Latest   versions has a scrolling bug with GTK3.  When you scroll code editor horizontally a rectangle shaped appears over code.  To solve this annoying bug,

you should export SWT_GTK3=0 variable on terminal you started Eclipse.  And if you are using a desktop launcher like me, edit its properties.

command should like

/home/username/eclipse/eclipse

change it like below

sh -c “export SWT_GTK3=0; /home/username/eclipse/eclipse”

 

and vala…