Internal compiler error

[nqpz]

Trying to compile this program with futhark from git

def compose2 = ((>->) (<-<) <-<) (>->)

entry main = compose2 (+) (* 2i32)

gives me this error:

Application of an expression
f
that is neither a static lambda nor a dynamic function, but has static value:
Dynamic (Scalar (Arrow (fromList []) Unnamed (Scalar (Prim (Signed Int32))) (RetType {retDims = [], retType = Scalar (Arrow (fromList []) Unnamed (Scalar (Prim (Signed Int32))) (RetType {retDims = [], retType = Scalar (Prim (Signed Int32))}))})))
CallStack (from HasCallStack):
  error, called at src/Futhark/Internalise/Defunctionalise.hs:947:7 in futhark-0.23.0-inplace:Futhark.Internalise.Defunctionalise

[athas]

Guessing a shadowing bug inside defunctionalisation.