<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi devs,<div class=""><br class=""></div><div class="">I see in CI that we're now linting the GHC source code. In order to avoid CI failure, I would like to lint locally, and I somehow know (though I forget where I learned it) that hadrian/build lint:compiler is the way to do this. After building hlint, I am able to do this. But the output is surprising; here is the tail:</div><div class=""><br class=""></div><div class=""><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(82, 48, 225); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"># hlint (for lint:compiler)</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/GHC/Tc/Utils/Unify.hs:2:1-36: Warning: Unused LANGUAGE pragma</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(34, 18, 106); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(244, 244, 244);"> </span><span class="" style="font-variant-ligatures: no-common-ligatures;">{-# LANGUAGE MultiWayIf #-}</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps you should remove it.</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage1/build/GHC/Parser.hs:6:1-29: Warning: Unused LANGUAGE pragma</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(34, 18, 106); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(244, 244, 244);"> </span><span class="" style="font-variant-ligatures: no-common-ligatures;">{-# LANGUAGE ViewPatterns #-}</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps you should remove it.</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage1/build/GHC/Parser.hs:8:1-27: Warning: Unused LANGUAGE pragma</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(34, 18, 106); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(244, 244, 244);"> </span><span class="" style="font-variant-ligatures: no-common-ligatures;">{-# LANGUAGE LambdaCase #-}</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps you should remove it.</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage1/build/GHC/Parser.hs:38:1-54: Warning: Use fewer imports</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> unless</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> liftM</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> when</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(<=<)</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">)</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> ap </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">)</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> unless</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> liftM</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> when</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(<=<),</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> ap </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">)</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage1/build/GHC/Parser.hs:43:1-18: Warning: Use fewer imports</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.Prelude</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.Prelude</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.Prelude</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage1/build/GHC/Cmm/Parser.hs:17:1-24: Warning: Use fewer imports</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.StgToCmm.Prof</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.StgToCmm.Prof</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.StgToCmm.Prof</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage1/build/GHC/Cmm/Parser.hs:71:1-20: Warning: Use fewer imports</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> ap </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">)</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage2/build/GHC/Parser.hs:6:1-29: Warning: Unused LANGUAGE pragma</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(34, 18, 106); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(244, 244, 244);"> </span><span class="" style="font-variant-ligatures: no-common-ligatures;">{-# LANGUAGE ViewPatterns #-}</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps you should remove it.</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage2/build/GHC/Parser.hs:8:1-27: Warning: Unused LANGUAGE pragma</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(34, 18, 106); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(244, 244, 244);"> </span><span class="" style="font-variant-ligatures: no-common-ligatures;">{-# LANGUAGE LambdaCase #-}</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps you should remove it.</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage2/build/GHC/Parser.hs:38:1-54: Warning: Use fewer imports</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> unless</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> liftM</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> when</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(<=<)</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">)</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> ap </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">)</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> unless</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> liftM</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> when</span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">,</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(<=<),</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> ap </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">)</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage2/build/GHC/Parser.hs:43:1-18: Warning: Use fewer imports</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.Prelude</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.Prelude</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.Prelude</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage2/build/GHC/Cmm/Parser.hs:17:1-24: Warning: Use fewer imports</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.StgToCmm.Prof</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.StgToCmm.Prof</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> GHC.StgToCmm.Prof</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">compiler/stage2/build/GHC/Cmm/Parser.hs:71:1-20: Warning: Use fewer imports</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Found:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">(</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> ap </span><span class="" style="font-variant-ligatures: no-common-ligatures; color: rgb(52, 187, 200);">)</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Perhaps:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><span class="" style="text-decoration: underline; font-variant-ligatures: no-common-ligatures; color: rgb(52, 188, 38);">import</span><span class="" style="font-variant-ligatures: no-common-ligatures;"> Control.Monad</span></div><div style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;" class=""><span class="" style="font-variant-ligatures: no-common-ligatures;"> </span><br class="webkit-block-placeholder"></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0); min-height: 11px;"><span class="" style="font-variant-ligatures: no-common-ligatures;"></span><br class=""></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(244, 244, 244); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">13 hints</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(195, 55, 32); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Error when running Shake build system:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(195, 55, 32); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> at want, called at src/Main.hs:104:30 in main:Main</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(195, 55, 32); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">* Depends on: lint:compiler</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(195, 55, 32); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;"> at cmd_, called at src/Rules/Lint.hs:70:3 in main:Rules.Lint</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(195, 55, 32); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">* Raised the exception:</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(195, 55, 32); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Development.Shake.cmd, system command failed</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(195, 55, 32); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Command line: hlint -j --cpp-define x86_64_HOST_ARCH --cpp-include=includes --cpp-include=_build/stage1/lib --cpp-include=compiler --cpp-include=_build/stage1/lib/ghcplatform.h --cpp-include=_build/stage1/compiler/build -h compiler/.hlint.yaml compiler</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(195, 55, 32); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Exit code: 1</span></div><div class="" style="margin: 0px; font-stretch: normal; font-size: 10px; line-height: normal; font-family: Menlo; color: rgb(195, 55, 32); background-color: rgb(0, 0, 0);"><span class="" style="font-variant-ligatures: no-common-ligatures;">Stderr:</span></div></div><div class=""><br class=""></div><div class="">There are several curiosities here:</div><div class=""><br class=""></div><div class="">* I introduced one of these errors, in GHC.Tc.Utils.Unify; the other errors are in files I have not modified. Will these affect CI?</div><div class="">* Hadrian crashes at the end. Is that expected? It says "system command failed" with a bunch of gobbledegook. Is this an error within Hadrian? Or is this just Hadrian's way of saying that it encountered an error when linting? If it's the latter, the current message is hard to read.</div><div class="">* As you may be able to see, I use a dark-background terminal window. The colors output by the hlint process are nigh impossible to read when describing redundant LANGUAGE pragmas. Are these colors configurable?</div><div class=""><br class=""></div><div class="">Thanks!</div><div class="">Richard</div></body></html>