#13708: Panic! (the "impossible" happened) bug in GHC 8.2.1 rc2 -------------------------------------+------------------------------------- Reporter: deech | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1-rc2 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 deech): The problem is possibly being caused by some ghc options I'm using. I've created a self contained repo [1] that reproduces the bug on my machine when building with 'stack build'. It should work for 'cabal install' as well. [1] https://github.com/deech/821rc2-panic-bug -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13708#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler