Bug 433152

Summary: Segfault crash when closing file deleted externally
Product: [Applications] kate Reporter: Dan Dascalescu <ddascalescu+kde>
Component: applicationAssignee: KWrite Developers <kwrite-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: nate
Priority: NOR    
Version First Reported In: 20.12.2   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Backtrace
Couldn't load the debug symbols for libraries, to file the bug with the assistant

Description Dan Dascalescu 2021-02-18 10:59:09 UTC
Created attachment 135833 [details]
Backtrace

SUMMARY
Kate crashes when closing a file that was deleted externally. I went through the "Report bug" steps, but the wizard claimed the report was not useful, unless I installed the debugging symbols. It could only install the first debugging symbols bundle/library, and the other three failed with:

```
[] RESOLVED "kate;4:20.12.2-0xneon+20.04+focal+build15;amd64;installed:user_focal-focal-main" "kate-dbgsym;4:20.12.2-0xneon+20.04+focal+build15;amd64;installed:user_focal-focal-main" 1
[] FileResolver(0x5635761b0c60) ++ packages for "kate;4:20.12.2-0xneon+20.04+focal+build15;amd64;installed:user_focal-focal-main" "kate-dbgsym;4:20.12.2-0xneon+20.04+focal+build15;amd64;installed:user_focal-focal-main"
[] RESOLVED "" "" 2
[] RESOLVED "" "" 3
[] RESOLVED "" "" 4
[] candidates ("kate-dbgsym", "kate-dbg", "kate-dbg", "kate-dbgsym")
[] FileResolver(0x5635761b0c60) found "kate;4:20.12.2-0xneon+20.04+focal+build15;amd64;installed:user_focal-focal-main"
[] ("neon-repositories-ubuntu-ddebs")
[] "[repository::system/os/package/org.kde.neon.com.ubuntu.ddebs]> name: Ubuntu Debug Symbols | summary: Debug Symbols for Ubuntu | package: neon-repositories-ubuntu-ddebs"
[] ("org.kde.neon.com.ubuntu.ddebs") 1
[] files: ("/usr/bin/kate", "/lib/x86_64-linux-gnu/libKF5TextEditor.so.5", "/lib/x86_64-linux-gnu/libQt5Widgets.so.5", "/lib/x86_64-linux-gnu/libQt5Core.so.5")
```

Given that failure, I'm attaching the backtrace directly.

STEPS TO REPRODUCE
1. `echo 1 > bug.txt`
2. `kate bug.txt`
3. `rm bug.txt`
4. Switch to Kate, which should detect the file having been deleted
5. Click the "Close" button

OBSERVED RESULT
Kate crashes


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE neon 5.21
KDE Frameworks Version: 5.79.0
Qt Version: 5.15.2
Comment 1 Dan Dascalescu 2021-02-18 11:00:11 UTC
Created attachment 135834 [details]
Couldn't load the debug symbols for libraries, to file the bug with the assistant
Comment 2 Nate Graham 2021-02-19 21:54:42 UTC
Thread 1 (Thread 0x7f9c6e1a9d40 (LWP 53264)):
[KCrash Handler]
#4  0x00007f9c744e48ea in ?? () from /lib/x86_64-linux-gnu/libKF5TextEditor.so.5
#5  0x00007f9c74648460 in ?? () from /lib/x86_64-linux-gnu/libKF5TextEditor.so.5
#6  0x00007f9c746492dd in ?? () from /lib/x86_64-linux-gnu/libKF5TextEditor.so.5
#7  0x00007f9c728b86be in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5


Unfortunately this is not very useful without debug symbols. If the wizard didn't work, you'll need to install 'em manually using the `apt` package manager. The appropriate package is probably named something like "libKF5TextEditor-dbg"

Then after that's done you can reproduce the crash and attach a new backtrace. Thanks!
Comment 3 Dan Dascalescu 2021-02-20 06:11:22 UTC
I'm getting "libKF5TextEditor-dbg". Can you reproduce the bug?
Comment 4 Dan Dascalescu 2021-02-20 06:12:03 UTC
Sorry, I'm getting "E: Unable to locate package libKF5TextEditor-dbg"

(Konsole didn't copy when I pressed Ctrl+Insert, but that's another issue)
Comment 5 Bug Janitor Service 2021-03-07 04:33:26 UTC
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 6 Bug Janitor Service 2021-03-22 04:33:44 UTC
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!
Comment 7 Dan Dascalescu 2021-03-22 10:02:04 UTC
Looks like this was fixed. I can no longer reproduce, and I'm not sure what I meant at step 5, Click the "Close" button. There is no such button now, except for the 'x' button of the pop-up notifying of the file being deleted. Clicking that does nothing, and that's OK.