#13646: strict patterns with no bindings (e.g. `let !() = ...`) trigger -Wunused- pattern-binds -------------------------------------+------------------------------------- Reporter: exphp | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.2 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 exphp): I am conflicted on dfeuer's suggestion, since functions too can be bottom: {{{#!hs bottomsUp :: a -> a bottomsUp = error "oops" ... let !_ = bottomsUp -- error: Lib: oops }}} So generating warnings on this would be a somewhat opinionated change. Yet at the same time, it is an opinion I perhaps agree with; such code is playing with fire! -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13646#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler