Bug#900173: Still seeing strange closure type

[Anthony DeRobertis]

Just to check in, I've still been seeing this fairly consistently.
Hoping someone can suggest some further debugging steps.

Today the message seems slightly different:

[2019-01-14 12:06:24.690252594] main: starting assistant version 7.20181211
git-annex: internal error: evacuate: strange closure type 4325407
    (GHC version 8.4.4 for x86_64_unknown_linux)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

so the number has changed from 4325404 to 4325407. Not sure if that
means anything.