internal error: stg_ap_pppppp_ret

We started getting the following from our app; though it's not reliably reproducible:

internal error: stg_ap_pppppp_ret
    (GHC version 8.0.1 for x86_64_unknown_linux)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
Abort

Unfortunately I cannot share code, nor I can upgrade to GHC 8.0.2 due to work environment restrictions. My apologies for the worst bug report.

Neither google nor Trac searches produced anything related. I'm wondering if anybody has seen this, or have any ideas where to look at.

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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