I got attempt to get length of local 'buf' (a nil value)

[ankurupadhyay123]

/usr/local/share/lua/5.1/vstruct/io/u.lua:15: attempt to get length of local 'buf' (a nil value)
i solved this by adding a nil check of size in c.lua file in this (function c.read(fd, _, size))

[ToxicFrog]

Can you post the code that produces this error?