Segmentation fault in mcedit when going to Options -> Syntax file #4717
Description
Is there an existing issue for this?
- I have searched the existing issues
Midnight Commander version and build configuration
~ % ~/src/mc/master/build/install/bin/mc -V
GNU Midnight Commander 4.8.33-246-gf9ef9069eOperating system
~ % uname -a
Darwin Mac-1373 24.5.0 Darwin Kernel Version 24.5.0: Tue Apr 22 19:54:29 PDT 2025; root:xnu-11417.121.6~2/RELEASE_ARM64_T6030 arm64Is this issue reproducible using the latest version of Midnight Commander?
- I confirm the issue is still reproducible with the latest version of Midnight Commander
How to reproduce
Start mcedit and go to Options -> Syntax file.
Expected behavior
No segfault.
Actual behavior
(lldb) fr v
(const char *) text = 0x0000000000000000
(const ssize_t) width = -1
(size_t) width1 = 18446744073709551615
(gunichar) uni = 0
(size_t) left = 1
(char *) actual = 0x00000001000d6e40 "\b"
(lldb) bt all
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
* frame #0: 0x00000001000d6aa0 mc`str_utf8_make_make_term_form(text=0x0000000000000000, width=-1) at strutilutf8.c:457:24
frame #1: 0x00000001000d5e18 mc`str_utf8_trunc(text=0x0000000000000000, width=-1) at strutilutf8.c:875:16
frame #2: 0x00000001000cfaa8 mc`str_trunc(text=0x0000000000000000, width=-1) at strutil.c:797:12
frame #3: 0x00000001000b8764 mc`path_trunc(path=0x0000000000000000, width=-1) at util.c:323:15
frame #4: 0x0000000100029a30 mc`files_error(ctx=0x00006000015081c0, allow_retry=1, format="Cannot create target file\n%s", file1="/Users/zaytsev/.local/share/mc/syntax/Syntax", file2=0x0000000000000000) at file.c:1126:14
frame #5: 0x0000000100024f88 mc`file_error(ctx=0x00006000015081c0, allow_retry=1, format="Cannot create target file\n%s", file="/Users/zaytsev/.local/share/mc/syntax/Syntax") at file.c:3734:12
frame #6: 0x00000001000240e8 mc`copy_file_file(ctx=0x00006000015081c0, src_path="/Users/zaytsev/src/mc/master/build/install/share/mc/syntax/Syntax", dst_path="/Users/zaytsev/.local/share/mc/syntax/Syntax") at file.c:2613:21
frame #7: 0x000000010000ef64 mc`check_for_default(default_file_vpath=0x0000600002c205e0, file_vpath=0x0000600002c20680) at util.c:68:9
frame #8: 0x0000000100098cbc mc`edit_load_syntax_file(h=0x0000000112804080) at editcmd.c:1149:9
frame #9: 0x00000001000a778c mc`edit_dialog_command_execute(h=0x0000000112804080, command=509) at editwidget.c:419:9
frame #10: 0x00000001000a5b0c mc`edit_dialog_callback(w=0x0000000112804080, sender=0x000060000171c000, msg=MSG_ACTION, parm=509, data=0x0000000000000000) at editwidget.c:776:18
frame #11: 0x000000010010af34 mc`send_message(w=0x0000000112804080, sender=0x000060000171c000, msg=MSG_ACTION, parm=509, data=0x0000000000000000) at widget-common.h:255:15
frame #12: 0x000000010010ad0c mc`menubar_execute(menubar=0x000060000171c000) at menu.c:363:9
frame #13: 0x000000010010a42c mc`menubar_execute_cmd(menubar=0x000060000171c000, command=1) at menu.c:587:13
frame #14: 0x0000000100109c90 mc`menubar_handle_key(menubar=0x000060000171c000, key=10) at menu.c:614:15
frame #15: 0x0000000100108f2c mc`menubar_callback(w=0x000060000171c000, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=10, data=0x0000000000000000) at menu.c:679:13
frame #16: 0x00000001000fdd14 mc`send_message(w=0x000060000171c000, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=10, data=0x0000000000000000) at widget-common.h:255:15
frame #17: 0x00000001000fd018 mc`group_handle_hotkey(g=0x0000000112804080, key=10) at group.c:552:19
frame #18: 0x00000001000fc578 mc`group_default_callback(w=0x0000000112804080, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=10, data=0x0000000000000000) at group.c:640:16
frame #19: 0x00000001000fa7e4 mc`dlg_default_callback(w=0x0000000112804080, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=10, data=0x0000000000000000) at dialog.c:370:16
frame #20: 0x00000001000a5ccc mc`edit_dialog_callback(w=0x0000000112804080, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=10, data=0x0000000000000000) at editwidget.c:842:16
frame #21: 0x00000001000fdd14 mc`send_message(w=0x0000000112804080, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=10, data=0x0000000000000000) at widget-common.h:255:15
frame #22: 0x00000001000fce4c mc`group_handle_key(g=0x0000000112804080, key=10) at group.c:503:15
frame #23: 0x00000001000fc564 mc`group_default_callback(w=0x0000000112804080, sender=0x0000000000000000, msg=MSG_KEY, parm=10, data=0x0000000000000000) at group.c:637:16
frame #24: 0x00000001000fb460 mc`dlg_key_event(h=0x0000000112804080, d_key=10) at dialog.c:252:19
frame #25: 0x00000001000fb124 mc`dlg_process_event(h=0x0000000112804080, key=10, event=0x000000016fdfe720) at dialog.c:539:9
frame #26: 0x00000001000fb724 mc`frontend_dlg_run(h=0x0000000112804080) at dialog.c:321:9
frame #27: 0x00000001000fb594 mc`dlg_run(h=0x0000000112804080) at dialog.c:573:5
frame #28: 0x00000001000a59d0 mc`edit_files(files=0x0000600002c0ff20) at editwidget.c:1272:9
frame #29: 0x00000001000a5624 mc`edit_file(arg=0x000000016fdfe858) at editwidget.c:1201:10
frame #30: 0x000000010001ad8c mc`edit_file_at_line(what_vpath=0x0000600002c114e0, internal=1, start_line=0) at cmd.c:650:9
frame #31: 0x000000010001aea8 mc`do_edit(what_vpath=0x0000600002c114e0) at cmd.c:164:5
frame #32: 0x000000010001ae60 mc`edit_cmd(panel=0x00000001206055a0) at cmd.c:685:9
frame #33: 0x0000000100030274 mc`midnight_execute_cmd(sender=0x0000000120605940, command=44) at filemanager.c:1191:9
frame #34: 0x000000010002fbbc mc`midnight_callback(w=0x0000000121904080, sender=0x0000000120605940, msg=MSG_ACTION, parm=44, data=0x0000000000000000) at filemanager.c:1577:16
frame #35: 0x00000001000f9488 mc`send_message(w=0x0000000121904080, sender=0x0000000120605940, msg=MSG_ACTION, parm=44, data=0x0000000000000000) at widget-common.h:255:15
frame #36: 0x00000001000f9198 mc`buttonbar_call(bb=0x0000000120605940, i=3) at buttonbar.c:157:15
frame #37: 0x00000001000f8c14 mc`buttonbar_callback(w=0x0000000120605940, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=268, data=0x0000000000000000) at buttonbar.c:174:42
frame #38: 0x00000001000fdd14 mc`send_message(w=0x0000000120605940, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=268, data=0x0000000000000000) at widget-common.h:255:15
frame #39: 0x00000001000fd0dc mc`group_handle_hotkey(g=0x0000000121904080, key=268) at group.c:566:23
frame #40: 0x00000001000fc578 mc`group_default_callback(w=0x0000000121904080, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=268, data=0x0000000000000000) at group.c:640:16
frame #41: 0x00000001000fa7e4 mc`dlg_default_callback(w=0x0000000121904080, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=268, data=0x0000000000000000) at dialog.c:370:16
frame #42: 0x000000010002fbec mc`midnight_callback(w=0x0000000121904080, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=268, data=0x0000000000000000) at filemanager.c:1584:16
frame #43: 0x00000001000fdd14 mc`send_message(w=0x0000000121904080, sender=0x0000000000000000, msg=MSG_HOTKEY, parm=268, data=0x0000000000000000) at widget-common.h:255:15
frame #44: 0x00000001000fce4c mc`group_handle_key(g=0x0000000121904080, key=268) at group.c:503:15
frame #45: 0x00000001000fc564 mc`group_default_callback(w=0x0000000121904080, sender=0x0000000000000000, msg=MSG_KEY, parm=268, data=0x0000000000000000) at group.c:637:16
frame #46: 0x00000001000fb460 mc`dlg_key_event(h=0x0000000121904080, d_key=268) at dialog.c:252:19
frame #47: 0x00000001000fb124 mc`dlg_process_event(h=0x0000000121904080, key=268, event=0x000000016fdfed10) at dialog.c:539:9
frame #48: 0x00000001000fb724 mc`frontend_dlg_run(h=0x0000000121904080) at dialog.c:321:9
frame #49: 0x00000001000fb594 mc`dlg_run(h=0x0000000121904080) at dialog.c:573:5
frame #50: 0x000000010002f4a8 mc`do_nc at filemanager.c:1794:16
frame #51: 0x0000000100000cf0 mc`main(argc=1, argv=0x000000016fdff500) at main.c:431:21
frame #52: 0x000000019d142b98 dyld`start + 6076