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RecordWildCards trigger "Impossible happened" in Lucius

    • Closed Issue created by Koterpillar @trac-Koterpillar

    The presence of RecordWildCards in the following code makes GHC crash with "impossible happened".

    #!/usr/bin/env stack
-- stack --resolver lts-7.5 runghc --package shakespeare
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE RecordWildCards #-}

import Text.Lucius

renderPrintStylesheet = [lucius|p{}|]

main :: IO ()
main = return ()
    ghc: panic! (the 'impossible' happened)
  (GHC version 8.0.1 for x86_64-unknown-linux):
	find_tycon
  Block
  []

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

    Removing RecordWildCards makes the program compile.

    Trac metadata
    Trac field Value
    Version 8.0.1
    Type Bug
    TypeOfFailure OtherFailure
    Priority normal
    Resolution Unresolved
    Component Compiler
    Test case
    Differential revisions
    BlockedBy
    Related
    Blocking
    CC
    Operating system
    Architecture
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