Deleting a file from a .zip archive corrupts the archive

[zieren]

Version

Double Commander
Version: 1.1.29 gamma
Revision: 800
Commit: b4b2d9a
Build: 2025/10/12
Lazarus: 3.8.0.0
Free Pascal: 3.2.2
Platform: x86_64-Linux-qt5
System: Fedora release 42 (Adams)
Desktop Environment: GNOME (wayland)
Widgetset library: Qt 5.15.17

Description

I have a 7GB .zip file downloaded from Google Takeout (this service lets you download all your data in one place). When I delete a 5GB file inside that archive, the resulting archive is corrupt.

I haven't been able to reproduce this with other .zip files. Using zip -d on the same file does work, though it reports a warning for each file:

zip warning: Local Version Needed To Extract does not match CD: Takeout/Google Chat/Groups/foobar.jpg

To reproduce, I don't have a better way than to use a Google account, upload a 5GB file to Google Drive, and then use Takeout.

IMHO the problem is less that this happens for Google Takeout, but that it can happen at all.

[alexx2000]

This archive is valid, but strange and not optimal. It confused Zip-plugin. Fixed.

[zieren]

Thanks for fixing this so quickly!