/usr/share/lua/5.2/lpeg_patterns/language.lua is in lua-lpeg-patterns 0.4-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/lua/5.2/lpeg_patterns/../../5.1/lpeg_patterns/language.lua
/usr/share/lua/5.2/lpeg_patterns/../../5.1/lpeg_patterns/language.lua