Public bug reported:

Starting debugger gdb --nw --nx --batch --init-eval-command=set
debuginfod enabled on --command=/tmp/drkonqi.yucyXd
--command=/tmp/drkonqi.wsFhyu --core=/tmp/drkonqi-core.SUGyOQ/core
/usr/bin/dolphin

warning: Can't open file /usr/lib/x86_64-linux-gnu/libbrotlienc.so.1.2.0
(deleted) during file-backed mapping note processing

warning: Can't open file /usr/share/mime/mime.cache (deleted) during
file-backed mapping note processing

warning: Can't open file /usr/share/icons/hicolor/icon-theme.cache
(deleted) during file-backed mapping note processing

warning: Can't open file /usr/lib/locale/locale-archive (deleted) during
file-backed mapping note processing

warning: Can't open file /usr/lib/x86_64-linux-
gnu/libbrotlicommon.so.1.2.0 (deleted) during file-backed mapping note
processing

warning: Can't open file /usr/lib/x86_64-linux-gnu/libbrotlidec.so.1.2.0 
(deleted) during file-backed mapping note processing
[New LWP 4053615]
[New LWP 4073063]
[New LWP 700097]
[New LWP 544627]
[New LWP 700011]
[New LWP 4053616]
[New LWP 700217]
[New LWP 4073060]
[New LWP 4073061]
[New LWP 4053628]
[New LWP 4073062]
[New LWP 700520]
[New LWP 680186]
[New LWP 691066]
[New LWP 699760]
[New LWP 699964]
[New LWP 698278]
[New LWP 699803]
[New LWP 680187]
[New LWP 699761]

warning: Build-id of /usr/lib/x86_64-linux-gnu/libbrotlidec.so.1 does
not match core file.

warning: Build-id of /usr/lib/x86_64-linux-gnu/libbrotlicommon.so.1 does
not match core file.

warning: Build-id of /usr/lib/x86_64-linux-gnu/libbrotlienc.so.1 does
not match core file.

warning: Could not load shared library symbols for 3 libraries, e.g. 
/usr/lib/x86_64-linux-gnu/libbrotlidec.so.1.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/bin/dolphin'.
Program terminated with signal SIGSEGV, Segmentation fault.
Download failed: Invalid argument.  Continuing without source file 
./nptl/./nptl/pthread_kill.c.
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=11, 
no_tid=0) at ./nptl/pthread_kill.c:44

warning: 44     ./nptl/pthread_kill.c: No such file or directory
[Current thread is 1 (Thread 0x7dd3122d7f00 (LWP 4053615))]
Using eu-unstrip to resolve modules.
Traceback (most recent call last):
  File "/usr/share/drkonqi/gdb/python/gdb_preamble/preamble.py", line 667, in 
print_preamble
    print_preamble_internal()
    ~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/share/drkonqi/gdb/python/gdb_preamble/preamble.py", line 641, in 
print_preamble_internal
    resolve_modules()
    ~~~~~~~~~~~~~~~^^
  File "/usr/share/drkonqi/gdb/python/gdb_preamble/preamble.py", line 638, in 
resolve_modules
    resolve_modules_eu_unstrip(corefile)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/usr/share/drkonqi/gdb/python/gdb_preamble/preamble.py", line 606, in 
resolve_modules_eu_unstrip
    image = EUUnstripCoreImage(line)
  File "/usr/share/drkonqi/gdb/python/gdb_preamble/preamble.py", line 573, in 
__init__
    raise DeletedMappingException(f'Unexpectedly stumbled over a deleted 
mapping: {eu_unstrip_line}')
DeletedMappingException: Unexpectedly stumbled over a deleted mapping: 
0x7dd2f2a2c000+0xa9000 dad84137fbb8c89f3af0fd54fd6ce3a58eb5503d@0x7dd2f2a2c2f0 
- - /usr/lib/x86_64-linux-gnu/libbrotlienc.so.1.2.0 (deleted)
Unexpectedly stumbled over a deleted mapping: 0x7dd2f2a2c000+0xa9000 
dad84137fbb8c89f3af0fd54fd6ce3a58eb5503d@0x7dd2f2a2c2f0 - - 
/usr/lib/x86_64-linux-gnu/libbrotlienc.so.1.2.0 (deleted)
Sentry is attempting to send 2 pending events
Waiting up to 30 seconds
Press Ctrl-C to quit
Debugging ended with exit code '1' and exit status 'NormalExit'

ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: dolphin 4:25.12.3-0ubuntu1
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
Uname: Linux 7.0.0-38-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Tue Oct 27 22:57:17 2026
InstallationDate: Installed on 2026-10-14 (13 days ago)
InstallationMedia: Kubuntu 26.04.1 LTS "Resolute Raccoon" - Release amd64 
(20260826.1)
SourcePackage: dolphin
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: dolphin (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug resolute wayland-session

** Attachment added: "Screenshot_20261027_225806.png"
   
https://bugs.launchpad.net/bugs/2172346/+attachment/6013066/+files/Screenshot_20261027_225806.png

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https://bugs.launchpad.net/bugs/2172346

Title:
  Dolphin crashed

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