#15639: Surprising failure combining QuantifiedConstraints with Coercible -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler (Type | Version: 8.5 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): Best guess: the solver doesn't check for relevant quantified constraints before reducing `Yeah a_a11k[sk:1] ~R# Yeah b_a11l[sk:1]` to `a_a11k[sk:1] ~R# b_a11l[sk:1]`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15639#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler