Line numbers garbled on Wayland

[tfonda-fbk]

Describe the bug
Line numbers in the Eclipse Java IDE often glitch on GNU/Linux systems using Wayland.

To Reproduce

1. Open the Eclipse Java IDE in a Wayland session on a GNU/Linux system
2. Open a Java source file
3. Start typing and scrolling up and down. At some point the line numbers will display repeated/incomplete characters, or plain wrong numbers

Expected behavior
Line numbers should always look fine.

Screenshots

Environment:

1. Select the platform(s) on which the behavior is seen:

• • Windows
• • Linux
• • macOS

2. Additional OS info (e.g. OS version, Linux Desktop, etc)
   OpenSUSE Tumbleweed, KDE Plasma Wayland session. According to the older related bug reports linked below, the issue can be observed on any GNU/Linux distro (in a Wayland session).

3. JRE/JDK version
   21

Version since
Eclipse 2024-06

Workaround (or) Additional context
Originally discussed here and here.

[torokati44]

+1

[HeikoKlare]

As a hint for working on this (and understanding the cause):

The issue was adressed and temporarily fixed by:

• [GTK] Fix GC#copyArea() for overlapping source and target areas #1756 #1757

But the change had to be partially reverted:

• [GTK] Revert unification of blank Image initialization #1891 #1893