#8644: 'Untouchable' error with constraint variable in rank-2 type ----------------------------------------------+---------------------------- Reporter: sbarclay | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type checker) | Version: 7.7 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects valid program | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: ----------------------------------------------+---------------------------- Comment (by Simon Peyton Jones <simonpj@…>): In [changeset:"cf68a8e798fea44bea2804439732e534e096b0d1/testsuite"]: {{{ #!CommitTicketReference repository="testsuite" revision="cf68a8e798fea44bea2804439732e534e096b0d1" Update T7594 as a result of fixing #8644 The fix to #8644 makes the original T7594 pass (rightly). I've added a variant that shouuld and does fail }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8644#comment:3> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler