bug#21602: 25.0.50; coding system seg fault

[Richard Stallman]

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C backtrace followed by Lisp backtrace

#0  0x0816c2af in AREF (array=0, idx=2) at lisp.h:1474
#1  0x080f9cf9 in coding_inherit_eol_type (coding_system=1216824, parent=0)
    at coding.c:6005
#2  0x081b53b5 in choose_write_coding_system (start=6, end=22818, 
    filename=140507116, append=0, visit=0, lockname=140507116, 
    coding=0xbfffdef8) at fileio.c:4619
#3  0x081b58ab in write_region (start=6, end=22818, filename=140507116, 
    append=0, visit=0, lockname=140507116, mustbenew=0, desc=-1)
    at fileio.c:4793
#4  0x081b5473 in Fwrite_region (start=6, end=22818, filename=140507148, 
    append=0, visit=0, lockname=0, mustbenew=0) at fileio.c:4667
#5  0x081fee43 in eval_sub (form=143801747) at eval.c:2213
#6  0x081fb916 in Fprogn (body=143801915) at eval.c:453
#7  0x081fc4e2 in FletX (args=143801739) at eval.c:904
#8  0x081fea38 in eval_sub (form=143803323) at eval.c:2139
#9  0x081fb916 in Fprogn (body=143801955) at eval.c:453
#10 0x08200846 in funcall_lambda (fun=143801987, nargs=1, 
    arg_vector=0xbfffe3f0) at eval.c:2952
#11 0x082003bb in apply_lambda (fun=143801987, args=143815411, count=19)
    at eval.c:2834
#12 0x081ff0a1 in eval_sub (form=143815403) at eval.c:2264
#13 0x081fb916 in Fprogn (body=143815419) at eval.c:453
#14 0x081fb85b in Fif (args=143815371) at eval.c:405
#15 0x081fea38 in eval_sub (form=143815163) at eval.c:2139
#16 0x081fb916 in Fprogn (body=143815427) at eval.c:453
#17 0x081fc81e in Flet (args=143803179) at eval.c:974
#18 0x081fea38 in eval_sub (form=143803187) at eval.c:2139
#19 0x081fb916 in Fprogn (body=143803203) at eval.c:453
#20 0x081ee94d in Fsave_excursion (args=143803203) at editfns.c:1018
#21 0x081fea38 in eval_sub (form=143803195) at eval.c:2139
#22 0x081fb916 in Fprogn (body=143803227) at eval.c:453
#23 0x08200846 in funcall_lambda (fun=143803211, nargs=0, 
    arg_vector=0xbfffea08) at eval.c:2952
#24 0x0820019e in Ffuncall (nargs=1, args=0xbfffea04) at eval.c:2787
#25 0x0823d229 in exec_byte_code (bytestr=140534860, vector=143349373, 
    maxdepth=34, args_template=0, nargs=0, args=0x0) at bytecode.c:919
#26 0x082008e3 in funcall_lambda (fun=143196117, nargs=0, arg_vector=0x88b567d)
    at eval.c:2959
#27 0x082000d6 in Ffuncall (nargs=1, args=0xbfffef28) at eval.c:2775
#28 0x081f8c44 in Ffuncall_interactively (nargs=1, args=0xbfffef28)
    at callint.c:252
#29 0x081ffd72 in Ffuncall (nargs=2, args=0xbfffef24) at eval.c:2706
#30 0x081ff195 in Fapply (nargs=3, args=0xbfffef24) at eval.c:2297
#31 0x081f8fea in Fcall_interactively (function=744440, record_flag=0, 
    keys=139677285) at callint.c:394
#32 0x081ffeaa in Ffuncall (nargs=4, args=0xbffff00c) at eval.c:2733
#33 0x0823d229 in exec_byte_code (bytestr=137858540, vector=137858557, 
    maxdepth=54, args_template=4102, nargs=1, args=0xbffff340)
    at bytecode.c:919
#34 0x082005c9 in funcall_lambda (fun=137858517, nargs=1, 
    arg_vector=0xbffff33c) at eval.c:2893
#35 0x082000d6 in Ffuncall (nargs=2, args=0xbffff338) at eval.c:2775
#36 0x081ff9b3 in call1 (fn=7296, arg1=744440) at eval.c:2581
#37 0x08173963 in command_loop_1 () at keyboard.c:1520
#38 0x081fd28a in internal_condition_case (bfun=0x8173170 <command_loop_1>, 
    handlers=9336, hfun=0x8172986 <cmd_error>) at eval.c:1356
#39 0x08172e92 in command_loop_2 (ignore=0) at keyboard.c:1138
#40 0x081fcb94 in internal_catch (tag=22248, func=0x8172e67 <command_loop_2>, 
    arg=0) at eval.c:1116
#41 0x08172e2c in command_loop () at keyboard.c:1117
#42 0x081725e5 in recursive_edit_1 () at keyboard.c:723
#43 0x08172757 in Frecursive_edit () at keyboard.c:794
#44 0x08170748 in main (argc=2, argv=0xbffff664) at emacs.c:1629
Undefined command: "xback".  Try "help".
Warning: /home/rms/../lwlib: No such file or directory.
SIGINT is used by the debugger.
Are you sure you want to change it? (y or n) [answered Y; input not from 
terminal]
Environment variable "DISPLAY" not defined.
TERM = linux
Breakpoint 1 at 0x816ed85: file emacs.c, line 353.
Temporary breakpoint 2 at 0x818f7e0: file sysdep.c, line 903.
"write-region" (0xbfffe1d0)
"let*" (0xbfffe2c4)
"my-send-1" (0xbfffe3f0)
"if" (0xbfffe5a4)
"let" (0xbfffe724)
"save-excursion" (0xbfffe844)
"my-send-it" (0xbfffea08)
"mail-send" (0xbfffef2c)
"funcall-interactively" (0xbfffef28)
"call-interactively" (0xbffff010)
"command-execute" (0xbffff33c)

-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.