(gdb) run -f wl
Starting program: /export/CHROOT/usr/pkgsrc/wip/emacs-current/work/emacs/src/emacs -f wl

Program received signal SIGSEGV, Segmentation fault.
[Switching to LWP 1]
0x0000000000575ec8 in balance_an_interval ()
(gdb) bt
#0  0x0000000000575ec8 in balance_an_interval ()
#1  0x0000000000576a6f in split_interval_right ()
#2  0x0000000000579212 in copy_intervals ()
#3  0x000000000057929f in copy_intervals_to_string ()
#4  0x000000000052eaef in make_buffer_string_both ()
#5  0x00000000004ebdfc in del_range_2 ()
#6  0x00000000004ed1f9 in del_range_1 ()
#7  0x0000000000485237 in encode_coding_object ()
#8  0x000000000048538e in code_convert_region.clone.13 ()
#9  0x0000000000533132 in Ffuncall ()
#10 0x0000000000564cf8 in exec_byte_code ()
#11 0x0000000000532b7d in funcall_lambda ()
#12 0x0000000000532eed in Ffuncall ()
#13 0x0000000000564cf8 in exec_byte_code ()
#14 0x0000000000532b7d in funcall_lambda ()
#15 0x0000000000532eed in Ffuncall ()
#16 0x0000000000564cf8 in exec_byte_code ()
#17 0x0000000000532b7d in funcall_lambda ()
#18 0x0000000000532eed in Ffuncall ()
#19 0x0000000000530515 in Fcall_interactively ()
#20 0x0000000000533149 in Ffuncall ()
#21 0x0000000000564cf8 in exec_byte_code ()
#22 0x0000000000532eed in Ffuncall ()
#23 0x00000000005332f5 in call1 ()
#24 0x00000000004d538b in command_loop_1 ()
#25 0x0000000000531784 in internal_condition_case ()
#26 0x00000000004cac9b in command_loop_2 ()
#27 0x0000000000531662 in internal_catch ()
#28 0x00000000004cba54 in recursive_edit_1 ()
#29 0x00000000004cbce0 in Frecursive_edit ()
#30 0x00000000004c7b02 in main ()