Bug 463648

What distr

*** Bug 478205 has been marked as a duplicate of this bug. ***

*** Bug 480317 has been marked as a duplicate of this bug. ***

*** Bug 493825 has been marked as a duplicate of this bug. ***

*** Bug 493789 has been marked as a duplicate of this bug. ***

*** Bug 491774 has been marked as a duplicate of this bug. ***

*** Bug 474112 has been marked as a duplicate of this bug. ***

*** Bug 492627 has been marked as a duplicate of this bug. ***

From duplicate reports, affected software includes Plasma, System Settings, and Merkuro.

*** Bug 495044 has been marked as a duplicate of this bug. ***

*** Bug 501024 has been marked as a duplicate of this bug. ***

(In reply to Nate Graham from comment #11)
> *** Bug 501024 has been marked as a duplicate of this bug. ***

My bug report was resolved as a duplicate on this unresolved bug, that's been reported since DEC 2022. Just curious, has there been any progress listed elsewhere? I see are a number of other bugs marked as a duplicate, just not sure if there is something external that is also tracking this?

There's no progress listed elsewhere to my knowledge.

(In reply to Nate Graham from comment #1)
> What distr

Sorry I missed this. I can't say exactly but it would have either been Solus or Fedora.

*** Bug 501386 has been marked as a duplicate of this bug. ***

*** Bug 501333 has been marked as a duplicate of this bug. ***

(In reply to Justin Zobel from comment #14)
> (In reply to Nate Graham from comment #1)
> > What distr
> 
> Sorry I missed this. I can't say exactly but it would have either been Solus
> or Fedora.

I'm having this issue on Fedora, has anyone else had a similar issue on Solus?

(In reply to staroy25786 from comment #17)
> I'm having this issue on Fedora, has anyone else had a similar issue on
> Solus?

Not to my knowledge. There isn't anything on the Solus bug tracker https://issues.getsol.us
I also haven't seen anyone complain about this in support channels, nor have I had this crash on my 2 Solus systems

plasma-discover (fedora kinoite 41)

Thread 19 "QQmlThread" received signal SIGSEGV, Segmentation fault.
QQmlPropertyCacheCreator<QQmlTypeCompiler>::propertyCacheForObject (this=this@entry=0x7fff99e297c0, obj=obj@entry=0x7fff946757f8, context=..., 
    error=error@entry=0x7fff99e291b0) at /usr/src/debug/qt6-qtdeclarative-6.8.1-6.fc41.x86_64/src/qml/qml/qqmlpropertycachecreator_p.h:392
392             if (typeRef->isFullyDynamicType()) {


(gdb) print *obj
$3 = {inheritedTypeNameIndex = 88, idNameIndex = 0, id = -1, indexOfDefaultPropertyOrAlias = -1, defaultPropertyIsAlias = false, flags = 0, location = {m_data = {
      storage = {val = 37748971}}}, locationOfIdProperty = {m_data = {storage = {val = 0}}}, declarationsOverride = 0x0, functionsAndExpressions = 0x7fff94659cf8, 
  runtimeFunctionIndices = {data = 0x0, count = 0}, namedObjectsInComponent = {data = 0x0, count = 0}, properties = 0x7fff94659c68, aliases = 0x7fff94659c80, 
  qmlEnums = 0x7fff94659c98, qmlSignals = 0x7fff94659cb0, bindings = 0x7fff94659cc8, functions = 0x7fff94659ce0, inlineComponents = 0x7fff94659d10, 
  requiredPropertyExtraDatas = 0x7fff94659d28}

print objectContainer->stringAt(obj->inheritedTypeNameIndex)
$6 = {d = {d = 0x7fff9464dc40, ptr = 0x7fff9464dc50 u"QQC2.MenuSeparator", size = 18}, static _empty = 0 u'\000'}

*** Bug 501923 has been marked as a duplicate of this bug. ***

*** Bug 501717 has been marked as a duplicate of this bug. ***

I wonder if this is some sort of packaging mishap on Fedora somehow (despite this happening on Ubuntu and OpenSUSE too)?

Created attachment 179952 [details]
attachment-3293581-0.html

Problem was in my home directory. Cleared .cache and plasmashell stopped
crashing, but various plasma components had visual issues. Notably dolphin
and systemsettings. Restored .local from a known working date and
everything was back to normal.

On Wed, Apr 2, 2025 at 7:19 AM <bugzilla_noreply@kde.org> wrote:

> https://bugs.kde.org/show_bug.cgi?id=463648
>
> --- Comment #22 from staroy25786@nbss.nbed.nb.ca ---
> I wonder if this is some sort of packaging mishap on Fedora somehow
> (despite
> this happening on Ubuntu and OpenSUSE too)?
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.

*** Bug 502606 has been marked as a duplicate of this bug. ***

> | What      | Removed                 | Added                |
> |-----------|-------------------------|----------------------|
> | Component | general                 | Spam                 |
> | CC        |                         | klybymtb38@gmail.com |
> | Product   | kde                     | Spam                 |

I presume that this being refiled as spam is itself an act by a spammer?

Yes indeed; thanks for correcting it!

In the future please also report spammers' email addresses using a sysadmin ticket (https://phabricator.kde.org/maniphest/task/edit/form/2/) so their account can be deleted. I've done that this time.

(In reply to Nate Graham from comment #26)

> Yes indeed; thanks for correcting it!

...I hadn't yet, but I've at least set it as untriaged now, as it was beforehand.

I wasn't able to detect any spam on this bug aside from the vandalism of reassigning this to Spam.
The offending user account has now been blocked.

*** Bug 504034 has been marked as a duplicate of this bug. ***

Renaming .cache folder fixed the crashing for me (bug 504034).

Should I try to localize the affecting folder in the /.cache?

If you could, that would be very very helpful!

Created attachment 181232 [details]
cache file

Narrowed down to this file. Deleting it makes the crash go away.

BTW It is located in /home/xxxxxx/.cache/plasmashell/qmlcache/

Thank you! That's extremely valuable information.

Please copy the cache back into place and grab the output when starting plasmashell like so:

QT_LOGGING_RULES=qt.qml.diskcache*=true plasmashell --replace

the output of `kinfo` would also be good

(In reply to Harald Sitter from comment #35)
> Please copy the cache back into place and grab the output when starting
> plasmashell like so:
> 
> QT_LOGGING_RULES=qt.qml.diskcache*=true plasmashell --replace
> 
> the output of `kinfo` would also be good

Could you please make step-by-step guide? I'm just a normal user, not a coder. :)

1. Place back the cache file - OK
2. Log out from Plasma - OK
3. Log in to Plasma - OK
4. Then I immediately get a crash, but I have a terminal window open, so I can run commands.
5. run in terminal QT_LOGGING_RULES=qt.qml.diskcache*=true plasmashell --replace
6. Then I have to run plasmashell manually? By typing plasmashell command?
7. Then run kinfo?

1. OK, I got it myself :)

2. For some reason the cache file today was not affecting the system and there was no crash copying it back... :-/

3. But I test Linux with Tumbleweed, that has "Time Machine", so I can go back any time.

4. ~> QT_LOGGING_RULES=qt.qml.diskcache*=true plasmashell --replace
kf.plasma.quick: Applet preload policy set to 1
qt.qml.diskcache: Checksum mismatch for cached version of "file:///usr/share/plasma/plasmoids/org.kde.panel/contents/ui/main.qml"
KCrash: Attempting to start /usr/bin/plasmashell
KCrash: Application 'plasmashell' crashing... crashRecursionCounter = 2
Segmentation fault (core dumped)
kf.plasma.quick: Applet preload policy set to 1
qt.qml.diskcache: Checksum mismatch for cached version of "file:///usr/share/plasma/plasmoids/org.kde.panel/contents/ui/main.qml"
KCrash: Attempting to start /usr/bin/plasmashell
KCrash: Application 'plasmashell' crashing... crashRecursionCounter = 2
kf.plasma.quick: Applet preload policy set to 1
qt.qml.diskcache: Checksum mismatch for cached version of "file:///usr/share/plasma/plasmoids/org.kde.panel/contents/ui/main.qml"

And it attempts to start plasmashell forever...

~> kinfo
Operating System: openSUSE Tumbleweed 20250417
KDE Plasma Version: 6.3.80
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0
Kernel Version: 6.14.2-1-default (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5825U with Radeon Graphics
Memory: 16 GiB of RAM (14.5 GiB usable)
Graphics Processor: llvmpipe

5. I use the Icons + Text vertical panel, if that may help.

I can confirm the crash by installing tumbleweed, having bluetooth, and adjusting the timestamp of file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/Toolbar.qml to be the one in the cache file.

https://bugreports.qt.io/browse/QTBUG-136810

Thanks a ton for nailing that down, Harald!

Now fixed upstream in Qt 6.8.4 & 6.9.2, thanks to Ulf Hermann!

*** Bug 504933 has been marked as a duplicate of this bug. ***

*** Bug 505076 has been marked as a duplicate of this bug. ***