Bug 486766 - Gtk-WARNING **: GtkGizmo 0x6127b629ff10 (slider) reported min height -2, but sizes must be >= 0
Summary: Gtk-WARNING **: GtkGizmo 0x6127b629ff10 (slider) reported min height -2, but ...
Status: REPORTED
Alias: None
Product: Breeze
Classification: Plasma
Component: gtk theme (other bugs)
Version First Reported In: 6.0.2
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-05-08 06:58 UTC by Benjamin Hennion
Modified: 2024-05-08 18:22 UTC (History)
3 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:

Attachments
UI file with Scrollbar (274 bytes, application/x-designer)
2024-05-08 06:58 UTC, Benjamin Hennion 		Details
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Description Benjamin Hennion 2024-05-08 06:58:21 UTC 
Created attachment 169293 [details]
UI file with Scrollbar

SUMMARY
Whenever a GtkScrollbar is displayed, the terminal outputs:

> Gtk-WARNING **: 08:38:04.284: GtkGizmo 0x6127b629ff10 (slider) reported min height -2, but sizes must be >= 0

This does not happen with GTK_THEME=adwaita, so it is most likely a breeze-gtk issue.
See also https://gitlab.gnome.org/GNOME/gtk/-/issues/4446 which suggests such issues are CSS-related.

STEPS TO REPRODUCE
1. Download the attached gizmo.ui. It contains a GtkWindow with a GtkScrollbar. 
2. Open it via `gtk4-builder-tool preview gizmo.ui` (with breeze as gtk theme in KCM)
3. See the warnings in the terminal output.
4. Try again with `GTK_THEME=adwaita gtk4-builder-tool preview gizmo.ui`. No warnings.

OBSERVED RESULT
> Gtk-WARNING **: 08:38:04.284: GtkGizmo 0x6127b629ff10 (slider) reported min height -2, but sizes must be >= 0

EXPECTED RESULT
No warning