Error found:
in module Main
at tests/purs/failing/CoercibleConstrained1.purs:11:28 - 11:34 (line 11, column 28 - line 11, column 34)

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

while solving type class constraint
                                        
  Prim.Coerce.Coercible (Constrained a0)
                        (Constrained b1)
                                        
while checking that type forall (a :: Type) (b :: Type). Coercible @Type a b => a -> b
  is at least as general as type Constrained a0 -> Constrained b1
while checking that expression coerce
  has type Constrained a0 -> Constrained b1
in value declaration constrainedToConstrained

where a0 is a rigid type variable
        bound at (line 11, column 28 - line 11, column 34)
      b1 is a rigid type variable
        bound at (line 11, column 28 - line 11, column 34)

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