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Created attachment 255665 [details] Screen shots to demonstrate bug To reproduce: Debug some C++ application. In the editor try to view the debug details of a variable by hovering over it. A window is shown that has some parts of it black. As is shown in the first attached screen shot. What is expected is to have visible text in the window. If you click afterwards several times on the visible text, then the rest of the window text becomes visible, as is show in the second screen shot.
To clarify some important details. This happened when I migrated from Luna to Mars. In Luna with CDT 8.6.0, I do not observe the problem. I am running Ubuntu 14.04 with Oracle's Java 8 runtime.
I can reproduce this as well. I'm using: - Xubuntu 14.04.3 LTS x86-64 - OpenJDK 7 - Eclipse IDE for C/C++ Developers, Version: Mars Release (4.5.0), Build id: 20150621-1200 During debugging when I hover over a variable the Expression / Type / Value pane of the tooltip is entirely black. Clicking on a "row" of that pane where the variable values should be causes the row to be highlighted and the variable values become visible. This works intermittently. If I start Eclipse with "env SWT_GTK3=0" the problem goes away as reported in the most recent comment by Philipp Heckel here https://bugs.eclipse.org/bugs/show_bug.cgi?id=309907
