Maybe this is something I shouldn't be doing, but I thought it was worth mentioning in case I have found a compiler bug.

Should I file a bug for this?

cabal install --allow-newer=base  accelerate
...
[10 of 10] Compiling Data.Label.Base  ( src/Data/Label/Base.hs, dist/build/Data/Label/Base.o )
ghc: internal error: PAP object entered!
    (GHC version 7.10.0.20150123 for x86_64_apple_darwin)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug