Comment 6 for bug 891970

Fails in:
|111 TRY_CATCH (ex, RETURN_MASK_ERROR)
|112 {
>|113 res = entry->unwinder->sniffer (entry->unwinder, this_frame,
|114 this_cache);
|115 }

(gdb) p *entry->unwinder
$7 = {type = NORMAL_FRAME, stop_reason = 0x806baeb <msp430_epilogue_frame_this_id>, this_id = 0x806c7db <msp430_frame_prev_register>, prev_register = 0, unwind_data = 0x806c814, sniffer = 0, dealloc_cache = 0,
  prev_arch = 0}

sniffer is NULL, but what is it and where is it coming from?