Bug 170406 - Thumbnails for protected documents are rendered with artifacts
Summary: Thumbnails for protected documents are rendered with artifacts
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: LibreOffice (show other bugs)
Version:
(earliest affected)
26.2.0.0 alpha0+ master
Hardware: All Windows (All)
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords: bibisectRequest, regression
Depends on:
Blocks: Start-Center
  Show dependency treegraph
 
Reported: 2026-01-20 19:51 UTC by David García
Modified: 2026-01-23 05:06 UTC (History)
1 user (show)

See Also:
Crash report or crash signature:


Attachments
Three screenshots (96.08 KB, application/x-zip-compressed)
2026-01-20 19:51 UTC, David García
Details

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Description David García 2026-01-20 19:51:06 UTC
Description:
On the recent documents section, thumbnails for documents protected with a password are rendered with artifacts:

1. These artifacts take a particular form and, just by closing LibreOffice and opening it again, they take another form.

2. If you have, on the list, a document not protected by a password, you can find traces of the thumbnail for this document on the thumbnails for other documents.

3. Though in LO 26.2.0.2, these artifacts may cover part of the thumbnail, in LO 26.2.0.1 (where I first noticed the issue), these artifacts covered the whole thumbnail. I can't provide a proper screenshot for LO 26.2.0.1, as thumbnails now look the same as in LO 26.2.0.2.

Steps to Reproduce:
Just open LibreOffice and look at the recent documents section.

Actual Results:
Thumbnails for protected documents have artifacts.

Expected Results:
Thumbnails for protected documents should just have a solid colour.


Reproducible: Always


User Profile Reset: No

Additional Info:
Version: 26.2.0.2 (X86_64)
Build ID: 620(Build:2)
CPU threads: 16; OS: Windows 11 X86_64 (build 26200); UI render: Skia/Raster; VCL: win
Locale: es-ES (es_ES); UI: es-ES
Calc: CL threaded
Comment 1 David García 2026-01-20 19:51:40 UTC
Created attachment 205106 [details]
Three screenshots

Three screenshots
Comment 2 David García 2026-01-20 19:57:34 UTC
One correction: thumbnails for protected documents have always consisted on an icon on a transparent background.
Comment 3 Volodymyr 2026-01-20 21:39:45 UTC
I can confirm this issue in the alpha version.
On my environment, thumbnails for password-protected documents in the Recent Documents section show visual artifacts or remnants of document content instead of a plain generic icon.

This issue reproduces in LibreOffice 26.8.0.0 alpha, while it does not reproduce in the stable version 25.8.4.2.

My environment: Windows 11 Pro (64-bit), 23H2 UI rendering: Skia/Raster (Skia Backend: GaneshGL) Locale: de-AT / de-DE
Comment 4 Volodymyr 2026-01-22 23:18:05 UTC
Bisected the issue with thumbnails of password-protected documents in Start Center → Recent Documents.

This regression appears to have begun at the following commit.
Adding Cc: to the author for visibility.
 928f0beedaa39b975765565ef61bd201a8c0bf7d is the first bad commit
commit 928f0beedaa39b975765565ef61bd201a8c0bf7d
Author: Jenkins Build User <tdf@tb102-2>
Date:   Tue Jan 20 04:49:32 2026 +0100

    source sha: bed0edbc11d5aaeaaf1a5f4b80f791e728bc55b8

    tdf#90993 Fix anchored objects disappear
Comment 5 Saburo 2026-01-23 03:08:53 UTC
I think this commit 07fd24a4bddddc2d0b0484d39b68a81fdca3c610.
possible skia issue.
Can anyone reproduce this on a Mac?