Ugly solution to the "we proved T that is equivalent to T" problem:

Ugly solution to the "we proved T that is equivalent to T" problem:
we use pack_coercion (defined into cicRefine) inside doubleTypeInference
(that is well below in the module hierarchy :-(

This is also supposed to be quite expensive (since pack_coercion uses
the refiner and coercion packing is applied to every expected/synthesized
type).