https://bugs.kde.org/show_bug.cgi?id=526430
Bug ID: 526430
Summary: kasts (flatpak) crash immediately after start
Classification: Applications
Product: kasts
Version First 26.08.1
Reported In:
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
PID: 26555 (kasts-bin)
UID: 1000
GID: 1000
Signal: 11 (SEGV)
Timestamp: Tue 2026-09-29 20:12:58 CEST (2s ago)
Command Line: kasts-bin
Executable: /app/bin/kasts-bin
Control Group:
/user.slice/user-1000.slice/[email protected]/app.slice/app-flatpak-org.kde.kasts-2830200935.scope
Unit: [email protected]
User Unit: app-flatpak-org.kde.kasts-2830200935.scope
Slice: user-1000.slice
Owner UID: 1000
Boot ID: e10e8c5e49ea4681ab72b18f27d5de63
Storage:
/var/lib/systemd/coredump/core.kasts-bin.1000.e10e8c5e49ea4681ab72b18f27d5de63.26555.1790705578000000.zst
(present)
Size on Disk: 7M
Message: Process 26555 (kasts-bin) of user 1000 dumped core.
Module linux-vdso.so.1 from deb linux-7.0.0-34.34.amd64
Stack trace of thread 2:
#0 0x00007795cabb924c n/a
(/usr/lib/x86_64-linux-gnu/libfontconfig.so.1.16.0 + 0xc24c)
#1 0x00007795cc97395c n/a
(/usr/lib/x86_64-linux-gnu/libQt6Gui.so.6.11.2 + 0x77395c)
#2 0x00007795cc722885 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Gui.so.6.11.2 + 0x522885)
#3 0x00007795cc7b3a70 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Gui.so.6.11.2 + 0x5b3a70)
#4 0x00007795cc7b67b5 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Gui.so.6.11.2 + 0x5b67b5)
#5 0x00007795cc727ef4 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Gui.so.6.11.2 + 0x527ef4)
#6 0x00007795cde9bb72 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Quick.so.6.11.2 + 0x49bb72)
#7 0x00007795cde9bc05 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Quick.so.6.11.2 + 0x49bc05)
#8 0x00007795cde9c079 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Quick.so.6.11.2 + 0x49c079)
#9 0x00007795cd490342 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x290342)
#10 0x00007795cd491fd4 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x291fd4)
#11 0x00007795cd50a587 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x30a587)
#12 0x00007795cd50e29f n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x30e29f)
#13 0x00007795cd430850 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x230850)
#14 0x00007795cd5c42b4 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x3c42b4)
#15 0x00007795cd549509 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x349509)
#16 0x00007795cd54961a n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x34961a)
#17 0x00007795cd54d628 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x34d628)
#18 0x00007795cd5fa5b7 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x3fa5b7)
#19 0x00007795cd56c145 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x36c145)
#20 0x00007795cd57242c n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x37242c)
#21 0x00007795cd5727b4 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x3727b4)
#22 0x00007795cd572b00 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x372b00)
#23 0x00007795cd547e03 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x347e03)
#24 0x00007795cd5483d1 n/a
(/usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.11.2 + 0x3483d1)
#25 0x00006191d7532062 n/a (/app/bin/kasts-bin + 0x87062)
#26 0x00007795cb42c975 n/a (/usr/lib/x86_64-linux-gnu/libc.so.6
+ 0x2b975)
#27 0x00007795cb42ca28 n/a (/usr/lib/x86_64-linux-gnu/libc.so.6
+ 0x2ba28)
#28 0x00006191d75350f5 n/a (/app/bin/kasts-bin + 0x8a0f5)
ELF object binary architecture: AMD x86-64
DESCRIPTION
kasts crash after starting.
STEPS TO REPRODUCE
1. Start kasts (Flatpak)
2.
3.
SOFTWARE/OS VERSIONS
Operating System: Kubuntu 26.04 LTS
KDE Plasma Version: 6.6.6
KDE Frameworks Version: 6.24.0
Qt Version: 6.10.2
Kernel Version: 7.0.0-34-generic (64-bit)
Graphics Platform: Wayland
Flatpak: 1.16.6-1
ADDITIONAL INFORMATION
Downgrade to flatpak commit
"26b6e38b116b47f38c2f1c46a17174a1a54f328226015ea8f14bdae66a299154" from
2026-07-18 with same result.
Starting with kernel version 7.0.0-31 with same result.
Clear cache with same result.
Renaming user dir ".var/app/org.kde.kasts" with same result.
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