#15586: Compilation panic! (the 'impossible' happened) -------------------------------------+------------------------------------- Reporter: subaruru | 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: #15499 | Differential Rev(s): Phab:D5118 Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * os: Linux => Unknown/Multiple * architecture: x86_64 (amd64) => Unknown/Multiple * related: => #15499 Comment: For the sake of historical curiosity: this was caused by the same bug that triggered #15499, as it requires a record update on a data constructor where an existential type variable comes before a universal one. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15586#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler