Set content of a Text to string including Arabic characters, then set font to "Lucida Regular", the JVM crash.
On windows, it reports:
# C [javafx-font.dll+0x448d1] Java_com_sun_t2k_T2KFontFile_getGlyphBounds+0x7581

This is introduced from 8.0b65, and it's reproducible on Windows, Linux and MacOS. The problematic fonts are a little different on different platforms.