Haven't see this one before. I think there's some stack corruption going on. I had a single frame up and was typing some keys (sorry, don't remember what because it took a while for xemacs to produce a core file and I thought it was swapping). I did have ilisp and a cmulisp and gdb process going at the time. Anyway, the C traceback is appended. The lisp backtrace is in kernel memory somewhere waiting to be flushed out... Ray #0 0xfeb96870 in ?? () #1 0xfeb95990 in ?? () #2 0xfeb392a4 in ?? () #3 0xa775c in Fdump_emacs (intoname=3053572, symname=3053572) at emacs.c:2842 #4 0x692f0 in make_lcrecord_list (size=0, implementation=0x0) at alloc.c:2259 #5 0x6ae14 in garbage_collect_1 () at alloc.c:3335 #6 0xae704 in Feval (form=3053572) at eval.c:3009 #7 0x796c4 in execute_optimized_program (program=0xffbed244 "", stack_depth=2, constants_data=0x97cb90) at bytecode.c:649 #8 0x78f20 in bytecode_arithop (obj1=2842624, obj2=3053572, opcode=4290696348) at bytecode.c:403 #9 0xaeab0 in Feval (form=-4271096) at eval.c:3083 #10 0x796c4 in execute_optimized_program (program=0xffbed494 "", stack_depth=1, constants_data=0x97cb10) at bytecode.c:649 #11 0x78f20 in bytecode_arithop (obj1=3838796, obj2=3838796, opcode=4290696936) at bytecode.c:403 #12 0xaeab0 in Feval (form=3053596) at eval.c:3083 #13 0xafb4c in run_hook_with_args_in_buffer (buf=0x6159cc, nargs=3055108, args=0xd749c4, cond=2868224) at eval.c:3646 #14 0x6d194 in print_buffer (obj=14109124, printcharfun=3053596, escapeflag=2895872) at buffer.c:266 #15 0x6d81c in push_buffer_alist (name=14109124, buf=14109124) at buffer.c:507 #16 0xbc858 in Ftest_data_format_conversion () at tests.c:406 #17 0x165ec0 in Fmove_to_column (column=11746816, force=27569, buffer=2549760) at indent.c:473 #18 0x1661c4 in vmotion_1 (w=0x2bc400, orig=27569, vtarget=-4269296, ret_vpos=0x2e9804, ret_vpix=0x0) at indent.c:663 #19 0x166e3c in charcount_to_bytecount (ptr=0xb33e00 "\030\2230", len=-1) at insdel.c:389 #20 0x89a74 in internal_self_insert (c1=10, noautofill=0) at buffer.h:647 #21 0x893a0 in Fbeginning_of_line (n=0, buffer=0) at cmds.c:165 #22 0xae8d0 in Feval (form=21) at lisp.h:591 #23 0x796c4 in execute_optimized_program (program=0xffbedd1c "", stack_depth=1, constants_data=0x3ea410) at bytecode.c:649 #24 0x78f20 in bytecode_arithop (obj1=2842624, obj2=3053572, opcode=4290699136) at bytecode.c:403 #25 0xaeab0 in Feval (form=2816000) at eval.c:3083 #26 0x796c4 in execute_optimized_program (program=0xffbedf7c "", stack_depth=0, constants_data=0x43e3f0) at bytecode.c:649 #27 0x78f20 in bytecode_arithop (obj1=2842624, obj2=3053572, opcode=4290699728) at bytecode.c:403 #28 0xaeab0 in Feval (form=3152956) at eval.c:3083 #29 0x796c4 in execute_optimized_program (program=0xffbee1cc "", stack_depth=0, constants_data=0x9f6790) at bytecode.c:649 #30 0x78f20 in bytecode_arithop (obj1=2842624, obj2=3053572, opcode=4290700552) at bytecode.c:403 #31 0xaeab0 in Feval (form=0) at eval.c:3083 #32 0x7e2b4 in Fcall_interactively (function=10254188, record_flag=3053572, keys=3053572) at lisp.h:591 #33 0xad2d8 in signal_wrong_number_of_arguments_error (function=10146916, nargs=3053572) at eval.c:2041 #34 0x1023e8 in push_recent_keys (event=4751104) at event-stream.c:3607 #35 0x102d68 in pre_command_hook () at event-stream.c:3885 #36 0x885dc in Frecursive_edit () at lisp.h:591 #37 0x88370 in recursive_edit_unwind (buffer=3053572) at lisp.h:591 #38 0xaa9a0 in Fmacroexpand_internal (form=2818048, env=557860) at eval.c:1225 #39 0x888cc in Fcommand_loop_1 () at cmdloop.c:495