#12727: ghc: panic! (the 'impossible' happened) - piResultTy -------------------------------------+------------------------------------- Reporter: ocharles | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.2-rc1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by ocharles): We've had a few more panics today, each different: {{{ [248 of 278] Compiling Handler.Auth ( src/Handler/Auth.hs, dist/build/Handler/Auth.o ) ghc: panic! (the 'impossible' happened) (GHC version 8.0.1.20161117 for x86_64-unknown-linux): Iface Lint failure In interface for Data.ByteString.Internal Unfolding of $fShowByteString_$cshow <no location info>: warning: In the expression: $trModule2 (unpackChars x_apbxX) (: @ Char shows6 ([] @ Char)) Non-function type in function position Fun type: TrName Arg type: [Char] Arg: unpackChars x_apbxX $fShowByteString_$cshow = \ (x_apbxX :: ByteString) -> : @ Char shows6 ($trModule2 (unpackChars x_apbxX) (: @ Char shows6 ([] @ Char))) Iface expr = \ (x :: ByteString) -> : @ Char shows6 (showLitString (unpackChars x) (: @ Char shows6 ([] @ Char))) }}} and {{{ [215 of 278] Compiling Foundation ( Foundation.hs, dist/build/Foundation.o ) ghc: panic! (the 'impossible' happened) (GHC version 8.0.1.20161117 for x86_64-unknown-linux): tyThingTyCon Identifier ‘$fEnumIsolationLevel’ }}} I'll continue to see if I can get any sort of repro on this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12727#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler