HOW TO REPRODUCE:
Open TeXworks and write:
and then choose LuaLaTeX as engine, and then press the compiling button. Compilation never finishes and it is stuck at the following console output:
luaotfload | db : Font names database not found, generating new one.
luaotfload | db : This can take several minutes; please be patient.
At least waiting for 30 minutes does not finish it.
MiKTeX-pdfTeX 2.9.4902 (1.40.14) (MiKTeX 2.9 64-bit)
Copyright (C) 1982 D. E. Knuth, (C) 1996-2012 Han The Thanh
Windows 8.1 64-bit