Segmentation fault when pressing Ctrl+Backspace twice in quick succession

[rickytower]

Version: Minder 2.0.4
Operating System: Fedora Linux 43 (Workstation Edition)

Description:
Pressing Ctrl+Backspace twice in quick succession to delete words within a node causes a segmentation fault and crashes the application.

Steps to reproduce:

1. Open a node for editing
2. Type some text with multiple words
3. Press Ctrl+Backspace twice quickly
4. Application crashes with segmentation fault

Expected behavior:
The application should delete two words without crashing.

Actual behavior:
Segmentation fault occurs and the application terminates unexpectedly.

Additional information:
I've attached the backtrace, full backtrace, and some log messages obtained by launching the application from the terminal. The application was installed with sudo dnf debuginfo-install minder. I've attached the following files for further investigation:

log1.txt → log messages
bt.txt → backtrace
bt-full.txt → full backtrace

[phase1geo]

Just trying to replicate this issue on elementary OS 8.1 (using version 2.0.5). 2.0.5 isn't different from 2.0.4 in terms of node text editing. Just a data point for now. I'll give this a try on my Fedora VM this evening.

[phase1geo]

I attempted to replicate this issue on my Fedora VM with a Flatpak. Still not able to replicate the issue on my end. I even held down Control and Backspace (which is as fast as the keys can be hit quickly) and no issues.

[Pepusik]

Experiencing the same issue. Fedora 43 (KDE edition) , Flatpak version 2.0.9. It has also occurred on dnf version 2.0.4.

[Pepusik]

Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: string_slice: assertion '_tmp3_' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: string_splice: assertion '_tmp3_' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: g_regex_match_full: assertion 'string != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: pango_layout_set_text: assertion 'length == 0 || text != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: undo_text_buffer_add_delete: assertion 'orig_text != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: string_index_of_nth_char: assertion 'self != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: pango_layout_index_to_pos: assertion 'index >= 0' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: string_index_of_nth_char: assertion 'self != NULL' failed
Apr 30 15:07:55 fedora com.github.phase1geo.minder[16587]: pango_layout_index_to_pos: assertion 'index >= 0' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: string_index_of_nth_char: assertion 'self != NULL' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: pango_layout_index_to_pos: assertion 'index >= 0' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: string_index_of_nth_char: assertion 'self != NULL' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: pango_layout_index_to_pos: assertion 'index >= 0' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: string_index_of_nth_char: assertion 'self != NULL' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: pango_layout_index_to_pos: assertion 'index >= 0' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: string_index_of_nth_char: assertion 'self != NULL' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: pango_layout_index_to_pos: assertion 'index >= 0' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: g_utf8_strlen: assertion 'p != NULL || max == 0' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: g_utf8_strlen: assertion 'p != NULL || max == 0' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: string_index_of_nth_char: assertion 'self != NULL' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: pango_layout_index_to_line_x: assertion 'index >= 0' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: string_index_of_nth_char: assertion 'self != NULL' failed
Apr 30 15:07:56 fedora com.github.phase1geo.minder[16587]: pango_layout_index_to_pos: assertion 'index >= 0' failed
Apr 30 15:07:57 fedora com.github.phase1geo.minder[16587]: g_utf8_strlen: assertion 'p != NULL || max == 0' failed
Apr 30 15:07:58 fedora com.github.phase1geo.minder[16587]: string_index_of_nth_char: assertion 'self != NULL' failed
Apr 30 15:07:58 fedora audit[16587]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=3 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 pid=16587 comm="com.github.phas" exe="/app/bin/com.github.phase>
Apr 30 15:07:58 fedora com.github.phase1geo.minder[16587]: g_utf8_strlen: assertion 'p != NULL || max == 0' failed
Apr 30 15:07:58 fedora com.github.phase1geo.minder[16587]: string_index_of_nth_char: assertion 'self != NULL' failed
Apr 30 15:07:58 fedora com.github.phase1geo.minder[16587]: pango_layout_index_to_line_x: assertion 'index >= 0' failed
Apr 30 15:07:58 fedora kernel: show_signal_msg: 28 callbacks suppressed
Apr 30 15:07:58 fedora kernel: com.github.phas[16587]: segfault at 0 ip 00007fa104489a1c sp 00007ffd3ceed398 error 4 in libc.so.6[187a1c,7fa10432a000+175000] likely on CPU 8 (core 4, socket 0)
Apr 30 15:07:58 fedora kernel: Code: ff ff 48 89 f8 0f bc c9 f3 a4 c3 0f 1f 00 f3 0f 1e fa 89 f8 62 a1 fd 00 ef c0 25 ff 0f 00 00 3d e0 0f 00 00 0f 87 24 01 00 00 <62> f1 7d 20 74 07 c5 fb 93 c0 85 c0 74 >
Apr 30 15:07:58 fedora systemd-coredump[26151]: Process 16587 (com.github.phas) of user 1000 terminated abnormally with signal 11/SEGV, processing...
Apr 30 15:07:58 fedora systemd[1]: Created slice system-drkonqi\x2dcoredump\x2dprocessor.slice - Slice /system/drkonqi-coredump-processor.
Apr 30 15:07:58 fedora systemd[1]: Created slice system-systemd\x2dcoredump.slice - Slice /system/systemd-coredump.
Apr 30 15:07:58 fedora audit: BPF prog-id=87 op=LOAD
Apr 30 15:07:58 fedora audit: BPF prog-id=88 op=LOAD
Apr 30 15:07:58 fedora audit: BPF prog-id=89 op=LOAD
Apr 30 15:07:58 fedora systemd[1]: Started systemd-coredump@0-8196-26151_26152-0.service - Process Core Dump (PID 26151/UID 0).
Apr 30 15:07:58 fedora audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=systemd-coredump@0-8196-26151_26152-0 comm="systemd" exe="/usr/lib/syst>
Apr 30 15:07:58 fedora audit: BPF prog-id=90 op=LOAD
Apr 30 15:07:58 fedora audit: BPF prog-id=91 op=LOAD
Apr 30 15:07:58 fedora audit: BPF prog-id=92 op=LOAD
Apr 30 15:07:58 fedora systemd[1]: Started drkonqi-coredump-processor@0-8196-26151_26152-0.service - Pass systemd-coredump journal entries to relevant user for potential DrKonqi handling.
Apr 30 15:07:58 fedora audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=drkonqi-coredump-processor@0-8196-26151_26152-0 comm="systemd" exe="/us>
Apr 30 15:07:58 fedora (sd-parse-elf)[26168]: Could not parse number of program headers from core file: invalid `Elf' handle
Apr 30 15:07:58 fedora systemd-coredump[26156]: [🡕] Process 16587 (com.github.phas) of user 1000 dumped core.

                                                Module /usr/lib/x86_64-linux-gnu/libglycin-2.so.0 without build-id.
                                                Module /usr/lib/x86_64-linux-gnu/libglycin-2.so.0
                                                Stack trace of thread 2:
                                                #0  0x00007fa104489a1c n/a (/usr/lib/x86_64-linux-gnu/libc.so.6 + 0x187a1c)
                                                #1  0x00007fa104ef9b36 n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0xf9b36)
                                                #2  0x00007fa105e728a6 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x188a6)
                                                #3  0x00007fa105e8954d n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x2f54d)
                                                #4  0x00007fa105e90385 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x36385)
                                                #5  0x00007fa104fd516e n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0x1d516e)
                                                #6  0x00007fa104ef9b36 n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0xf9b36)
                                                #7  0x00007fa105e728a6 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x188a6)
                                                #8  0x00007fa105e8954d n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x2f54d)
                                                #9  0x00007fa105e90385 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x36385)
                                                #10 0x00007fa1051da91c n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0x3da91c)
                                                #11 0x0000559caad3a1fb n/a (/app/bin/com.github.phase1geo.minder + 0x531fb)
                                                #12 0x00007fa104efc6b8 n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0xfc6b8)
                                                #13 0x00007fa105e728a6 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x188a6)
                                                #14 0x00007fa105e8a319 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x30319)
                                                #14 0x00007fa105e8a319 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x30319)
                                                #15 0x00007fa105e900b8 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x360b8)
                                                #16 0x00007fa105e90173 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x36173)
                                                #17 0x00007fa104fb80d8 n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0x1b80d8)
                                                #18 0x00007fa105e75db3 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x1bdb3)
                                                #19 0x00007fa105e728a6 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x188a6)
                                                #20 0x00007fa105e8a319 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x30319)
                                                #21 0x00007fa105e900b8 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x360b8)
                                                #22 0x00007fa105e90173 n/a (/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.8600.5 + 0x36173)
                                                #23 0x00007fa104fb48cf n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0x1b48cf)
                                                #24 0x00007fa104fb5fe1 n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0x1b5fe1)
                                                #25 0x00007fa104fb9490 n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0x1b9490)
                                                #26 0x00007fa104f80c1d n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0x180c1d)
                                                #27 0x00007fa1050eae78 n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0x2eae78)
                                                #24 0x00007fa104fb5fe1 n/a (/usr/lib/x86_64-linux-gnu/libgtk-4.so.1.2000.4 + 0x1b5fe1)

Here is journalctl log.

[Pepusik]

Another observation: weirdly enough, it sometimes crashes only on one Ctrl + Backspace. Most of the time, however, it works completely fine. This behavior is pretty random.