I just finished tracking down the source of the following error from
GHCi:
ghc-6.2: panic! (the `impossible' happened, GHC version 6.2):
Bytecode generator can't handle unboxed tuples. Possibly due
to foreign import/export decls in source. Workaround:
compile this module to a .o file, then restart session.
Some clue to the source of the problem would be quite helpful. (I
expect just about anything to at least be sometime useful -- even if
it's the low-level input to bytecode generator.)
It turns out the source of the problem is a definition in an imported
.hi file. Would it be possible for GHCi to prune the inlined
definitions containing unboxed tuples and use the non-inlined ones?
(Are the non-inline definitions are in the object file? "nm" suggests
they are.)
The best fix, of course, would be to make the bytecode generator
handle unboxed tuples.
thanks,
mike
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