#15517: haddock triggers panic in trimJoinCont -------------------------------------+------------------------------------- Reporter: sjakobi | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Description changed by sjakobi: Old description:
Running haddock on the [https://github.com/VictorCMiraldo/generics-mrsop `generics-mrsop`] package results in
{{{ haddock: panic! (the 'impossible' happened) (GHC version 8.4.3 for x86_64-unknown-linux): completeCall
fail_av9P Select nodup wild_00 Stop[BoringCtxt] Rep Singl (El FamRoseInt) (Lkup ix CodesRoseInt) Call stack: CallStack (from HasCallStack): callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable pprPanic, called at compiler/simplCore/Simplify.hs:1533:9 in ghc:Simplify }}}
The same problem affects 8.6.1 and HEAD, but not 8.2.2.
The panic seems to stem from [https://github.com/ghc/ghc/blob/64c71ce956af3af593a46ef0d615c7f6fe6ecece/com... this catch-all in `trimeJoinCont`].
New description: Running haddock on the [https://github.com/VictorCMiraldo/generics-mrsop `generics-mrsop`] package results in {{{ haddock: panic! (the 'impossible' happened) (GHC version 8.4.3 for x86_64-unknown-linux): completeCall fail_av9P Select nodup wild_00 Stop[BoringCtxt] Rep Singl (El FamRoseInt) (Lkup ix CodesRoseInt) Call stack: CallStack (from HasCallStack): callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable pprPanic, called at compiler/simplCore/Simplify.hs:1533:9 in ghc:Simplify }}} The same problem affects 8.6.1 and HEAD, but not 8.2.2. The panic seems to stem from [https://github.com/ghc/ghc/blob/64c71ce956af3af593a46ef0d615c7f6fe6ecece/com... this catch-all in `trimJoinCont`]. -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15517#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler