No stack.
No stack.
#0  0xb77c2424 in __kernel_vsyscall ()
#1  0x4ecd7172 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0x4ecd893c in *__GI_abort () at abort.c:92
#3  0x0809717a in dump_core () at utils.c:1053
#4  0x08098186 in internal_vproblem (problem=0x842da24, file=<optimized out>, line=<optimized out>, fmt=0x8332098 "%s: Assertion `%s' failed.", 
    ap=0xbfe5f124 "\374\336\063\b$\324\063\bh\021\065\006") at utils.c:1221
#5  0x08098403 in internal_verror (file=0x833d407 "linux-thread-db.c", line=1062, fmt=0x8332098 "%s: Assertion `%s' failed.", 
    ap=0xbfe5f124 "\374\336\063\b$\324\063\bh\021\065\006") at utils.c:1236
#6  0x08098436 in internal_error (file=0x833d407 "linux-thread-db.c", line=1062, string=0x8332098 "%s: Assertion `%s' failed.") at utils.c:1246
#7  0x080dbf46 in attach_thread (ptid=..., th_p=0xbfe5f3c4, ti_p=0xbfe5f20c) at linux-thread-db.c:1062
#8  0x080dc09b in find_new_threads_callback (th_p=0xbfe5f3c4, data=0xbfe5f478) at linux-thread-db.c:1373
#9  0xb7041ed2 in iterate_thread_list (ta=0x9e16800, callback=0x80dbf50 <find_new_threads_callback>, cbdata_p=0xbfe5f478, state=TD_THR_ANY_STATE, ti_pri=-20, 
    head=0x6353180, fake_empty=true, match_pid=28135) at td_ta_thr_iter.c:51
#10 0xb704209b in td_ta_thr_iter (ta_arg=0x9e16800, callback=0x80dbf50 <find_new_threads_callback>, cbdata_p=0xbfe5f478, state=TD_THR_ANY_STATE, ti_pri=-20, 
    ti_sigmask_p=0x0, ti_user_flags=4294967295) at td_ta_thr_iter.c:161
#11 0x080db60a in find_new_threads_once (info=0x9d5c568, iteration=0, errp=0x0) at linux-thread-db.c:1405
#12 0x080db957 in thread_db_find_new_threads_2 (ptid=..., until_no_new=1) at linux-thread-db.c:1468
#13 0x080dbb07 in thread_db_find_new_threads_silently (ptid=...) at linux-thread-db.c:618
#14 0x080dd6e7 in try_thread_db_load_1 (info=<optimized out>) at linux-thread-db.c:755
#15 try_thread_db_load (library=<optimized out>) at linux-thread-db.c:797
#16 0x080dda6b in thread_db_load_search () at linux-thread-db.c:862
#17 thread_db_load () at linux-thread-db.c:889
#18 0x08091797 in generic_observer_notify (args=0xbfe605dc, subject=<optimized out>) at observer.c:168
#19 observer_notify_new_objfile (objfile=0x9ecaf50) at observer.inc:292
#20 0x08197d11 in symbol_file_add_with_addrs_or_offsets (abfd=<optimized out>, add_flags=8, addrs=0x9e1a630, flags=3, num_offsets=0, offsets=0x0) at symfile.c:1174
#21 0x08197f87 in symbol_file_add_separate (bfd=0x9e884e0, symfile_flags=8, objfile=0x9e59e58) at symfile.c:1195
#22 0x08140187 in elf_symfile_read (objfile=0x9e59e58, symfile_flags=8) at elfread.c:1408
#23 0x081979b7 in syms_from_objfile (objfile=0x9e59e58, addrs=<optimized out>, offsets=0x0, num_offsets=0, add_flags=8) at symfile.c:1020
#24 0x08197cb2 in symbol_file_add_with_addrs_or_offsets (abfd=<optimized out>, add_flags=8, addrs=0x9daf230, flags=2, num_offsets=0, offsets=0x0) at symfile.c:1123
#25 0x080a6148 in solib_read_symbols (so=0x9d69590, flags=8) at solib.c:650
#26 0x080a667f in solib_add (pattern=0x0, from_tty=0, target=0x84372c0, readsyms=1) at solib.c:956
#27 0x081a1e54 in post_create_inferior (target=0x84372c0, from_tty=1) at infcmd.c:445
#28 0x080d2185 in core_open (filename=<optimized out>, from_tty=1) at corelow.c:425
#29 0x081badda in catch_command_errors (command=0x8093d70 <core_file_command>, arg=0xbfe628e5 "/mnt/loop/core", from_tty=1, mask=6) at exceptions.c:537
#30 0x0808c47e in captured_main (data=0xbfe60a70) at ./main.c:862
#31 0x081bad4d in catch_errors (func=0x808bf50 <captured_main>, func_args=0xbfe60a70, errstring=0x8340810 "", mask=6) at exceptions.c:521
#32 0x0808d082 in gdb_main (args=0xbfe60a70) at ./main.c:945
#33 0x0808bd03 in main (argc=3, argv=0xbfe60b24) at gdb.c:35