This program

print(fget(1,3))
fset(1,3,false)
print(fget(1,3))

returns this output:
>false
>true

Simply put, fset sets bits to true and never false. Am I horribly misunderstanding the fset function, or is it a bug? -_-

Yep, seems broken to me! Does not do what the docs say.

fset(1,0) does work however, so you can compute the value witht the bit unset using band and bnot

Fixed for 0.1.9, thanks!