Simon Peyton Jones via ghc-devs <[email protected]> writes: > 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 > > #endif > 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. > Simon
Indeed it would be nice to know which compiler you are using to bootstrap. I suspect Sylvain is correct that the alternative can be removed but first I would like to understand why this is arising only now. Cheers, - Ben
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