#14449: Type variables allowed to unify in a partial type signature (PartialTypeSignatures) -------------------------------------+------------------------------------- Reporter: kcsongor | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.2.1 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC accepts | Unknown/Multiple invalid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones <simonpj@…>): In [changeset:"4efe5fed407067d4b27000e0cf4092cfb6f7502b/ghc" 4efe5fed/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="4efe5fed407067d4b27000e0cf4092cfb6f7502b" Check quantification for partial type signatues Trac #14449 showed that we were failing to check that the quantified type variables of a partial type signature remained distinct. See Note [Quantified variables in partial type signatures] in TcBinds. A little refactoring along the way. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14449#comment:2> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler