Removing one word: Breakpoint 3, text_read_only (propval=58721329) at /Users/magnus/src/emacs/src/textprop.c:89 89 Fsignal (Qtext_read_only, STRINGP (propval) ? Fcons (propval, Qnil) : Qnil); (gdb) bt #0 text_read_only (propval=58721329) at /Users/magnus/src/emacs/src/textprop.c:89 #1 0x000a3ee8 in prepare_to_modify_buffer (start=2663756, end=13, preserve_ptr=0x38395b8) at /Users/magnus/src/emacs/src/insdel.c:2036 #2 0x000a3ee8 in prepare_to_modify_buffer (start=2663756, end=13, preserve_ptr=0x38395b8) at /Users/magnus/src/emacs/src/insdel.c:2036 #3 0x000a36f4 in del_range_1 (from=13, to=2684688, prepare=1, ret_string=13) at /Users/magnus/src/emacs/src/insdel.c:1794 #4 0x000e0cb4 in Fdelete_and_extract_region (start=104, end=152) at /Users/magnus/src/emacs/src/editfns.c:2929 #5 0x000e9268 in Ffuncall (nargs=58721329, args=0x38395b8) at /Users/magnus/src/emacs/src/eval.c:2760 #6 0x00115b9c in Fbyte_code (bytestr=58721281, vector=19, maxdepth=58955192) at /Users/magnus/src/emacs/src/bytecode.c:686 #7 0x000e8588 in Feval (form=58721281) at /Users/magnus/src/emacs/src/eval.c:2118 #8 0x000e6f94 in Fcondition_case (args=58721281) at /Users/magnus/src/emacs/src/eval.c:1314 #9 0x00116404 in Fbyte_code (bytestr=1985619, vector=143, maxdepth=-1073748528) at /Users/magnus/src/emacs/src/bytecode.c:864 #10 0x000e988c in funcall_lambda (fun=-1073748528, nargs=2, arg_vector=0x28524c) at /Users/magnus/src/emacs/src/eval.c:2944 #11 0x000e93b8 in Ffuncall (nargs=58721329, args=0xbfffe5d0) at /Users/magnus/src/emacs/src/eval.c:2814 #12 0x00115b9c in Fbyte_code (bytestr=1985619, vector=143, maxdepth=-1073748528) at /Users/magnus/src/emacs/src/bytecode.c:686 #13 0x000e988c in funcall_lambda (fun=-1073748528, nargs=2, arg_vector=0x28524c) at /Users/magnus/src/emacs/src/eval.c:2944 #14 0x000e93b8 in Ffuncall (nargs=58721329, args=0xbfffe5d0) at /Users/magnus/src/emacs/src/eval.c:2814 #15 0x00115b9c in Fbyte_code (bytestr=1985619, vector=143, maxdepth=-1073748528) at /Users/magnus/src/emacs/src/bytecode.c:686 #16 0x000e988c in funcall_lambda (fun=-1073748528, nargs=2, arg_vector=0x28524c) at /Users/magnus/src/emacs/src/eval.c:2944 #17 0x000e93b8 in Ffuncall (nargs=58721329, args=0xbfffe5d0) at /Users/magnus/src/emacs/src/eval.c:2814 #18 0x000e4f34 in Fcall_interactively (function=1985640, record_flag=1, keys=8) at /Users/magnus/src/emacs/src/callint.c:877 #19 0x0008c1ec in Fcommand_execute (cmd=58769569, record_flag=1985648, keys=4, special=2687268) at /Users/magnus/src/emacs/src/keyboard.c:9679 #20 0x00080e54 in command_loop_1 () at /Users/magnus/src/emacs/src/keyboard.c:1779 #21 0x000e70f8 in internal_condition_case (bfun=0x7fd44 , handlers=58766401, hfun=0x7f6d4 ) at /Users/magnus/src/emacs/src/eval.c:1367 #22 0x0007fafc in command_loop_2 () at /Users/magnus/src/emacs/src/keyboard.c:1309 #23 0x000e6b6c in internal_catch (tag=58721329, func=0x7fabc , arg=58721281) at /Users/magnus/src/emacs/src/eval.c:1128 #24 0x0007fa54 in command_loop () at /Users/magnus/src/emacs/src/keyboard.c:1288 #25 0x0007f43c in recursive_edit_1 () at /Users/magnus/src/emacs/src/keyboard.c:981 #26 0x0007f5d4 in Frecursive_edit () at /Users/magnus/src/emacs/src/keyboard.c:1042 #27 0x0007e0d4 in main (argc=-1073748560, argv=0x1e4c68) at /Users/magnus/src/emacs/src/emacs.c:1736