GHC bug using darcs on Kubuntu 13.04

I was trying to push a Darcs patch when it failed with a GHC error. This is the text of the error message on the console:

darcs: internal error: evacuate: strange closure type 536064
    (GHC version 7.6.2 for x86_64_unknown_linux)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
Aborted (core dumped)

Not sure if this is exactly what is required when reporting a bug, I am very new to this and am unsure of the procedures involved regarding GHC bug reporting.

Thanks in advance.

Edited Mar 09, 2019 by Herbert Valerio Riedel

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GHC bug using darcs on Kubuntu 13.04