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mjrosenb/gist:bb24d601a8e8a9f1ee061094c05cedf8

Created March 13, 2019 08:37
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<no location info>: error:
ghcjs: panic! (the 'impossible' happened)
(GHC version 8.4.2.20180420 for x86_64-unknown-linux):
getClassPredTys
K1 i_ilY5 c_ilY6 a_ilY7
Call stack:
CallStack (from HasCallStack):
callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc-api-ghcjs-8.4.0-9saUAIyLdpcrJpkUuwAkh:Outputable
pprPanic, called at compiler/types/Type.hs:1766:29 in ghc-api-ghcjs-8.4.0-9saUAIyLdpcrJpkUuwAkh:Type
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
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