#15562: `-XStrict -XNoStrict` is not neutral -------------------------------------+------------------------------------- Reporter: hvr | 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: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): comment:3 requires that enabling one extension never disables another. However, this is not true! `RebindableSyntax` implies `NoImplicitPrelude`. Accordingly, `ImplicitPrelude` and `RebindableSyntax` do not commute. And, earlier this summer, `TypeOperators` implied `NoStarIsType`. This feature was removed because it made for a bad migration story, not because it violated this principle. My vote would be simply not to make any guarantees of this sort. It's not hard for a tool to consult `DynFlags.impliedXFlags` and figure out what reorderings are OK. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15562#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler