#16261: [] interpreted as an overloaded list in rule LHS -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.10.1 Component: Compiler | Version: 8.6.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple error/warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): Replying to [comment:10 simonpj]:
Yes, that's it. But the module doesn't even enable OverloadedLists.
That is indeed odd. Digging into why would be v helpful.
I don't know anything about the implementation of the `RULES` system. What determines which extensions are in play in `RULES`? Do you agree with my opinion that `OverloadedLists` should ''never'' be enabled in a rule LHS, regardless of which extensions are enabled in the module? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16261#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler