ListT.scanl broken?

[DanielGronau]

I didn't try it out, just "translated" it, but it looks like line 218 in https://github.com/purescript/purescript-transformers/blob/v1.0.0/src/Control/Monad/List/Trans.purs should read

h (Yield a s) = let b'' = f b' a in Just $ Tuple (Tuple b'' (force s)) b''

Note the use of b' instead of b, which make IMHO no sense in this context.

[paf31]

Yes, this definitely looks incorrect.