Bug 498885

Summary:	Klevernotes crashes with empty code block section
Product:	[Applications] KleverNotes	Reporter:	Félim Whiteley <felim>
Component:	Markdown parser	Assignee:	Louis Schul <schul9louis>
Status:	RESOLVED FIXED
Severity:	crash	CC:	mdavidsaver
Priority:	NOR
Version First Reported In:	1.1.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Félim Whiteley 2025-01-19 15:16:51 UTC

SUMMARY
Application crashes if you create a backtick code area but don't yet paste in or type what you want. As soon as you insert the first of the three backticks for the closing excape it crashes with

klevernotes: ./src/logic/parser/md4qt/poscache.h:139: void MD::PosCache<Trait>::insertInCache(const MD::details::PosRange<Trait>&, bool) [with Trait = MD::QStringTrait]: Assertion `item.isValidPos()' failed.
Aborted (core dumped)

STEPS TO REPRODUCE
1.  Create a new Note
2.  add 3 backticks, poress enter twice to leave a blank line
3.  On the second blank line start your closing backticks. App will crash out losing the note changes.

OBSERVED RESULT
Crash

EXPECTED RESULT
Leave a empty code area where afterwards you can paste in the code block you wanted.

SOFTWARE/OS VERSIONS
Operating System: KDE neon 6.2
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.1
Kernel Version: 6.8.0-51-generic (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor
Memory: 62.7 GiB of RAM
Graphics Processor: AMD Radeon RX 580 Series

ADDITIONAL INFORMATION
Package: klevernotes
Version: 1.1.0-0zneon+24.04+noble+release+build4

Comment 1 Louis Schul 2025-01-20 09:02:17 UTC

Thanks for this report.
I can confirm this bug in `V1.1`. However, this seems to be fixed on master and will come with the next release.

Comment 2 mdavidsaver 2025-11-23 18:51:18 UTC

I encountered a crash like the one described with klevernotes 1.2.2 (packaged with Debian 13).  Same scenario, new note, start a backtick block, then a crash.  I have not been able to reproduce, so I do not have a crash dump or console log.

Comment 3 Louis Schul 2025-11-23 19:02:48 UTC

(In reply to mdavidsaver from comment #2)
> I encountered a crash like the one described with klevernotes 1.2.2
> (packaged with Debian 13).  Same scenario, new note, start a backtick block,
> then a crash.  I have not been able to reproduce, so I do not have a crash
> dump or console log.

This bug could still be in 1.2.2. 
However, KleverNotes is currently in 1.2.5, I'm pretty sure that the bug has been fixed. 
At least, I have not encountered it since then. 
There's not much I can do here, sorte.