Ben Gamari authored Dec 16, 2015 and Ben Gamari committed Dec 17, 2015

Previously the Typeable implementation would intentionally create TyCon
representations with bogus fingerprints to avoid fingerprints (which may
change often) from leaking into test output. As pointed out by Richard
in #10376 this is very bad as simply enabling a debug flag,
`-dsuppress-uniques`, completely breaks the soundness of `Typeable`!

This patch removes this behavior and replaces it with logic in the
testsuite driver to filter out spurious changes due to Typeable
representations.

Test Plan: Validate

Reviewers: austin, simonpj, goldfire

Reviewed By: goldfire

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D1629

GHC Trac Issues: #10376