I tried vainly to reinstall my IDE but still the same problem.
I've the same problem. In my case the issue was provocated by fonts. I've installed on windows "Segoe UI" (a google font). I don't konw why but this font was becomed the system default font. To fix the issue: In eclipse I've changed manually the font with old one "Segoe UI Symbol" (Windows > Preferences > General > Appearance > Colors and Font > View and Editor Folders > Part title font) Edit... and change font.