(do_abort | do_backtrace), fmt=<optimized out>) at ../sysdeps/posix/libc_fatal.c:181
 malloc_printerr (action=<optimized out>, str=0xb74993af "free(): invalid pointer", ptr=<optimized out>, ar_ptr=0xb74f17a0 <main_arena>) at malloc.c:5425
 _int_free (av=0xb74f17a0 <main_arena>, p=<optimized out>, have_lock=have_lock@entry=0) at malloc.c:4174
 __GI___libc_free (mem=0xaf63c80) at malloc.c:3144
 operator delete (ptr=0xaf63c80) at ../../../../src/libstdc++-v3/libsupc++/del_op.cc:49