#7778: kindFunResult panic with => inside a constraint ----------------------------------------+----------------------------------- Reporter: monoidal | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: 7.8.1 Component: Compiler (Type checker) | Version: 7.6.2 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ----------------------------------------+----------------------------------- Comment(by simonpj@…): commit d3149f6096a987e94d4989e537c1a133bcbb9a6f {{{ Author: Simon Peyton Jones <simonpj@microsoft.com> Date: Mon Apr 29 17:26:17 2013 +0100 Tighten up on the kind checking for foralls In particular, (forall a. Num a => ...) always has kind *, becuase the "=>" really is a function. It turned out that this was at the bottom of the crash in Trac #7778, which is now fixed compiler/typecheck/TcHsType.lhs | 31 ++++++++++++++++++++++++------- compiler/typecheck/TcValidity.lhs | 16 +++++++++------- 2 files changed, 33 insertions(+), 14 deletions(-) }}} -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7778#comment:3> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler