#5612: panic, impossible happened, "Exotic form of kind" -------------------------------------------+-------------------------------- Reporter: guest | Owner: dreixel Type: bug | Status: new Priority: normal | Milestone: 7.4.1 Component: Compiler | Version: 7.3 Keywords: PolyKinds, TemplateHaskell | Os: Linux Architecture: x86 | Failure: Other Difficulty: | Testcase: Blockedby: | Blocking: Related: | -------------------------------------------+-------------------------------- Changes (by lunaris):
* keywords: => PolyKinds, TemplateHaskell * version: 7.0.3 => 7.3 Comment: I can reproduce what appears to be the same bug with the following: First.hs: {{{ {-# LANGUAGE PolyKinds #-} module First where data Proxy (as :: [*]) = Proxy f :: Proxy as -> () f _ = () }}} Second.hs: {{{ module Second where import First import Language.Haskell.TH }}} GHCI session: {{{ % ghci -XTemplateHaskell Second.hs GHCi, version 7.3.20111204: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. [1 of 2] Compiling First ( First.hs, interpreted ) [2 of 2] Compiling Second ( Second.hs, interpreted ) Ok, modules loaded: Second, First. *Second> $(reify 'f >>= stringE . show) Loading package array-0.3.0.3 ... linking ... done. Loading package deepseq-1.2.0.1 ... linking ... done. Loading package containers-0.4.2.0 ... linking ... done. Loading package pretty-1.1.0.0 ... linking ... done. Loading package template-haskell ... linking ... done. <interactive>:2:3: Exception when trying to run compile-time code: <interactive>: panic! (the 'impossible' happened) (GHC version 7.3.20111204 for x86_64-unknown-linux): Exotic form of kind [ghc-prim:GHC.Prim.*{(w) tc 34d}] Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug Code: (>>=) reify 'f (.) stringE show In the expression: $(reify 'f >>= stringE . show) In an equation for `it': it = $(reify 'f >>= stringE . show) }}} As far as I can tell, there aren't any TH constructors for promoted kinds yet, so reifyKind in TcSplice can't do anything better. -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5612#comment:3> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs