#13185: haskell-relational-query: ghc: panic! (the 'impossible' happened) -------------------------------------+------------------------------------- Reporter: LocutusOfBorg | Owner: (none) Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 8.0.2 Resolution: | Keywords: Operating System: Linux | Architecture: | Unknown/Multiple Type of failure: Compile-time | Test Case: build crash or panic | relational-query with ghc 8.0.2 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): Here's a weird thing (possibly a separate bug?): if I `cabal clean; cabal configure --with-ghc=...; cabal build`, I get the failure. If I then `cabal build` again without cleaning, it works. Reid thinks this has something to do with a bug causing different info to pass from phase to phase through `.hi` files than otherwise; I haven't yet checked if it's been fixed. I'm currently bisecting this panic, and have narrowed it down to somewhere between d5518f72f3033ceaadc9b56a5d9012425b3a8956 and the 8.0.2 release. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13185#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler