Error found:
in module Main
at tests/purs/failing/CoercibleNonCanonical1.purs:11:27 - 11:33 (line 11, column 27 - line 11, column 33)

  No type class instance was found for
                                    
    Prim.Coerce.Coercible a0        
                          (D (N a0))
                                    

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

where a0 is a rigid type variable
        bound at (line 11, column 27 - line 11, column 33)

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