Bug 500996

Summary:	Qt6Gui.dll not found
Product:	[Applications] kdiff3	Reporter:	Jan Klass <jan.klass>
Component:	application	Assignee:	michael <reeves.87>
Status:	RESOLVED WORKSFORME
Severity:	crash	CC:	compel_kelp759
Priority:	NOR
Version First Reported In:	1.12.1
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	screenshot

Description Jan Klass 2025-03-03 09:54:50 UTC

Created attachment 179064 [details]
screenshot

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SUMMARY


STEPS TO REPRODUCE
1. Install KDiff3 1.12.1 on Windows
2. Launch

OBSERVED RESULT
Error entry point `""` not found in Qt6Gui.dll

EXPECTED RESULT
KDiff3 launches

SOFTWARE/OS VERSIONS
Windows: Windows 10 Business, 22H2
Qt Version: ?

ADDITIONAL INFORMATION
I see 1.12.1 is not on the website yet, but a tag exists in the source repo, and the winget package manifest has been updated with the installer URL https://github.com/microsoft/winget-pkgs/tree/master/manifests/k/KDE/KDiff3/1.12.1
I used the installer referenced there https://download.kde.org/stable/kdiff3/kdiff3-1.12.1-windows-x86_64.exe / https://fr2.rpmfind.net/linux/KDE/stable/kdiff3/kdiff3-1.12.1-windows-x86_64.exe

When I install 1.12.0 kdiff3-1.12.0-windows-cl.exe it launches and works fine.

Comment 1 hideaki 2025-03-21 17:03:57 UTC

I have the same issue with my environment.

I installed kdiff3-1.12.1-windows-x86_64-sideload.appx, and it is working fine, but I prefer winget to install kdiff3, also obviously non-sideloaded kdiff3-1.12.1-windows-x86_64.exe is smaller.

Comment 2 michael 2025-03-21 17:57:45 UTC

Out of curiosity does upgrading to 1.12.1 work as expected I ask this because it sounds a packaging error going push 1.12.2 as 1.12.1 has a merge bug that prevents actually saving if there is an encoding error. For UTF-* you likely won't trigger trigger this as these codecs have a built-in replacement character defined so they don't flag an error for encoding issues.

Comment 3 michael 2025-03-22 14:30:54 UTC

Tarballs for 1.12.2 uploaded https://phabricator.kde.org/T17977

Comment 4 hideaki 2025-03-23 13:56:51 UTC

(In reply to michael from comment #2)
> Out of curiosity does upgrading to 1.12.1 work as expected I ask this
> because it sounds a packaging error going push 1.12.2 as 1.12.1 has a merge
> bug that prevents actually saving if there is an encoding error. For UTF-*
> you likely won't trigger trigger this as these codecs have a built-in
> replacement character defined so they don't flag an error for encoding
> issues.

I had no problem when I installed 1.12.1. note that it was "Just for me" installation.

I uninstall and install 1.12.1 again, now it works.

one thing I noticed is the installation path. in my setup, I had "%LOCALAPPDATA%\KDiff3\bin" instead of "%LOCALAPPDATA%\Programs\KDiff3\bin" in %PATH%.
I don't remember, but probably an old installer used %LOCALAPPDATA%\KDiff3 as the defualt folder for "Just for me", and recent ones use "%LOCALAPPDATA%\Programs\KDiff3\bin".

Comment 5 michael 2025-04-03 17:10:38 UTC

Looks like the path change is the reason the kdiff3 installer uses the default install path supplied by underling tooling. Unfortunately that means it can change unexpectedly. This sometimes confuses windows after an upgrade.