#13333: Typeable regression in GHC HEAD -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: bgamari Type: bug | Status: new Priority: high | Milestone: 8.2.1 Component: Compiler (Type | Version: 8.1 checker) | Resolution: | Keywords: typeable Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3424 Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj):
The end result is that c2 = c1. And then, when c2 gets put in the inert set, its kind still mentions unzonked variables. (Even though the associated ctPred is just fine.)
I don't see the problem. See `Note [Ct/evidence invariant]` in `TcRnTypes`. The types in evidence terms are no zonked, and that should not matter one whit. Can you explain more precisely what actually goes wrong and why? Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13333#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler