Error found:
in module Main
at tests/purs/failing/CoercibleNonCanonical2.purs:10:27 - 10:33 (line 10, column 27 - line 10, column 33)

  No type class instance was found for
                            
    Prim.Coerce.Coercible a0
                          b1
                            

while checking that type forall (a :: Type) (b :: Type). Coercible @Type a b => a -> b
  is at least as general as type a0 -> b1
while checking that expression coerce
  has type a0 -> b1
in value declaration nonCanonicalDiffTyVarEq

where a0 is a rigid type variable
        bound at (line 10, column 27 - line 10, column 33)
      b1 is a rigid type variable
        bound at (line 10, column 27 - line 10, column 33)

See https://github.com/purescript/documentation/blob/master/errors/NoInstanceFound.md for more information,
or to contribute content related to this error.