internal error: ARR_WORDS object entered!

In ghci,

:m Data.Complex.Cyclotomic
goldenRatio

produces the error.

<interactive>: internal error: ARR_WORDS object entered!
    (GHC version 7.8.3 for x86_64_unknown_linux)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
Aborted (core dumped)

Edited Mar 10, 2019 by Ben Gamari

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