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arm-elf-gdb crash in get_frame_pc


I was single stepping through an arm-elf program when this crash occurred.

Cheers,
Shaun

$ arm-elf-gdb _build/kernel/kernel
GNU gdb 6.3.50.20051114-cvs
...
(arm-elf-gdb) s
Segmentation fault (core dumped)
$ gdb ~/bin/arm-elf-gdb core
...
Core was generated by `arm-elf-gdb _build/kernel/kernel'.
Program terminated with signal 11, Segmentation fault.
...
(gdb) f
#0  0x08143e19 in get_frame_pc (frame=0x0) at ../../gdb/frame.c:1321
1321      gdb_assert (frame->next != NULL);
(gdb) bt
#0  0x08143e19 in get_frame_pc (frame=0x0) at ../../gdb/frame.c:1321
#1  0x080c2a2c in insert_step_resume_breakpoint_at_frame (return_frame=0x0)
    at ../../gdb/infrun.c:2754
#2  0x080c58ed in handle_inferior_event (ecs=0xffffd1bc)
    at ../../gdb/infrun.c:2525
#3  0x080c607d in wait_for_inferior () at ../../gdb/infrun.c:1001
#4  0x080c6221 in proceed (addr=4294967295, siggnal=TARGET_SIGNAL_DEFAULT,
    step=1) at ../../gdb/infrun.c:826
#5  0x080bfe8c in step_1 (skip_subroutines=0, single_inst=0, count_string=0x0)
    at ../../gdb/infcmd.c:717
#6  0x08050a07 in execute_command (p=0x82ab991 "", from_tty=1)
    at ../../gdb/top.c:451
#7  0x080d16cf in command_handler (command=0x82ab990 "s")
    at ../../gdb/event-top.c:508
#8  0x080d1baf in command_line_handler (rl=0x836fd60 "")
    at ../../gdb/event-top.c:799
#9  0x081a7af5 in rl_callback_read_char () at ../../readline/callback.c:123
#10 0x080d102b in rl_callback_read_char_wrapper (client_data=0x0)
    at ../../gdb/event-top.c:174
#11 0x080d0852 in handle_file_event (event_file_desc=0)
    at ../../gdb/event-loop.c:728
#12 0x080d02f7 in process_event () at ../../gdb/event-loop.c:341
#13 0x080d0bd1 in gdb_do_one_event (data=0x0) at ../../gdb/event-loop.c:378
#14 0x080cde73 in catch_errors (func=0x80d0a50 <gdb_do_one_event>,
    func_args=0x0, errstring=0x8204fcd "", mask=6)
    at ../../gdb/exceptions.c:515
#15 0x08081883 in tui_command_loop (data=0x0) at ../../gdb/tui/tui-interp.c:151
#16 0x080ce14d in current_interp_command_loop () at ../../gdb/interps.c:278
#17 0x0804bb9b in captured_command_loop (data=0x0) at ../../gdb/main.c:101
#18 0x080cde73 in catch_errors (func=0x804bb90 <captured_command_loop>,
    func_args=0x0, errstring=0x8204fcd "", mask=6)
    at ../../gdb/exceptions.c:515
#19 0x0804c2b3 in captured_main (data=0xffffd8a6) at ../../gdb/main.c:834
#20 0x080cde73 in catch_errors (func=0x804bc00 <captured_main>,
    func_args=0xffffd6b8, errstring=0x8204fcd "", mask=6)
    at ../../gdb/exceptions.c:515
#21 0x0804bbf3 in gdb_main (args=0x0) at ../../gdb/main.c:843
#22 0x0804bb7f in main (argc=0, argv=0x0) at ../../gdb/gdb.c:35


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