stage2 build fails
Simon Peyton Jones
simonpj at microsoft.com
Mon Jan 27 11:42:20 UTC 2020
It would be good to know how to fix this. It's blocking my builds.
For some reason it doesn't seem to kill CI
From: Simon Peyton Jones
Sent: 25 January 2020 20:26
To: ghc-devs <ghc-devs at haskell.org>
Subject: stage2 build fails
I'm getting this with "sh validate -legacy"
compiler/main/DynFlags.hs:1344:15: error: [-Woverlapping-patterns, -Werror=overlapping-patterns]
Pattern match is redundant
In an equation for 'settings': settings s | otherwise = ...
1344 | | otherwise = panic $ "Invalid cfg parameters." ++ exampleString
This is when compiling the stage-2 compiler. There's an ifdef in DynFlags thus
#if __GLASGOW_HASKELL__ <= 810
| otherwise = panic $ "Invalid cfg parameters." ++ exampleString
but somehow it's not triggering for the stage2 compiler.
Any ideas? It's blocking a full build.
This #ifdef was added in 8038cbd96f4, when GHC became better at reporting redundant code.
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