#12158: ghc: panic! (the 'impossible' happened) translateConPatVec: lookup -------------------------------------+------------------------------------- Reporter: wozgonon | Owner: gkaracha Type: bug | Status: closed Priority: high | Milestone: 8.4.2 Component: GHCi | Version: 8.0.1 Resolution: duplicate | Keywords: | PatternMatchWarnings Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash | Test Case: Blocked By: | Blocking: Related Tickets: #13644 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by philderbeast): I tried verifying this in place by updating stack to use [[https://gist.github.com/DanBurton/ba6fcf6b54491436fe8c98d2b2dc702b|ghc-8.4.1-alpha2]]. I set `allow-newer: true` and then hit problems with libraries that I worked through by adding specific packages references until I hit `refex- tdfa` that doesn't compile with this version of ghc. {{{ - location: git: https://github.com/haskell/primitive.git commit: 53f72ce69a4dfde5345cf5809a8b4a1993523367 extra-dep: true - location: git: https://github.com/haskell/text.git commit: 9fac5db9b048b7d68fa2fb68513ba86c791b3630 extra-dep: true - location: git: https://github.com/ChrisKuklewicz/regex-tdfa commit: f1b671946ee573f86d72484f3ab56487d456e735 }}} I think it may be better to try to get a minimal test case going with fewer dependencies. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12158#comment:16 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler