#14907: Error message: (%,%) shows up when with accidental paren -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.5 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Poor/confusing | Unknown/Multiple error message | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): An even simpler example: {{{#!hs class (A, B) }}} {{{ $ /opt/ghc/8.2.2/bin/ghc Bug.hs [1 of 1] Compiling Main ( Bug.hs, Bug.o ) Bug.hs:1:8: error: Unexpected type ‘A’ In the class declaration for ‘GHC.Classes.(%,%)’ A class declaration should have form class GHC.Classes.(%,%) a b where ... | 1 | class (A, B) | ^ }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14907#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler