Incorrect unused LANGUAGE BangPatterns

[Ericson2314]

reflex-frp/reflex#382 and https://travis-ci.org/reflex-frp/reflex/jobs/634902715?utm_medium=notification&utm_source=github_status we have a wrong suggestion:

linting file src/Data/WeakBag.hs... /tmp/dist-test.jn5k/reflex-0.6.3/src/Data/WeakBag.hs:1:1: Warning: Unused LANGUAGE pragma

Found:

  {-# LANGUAGE BangPatterns #-}

Perhaps you should remove it.

1 hint

Bang patterns are used and removing them causes an build failure. 2.2.2 works, 2.2.6 doesn't, and I am in the process of testing other versions.

[Ericson2314]

2.2.5 works, it's a fresh regression.

[ndmitchell]

Thanks for reporting! The extension stuff got rewritten in 2.2.6, which will be the cause. It doesn't spot let !x = 1 in 1. I'm working on fixing, but it's somewhat subtle, so going to have to finish this off tonight.

[ndmitchell]

Thanks, fixed it. HLint 2.2.7 now out with the fix included.

[Ericson2314]

Thanks!