Is this my bug or a bug/assertion fail in malloc itself?
alloc.c:2451: sYSMALLOc: Assertion `(old_top == (((mbinptr) (((char *)
&((av)->bins[((1) – 1) * 2])) – __builtin_offsetof (struct
malloc_chunk, fd)))) && old_size == 0) || ((unsigned long) (old_size)= (unsigned long)((((__builtin_offsetof (struct malloc_chunk, fd_nextsize))+((2 * (sizeof(size_t))) – 1)) & ~((2 * (sizeof(size_t)))
– 1))) && ((old_top)->size & 0x1) && ((unsigned long)old_end & pagemask) == 0)’ failed.
- libstdc++6:amd64 4.7.2-2ubuntu1
- gcc 4.7.2
- ubuntu 12.10/64bit
The most likely explanation is that there’s a memory bug in your program (writing to freed memory, buffer overrun, etc). An outright bug in
malloc()is far less likely.