In haskell#4017, hvr reported that when he used --allow-older/--allow-newer, there was an assert failure in toConfiguredComponent. Indeed the problem was that toConfiguredComponent was testing version ranges of build-depends to determine which package to select, but there was no satisfying one (since the build-depends field had not been updated.) After thinking about this for a bit, it seemed a bit bogus for us to be doing another version check at this late phase; we already picked dependencies earlier in the configuration process. So I decided to drop it. To drop it, however, I needed to remove support for a feature (discussed in haskell#4020), which uses version ranges to disambiguate whether or not a dependency is on an external package or an internal package. This feature doesn't seem to be very useful. If someone asks, I'll check on Hackage to see if anyone is using it. Also added some useful extra debug info. Fixes haskell#4020 and haskell#4017 Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

toConfiguredComponent doesn't seem to respect allow-older/allow-newer #4017

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