#13740: GHC panic with operator constructor of newtype -------------------------------------+------------------------------------- Reporter: codebje | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.0.2 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: 13741 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by codebje): * related: => 13741 Comment: Duplicated in https://ghc.haskell.org/trac/ghc/ticket/13741#ticket. The issue is not triggered if precedence and fixity are assigned: {{{ infixl 5 >>- -- any precedence and fixity works newtype Cont r a = Cont { (>>-) :: (a -> r) -> r } x = \a b c -> c >>- a . b }}} Other infix operators in place of `.` don't seem to cause the same problem, but that's not an exhaustive check! -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13740#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler