T7594.hs:37:12: error:
• Couldn't match type ‘b’ with ‘IO ()’
‘b’ is untouchable
inside the constraints: (:&:) c0 Real a
bound by a type expected by the context:
forall a. (:&:) c0 Real a => a -> b
at T7594.hs:37:8-19
‘b’ is a rigid type variable bound by
the inferred type of bar2 :: b
at T7594.hs:37:1-19
Possible fix: add a type signature for ‘bar2’
Expected type: a -> b
Actual type: a -> IO ()
• In the first argument of ‘app’, namely ‘print’
In the expression: app print q2
In an equation for ‘bar2’: bar2 = app print q2
• Relevant bindings include bar2 :: b (bound at T7594.hs:37:1)