This appeared at the end of the update today:

Building initramfs for linux-fallback

error: unable to write to pipe (Broken pipe)
Creating temporary files...
Updating the info directory file...
Updating the desktop file MIMtype cache...
Updating the MIMtype database...
free(): chunks in smallbin corrupted

Command finished with errors!

Also, possibly connected or not, I got a notification which, on clicking it, showed me this:

        PID: 3473 (qt-sudo)
       UID: 1000 (george)
       GID: 1001 (george)
    Signal: 6 (ABRT)
 Timestamp: Thu 2026-04-16 11:44:13 EDT (11min ago)

Command Line: /usr/bin/qt-sudo -d /usr/lib/octopi/octphelper -ts
Executable: /usr/bin/qt-sudo
Control Group: /user.slice/user-1000.slice/user@1000.service/app.slice/app-octopi\x2dnotifier@autostart.service
Unit: user@1000.service
User Unit: app-octopi\x2dnotifier@autostart.service
Slice: user-1000.slice
Owner UID: 1000 (george)
Boot ID: ee75ca6e35584e6385e7f22e2d869724
Machine ID: 08c500ae9ba14d469c9640aa8047bff2
Hostname: F16
Storage: /var/lib/systemd/coredump/core.qt-sudo.1000.ee75ca6e35584e6385e7f22e2d869724.3473.1776354253000000.zst (present)
Size on Disk: 2.6M
Message: Process 3473 (qt-sudo) of user 1000 dumped core.

            Stack trace of thread 3473:
            #0  0x00007f2344ea5d4c __pthread_kill_implementation (libc.so.6 + 0x90d4c)
            #1  0x00007f2344e51422 raise (libc.so.6 + 0x3c422)
            #2  0x00007f2344e39f11 abort (libc.so.6 + 0x24f11)
            #3  0x00007f2344e3aec5 __libc_message_impl.cold (libc.so.6 + 0x25ec5)
            #4  0x00007f2344eaf355 malloc_printerr (libc.so.6 + 0x9a355)
            #5  0x00007f2344eaff4c _int_free_create_chunk (libc.so.6 + 0x9af4c)
            #6  0x00007f2344eb1148 _int_free_merge_chunk (libc.so.6 + 0x9c148)
            #7  0x00007f2344eb13c2 _int_free_chunk (libc.so.6 + 0x9c3c2)
            #8  0x00007f2344a7d56a hb_font_destroy (libharfbuzz.so.0 + 0x5456a)
            #9  0x00007f23449cd07a n/a (libfreetype.so.6 + 0x6607a)
            #10 0x00007f23449804dc n/a (libfreetype.so.6 + 0x194dc)
            #11 0x00007f2344980666 FT_Done_Face (libfreetype.so.6 + 0x19666)
            #12 0x00007f234631dd2c _ZN13QFreetypeFace7cleanupEv (libQt6Gui.so.6 + 0x71dd2c)
            #13 0x00007f234632bf49 _ZN13QFreetypeFace7releaseERKN11QFontEngine6FaceIdE (libQt6Gui.so.6 + 0x72bf49)
            #14 0x00007f234632c3d8 _ZN13QFontEngineFTD2Ev (libQt6Gui.so.6 + 0x72c3d8)
            #15 0x00007f234632c522 _ZN13QFontEngineFTD0Ev (libQt6Gui.so.6 + 0x72c522)
            #16 0x00007f23460f730d _ZN16QFontEngineMultiD2Ev (libQt6Gui.so.6 + 0x4f730d)
            #17 0x00007f234633bc32 _ZN26QFontEngineMultiFontConfigD0Ev (libQt6Gui.so.6 + 0x73bc32)
            #18 0x00007f23460cda11 _ZN10QFontCache5clearEv (libQt6Gui.so.6 + 0x4cda11)
            #19 0x00007f23460cddbf _ZN10QFontCacheD2Ev (libQt6Gui.so.6 + 0x4cddbf)
            #20 0x00007f23460d7bda _ZN10QFontCacheD4Ev (libQt6Gui.so.6 + 0x4d7bda)
            #21 0x00007f234579c440 _ZN18QThreadStorageData3setEPv (libQt6Core.so.6 + 0x39c440)
            #22 0x00007f2345de28d2 _ZN22QGuiApplicationPrivateD2Ev (libQt6Gui.so.6 + 0x1e28d2)
            #23 0x00007f2346785462 _ZN19QApplicationPrivateD0Ev (libQt6Widgets.so.6 + 0x185462)
            #24 0x0000000000408131 n/a (/usr/bin/qt-sudo + 0x8131)
            #25 0x00007f2344e3bbe4 __libc_start_call_main (libc.so.6 + 0x26be4)
            #26 0x00007f2344e3bc97 __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x26c97)
            #27 0x0000000000407c31 n/a (/usr/bin/qt-sudo + 0x7c31)
            
            Stack trace of thread 3474:
            #0  0x00007f2344eabd3e __syscall_cancel_arch (libc.so.6 + 0x96d3e)
            #1  0x00007f2344ea0c74 __internal_syscall_cancel (libc.so.6 + 0x8bc74)
            #2  0x00007f2344ea0cbd __syscall_cancel (libc.so.6 + 0x8bcbd)
            #3  0x00007f2344f13330 ppoll (libc.so.6 + 0xfe330)
            #4  0x00007f2344d1f9f5 n/a (libglib-2.0.so.0 + 0x5c9f5)
            #5  0x00007f2344d2008c g_main_context_iteration (libglib-2.0.so.0 + 0x5d08c)
            #6  0x00007f23458e3618 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x4e3618)
            #7  0x00007f23455b3553 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x1b3553)
            #8  0x00007f23456db7ed _ZN7QThread4execEv (libQt6Core.so.6 + 0x2db7ed)
            #9  0x00007f2344c24d5e _ZN22QDBusConnectionManager3runEv (libQt6DBus.so.6 + 0x40d5e)
            #10 0x00007f234579544c _ZN14QThreadPrivate5startEPv (libQt6Core.so.6 + 0x39544c)
            #11 0x00007f2344ea4085 start_thread (libc.so.6 + 0x8f085)
            #12 0x00007f2344f1f338 __clone3 (libc.so.6 + 0x10a338)
            
            Stack trace of thread 3480:
            #0  0x00007f2344eabd3e __syscall_cancel_arch (libc.so.6 + 0x96d3e)
            #1  0x00007f2344ea0c74 __internal_syscall_cancel (libc.so.6 + 0x8bc74)
            #2  0x00007f2344ea127c __futex_abstimed_wait_common (libc.so.6 + 0x8c27c)
            #3  0x00007f2344ea3748 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x8e748)
            #4  0x00007f2334a68fc9 n/a (libgallium-26.0.4.so + 0x668fc9)
            #5  0x00007f2334a2113c n/a (libgallium-26.0.4.so + 0x62113c)
            #6  0x00007f2334a68f07 n/a (libgallium-26.0.4.so + 0x668f07)
            #7  0x00007f2344ea4085 start_thread (libc.so.6 + 0x8f085)
            #8  0x00007f2344f1f338 __clone3 (libc.so.6 + 0x10a338)
            
            Stack trace of thread 3478:
            #0  0x00007f2344eabd3e __syscall_cancel_arch (libc.so.6 + 0x96d3e)
            #1  0x00007f2344ea0c74 __internal_syscall_cancel (libc.so.6 + 0x8bc74)
            #2  0x00007f2344ea127c __futex_abstimed_wait_common (libc.so.6 + 0x8c27c)
            #3  0x00007f2344ea3748 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x8e748)
            #4  0x00007f2334a68fc9 n/a (libgallium-26.0.4.so + 0x668fc9)
            #5  0x00007f2334a2113c n/a (libgallium-26.0.4.so + 0x62113c)
            #6  0x00007f2334a68f07 n/a (libgallium-26.0.4.so + 0x668f07)
            #7  0x00007f2344ea4085 start_thread (libc.so.6 + 0x8f085)
            #8  0x00007f2344f1f338 __clone3 (libc.so.6 + 0x10a338)
            
            Stack trace of thread 3483:
            #0  0x00007f2344eabd3e __syscall_cancel_arch (libc.so.6 + 0x96d3e)
            #1  0x00007f2344ea0c74 __internal_syscall_cancel (libc.so.6 + 0x8bc74)
            #2  0x00007f2344ea127c __futex_abstimed_wait_common (libc.so.6 + 0x8c27c)
            #3  0x00007f2344ea3748 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x8e748)
            #4  0x00007f2334a68fc9 n/a (libgallium-26.0.4.so + 0x668fc9)
            #5  0x00007f2334a2113c n/a (libgallium-26.0.4.so + 0x62113c)
            #6  0x00007f2334a68f07 n/a (libgallium-26.0.4.so + 0x668f07)
            #7  0x00007f2344ea4085 start_thread (libc.so.6 + 0x8f085)
            #8  0x00007f2344f1f338 __clone3 (libc.so.6 + 0x10a338)
            
            Stack trace of thread 3481:
            #0  0x00007f2344eabd3e __syscall_cancel_arch (libc.so.6 + 0x96d3e)
            #1  0x00007f2344ea0c74 __internal_syscall_cancel (libc.so.6 + 0x8bc74)
            #2  0x00007f2344ea127c __futex_abstimed_wait_common (libc.so.6 + 0x8c27c)
            #3  0x00007f2344ea3748 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x8e748)
            #4  0x00007f2334a68fc9 n/a (libgallium-26.0.4.so + 0x668fc9)
            #5  0x00007f2334a2113c n/a (libgallium-26.0.4.so + 0x62113c)
            #6  0x00007f2334a68f07 n/a (libgallium-26.0.4.so + 0x668f07)
            #7  0x00007f2344ea4085 start_thread (libc.so.6 + 0x8f085)
            #8  0x00007f2344f1f338 __clone3 (libc.so.6 + 0x10a338)
            
            Stack trace of thread 3477:
            #0  0x00007f2344eabd3e __syscall_cancel_arch (libc.so.6 + 0x96d3e)
            #1  0x00007f2344ea0c74 __internal_syscall_cancel (libc.so.6 + 0x8bc74)
            #2  0x00007f2344ea127c __futex_abstimed_wait_common (libc.so.6 + 0x8c27c)
            #3  0x00007f2344ea3748 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x8e748)
            #4  0x00007f2334a68fc9 n/a (libgallium-26.0.4.so + 0x668fc9)
            #5  0x00007f2334a2113c n/a (libgallium-26.0.4.so + 0x62113c)
            #6  0x00007f2334a68f07 n/a (libgallium-26.0.4.so + 0x668f07)
            #7  0x00007f2344ea4085 start_thread (libc.so.6 + 0x8f085)
            #8  0x00007f2344f1f338 __clone3 (libc.so.6 + 0x10a338)
            
            Stack trace of thread 3476:
            #0  0x00007f2344eabd3e __syscall_cancel_arch (libc.so.6 + 0x96d3e)
            #1  0x00007f2344ea0c74 __internal_syscall_cancel (libc.so.6 + 0x8bc74)
            #2  0x00007f2344ea0cbd __syscall_cancel (libc.so.6 + 0x8bcbd)
            #3  0x00007f2344f12e76 __poll (libc.so.6 + 0xfde76)
            #4  0x00007f2343d9c6cb poll (libQt6WaylandClient.so.6 + 0x956cb)
            #5  0x00007f234579544c _ZN14QThreadPrivate5startEPv (libQt6Core.so.6 + 0x39544c)
            #6  0x00007f2344ea4085 start_thread (libc.so.6 + 0x8f085)
            #7  0x00007f2344f1f338 __clone3 (libc.so.6 + 0x10a338)
            
            Stack trace of thread 3479:
            #0  0x00007f2344eabd3e __syscall_cancel_arch (libc.so.6 + 0x96d3e)
            #1  0x00007f2344ea0c74 __internal_syscall_cancel (libc.so.6 + 0x8bc74)
            #2  0x00007f2344ea127c __futex_abstimed_wait_common (libc.so.6 + 0x8c27c)
            #3  0x00007f2344ea3748 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x8e748)
            #4  0x00007f2334a68fc9 n/a (libgallium-26.0.4.so + 0x668fc9)
            #5  0x00007f2334a2113c n/a (libgallium-26.0.4.so + 0x62113c)
            #6  0x00007f2334a68f07 n/a (libgallium-26.0.4.so + 0x668f07)
            #7  0x00007f2344ea4085 start_thread (libc.so.6 + 0x8f085)
            #8  0x00007f2344f1f338 __clone3 (libc.so.6 + 0x10a338)
            
            Stack trace of thread 3475:
            #0  0x00007f2344eabd3e __syscall_cancel_arch (libc.so.6 + 0x96d3e)
            #1  0x00007f2344ea0c74 __internal_syscall_cancel (libc.so.6 + 0x8bc74)
            #2  0x00007f2344ea0cbd __syscall_cancel (libc.so.6 + 0x8bcbd)
            #3  0x00007f2344f12e76 __poll (libc.so.6 + 0xfde76)
            #4  0x00007f2343d9c6cb poll (libQt6WaylandClient.so.6 + 0x956cb)
            #5  0x00007f234579544c _ZN14QThreadPrivate5startEPv (libQt6Core.so.6 + 0x39544c)
            #6  0x00007f2344ea4085 start_thread (libc.so.6 + 0x8f085)
            #7  0x00007f2344f1f338 __clone3 (libc.so.6 + 0x10a338)
            
            Stack trace of thread 3482:
            #0  0x00007f2344eabd3e __syscall_cancel_arch (libc.so.6 + 0x96d3e)
            #1  0x00007f2344ea0c74 __internal_syscall_cancel (libc.so.6 + 0x8bc74)
            #2  0x00007f2344ea127c __futex_abstimed_wait_common (libc.so.6 + 0x8c27c)
            #3  0x00007f2344ea3748 pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0x8e748)
            #4  0x00007f2334a68fc9 n/a (libgallium-26.0.4.so + 0x668fc9)
            #5  0x00007f2334a2113c n/a (libgallium-26.0.4.so + 0x62113c)
            #6  0x00007f2334a68f07 n/a (libgallium-26.0.4.so + 0x668f07)
            #7  0x00007f2344ea4085 start_thread (libc.so.6 + 0x8f085)
            #8  0x00007f2344f1f338 __clone3 (libc.so.6 + 0x10a338)
            ELF object binary architecture: AMD x86-64