GHC crashes when both -shared and --make flags are specified

I'm not even sure if you're meant to be able to do this, but I wanted to build a DLL without manually specifying the files, so I tried to do the build and the archiving in one step.

But I get a panic:

>ghc -shared --make LibFunslang
ghc: panic! (the 'impossible' happened)
  (GHC version 6.8.1 for i386-unknown-mingw32):
        main/DriverPipeline.hs:(270,0)-(337,23): Non-exhaustive patterns in function link

Edited Mar 09, 2019 by Ian Lynagh -

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GHC crashes when both -shared and --make flags are specified