[GHC] #13646: strict patterns with no bindings (e.g. `let !() = ...`) trigger -Wunused-pattern-binds

[Ben Gamari]

GHC <ghc-devs at haskell.org> writes:

> #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 simonpj):
>
>  Yes I see the point.  Perhaps we should suppress this warning if the
>  pattern has an outmost bang.
>
>  Does anyone object?

Sounds reasonable to me.
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