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In e0853b3, a space-saving optimization elided the outer pointer
of inner classes if the the (protected) outer pointer of the
immediate parent class was guaranteed to point to the same instance.
But, this check failed to account for Java parent classes, which
don't follow the Scala scheme. This commit disables the optimization
in that case.
The original test case in e0853b3 was anemic, I've fleshed it out to:
- test the presense or absense of $outer pointers with Java reflection
- test the optimization works in the presense of aliased and annotated
aliased types. (The former worked already, the latter required a
change to the implementation.)
- Test the negative case when the prefixes don't line up and the
subclass in fact needs its own $outer.
This patch is based on work by Euguene Vigdorchik with some
additions by Jason Zaugg.
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