SI-6258 Reject partial funs with undefined param types

This regressed with virtpatmat.

With -Xoldpatmat, pattern matching anonymous functions with
an expected type of PartialFunction[A, B] are translated to
a Function tree, and typed by typedFunction, which issues an
error of the parameter types are not fully defined.

This commit adds the same check to MatchFunTyper.

It doesn't plug the hole in RefChecks#validateVariance (which is
reminiscent of SI-3577.) Seems to me that in general one should handle:
  a) both BoundedWildcardType and WildcardType
     when in a place that can be called during inference, or
  b) neither otherwise
SI-3577 Make varianceInType aware of BoundedWildcardType.
Make RefChecks#validateVariance aware of BoundedWildcardType.

The only test case that I know for this will be neutered
by the imminent fix for SI-6258; so I haven't been able to
test this.

But trying this manually, you can see that this patch defers the
the SI-6258 to the erasure phase.

Original:

scala.MatchError: ? (of class scala.reflect.internal.Types$BoundedWildcardType)
	at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer$$anon$3.scala$tools$nsc$typechecker$RefChecks$RefCheckTransformer$$anon$$validateVariance$1(RefChecks.scala:894)
	at scala.tools.nsc.typechecker.RefChecks$RefCheckTransformer$$anon$3.validateVariance(RefChecks.scala:965)

Modified:

java.lang.ClassCastException: scala.reflect.internal.Types$TypeRef$$anon$6 cannot be cast to scala.reflect.internal.Types$TypeBounds
	at scala.reflect.internal.Types$TypeMap.mapOver(Types.scala:4160)
	at scala.reflect.internal.transform.Erasure$ErasureMap.apply(Erasure.scala:156)
Mention BoundedWildcardType in "a standard type pattern match".
SI-5767 fix + small HashSet/HashMap fixes

- `LinkedHashSet` implementation moved from `FlatHashTable` to `HashTable`
   - `remove` time reduced from O(n) to O(1)
   - `diff` time reduced from O(n^2) to O(n)
- A bit of refactoring in `HashTable` serialization code
- Putting an element into hash map now avoids double hash code/hash index
  calculation (see `HashTable#findOrAddEntry`)
- bugfix: compiler/LambdaLift occasionally breaks LinkedHashSet integrity
Rank based take/drop/slice.

Tree navigation based on node rank is faster than using compare
method. rank is simply count(tree.left) + 1.
Making public methods of FlatHashTable protected

As discussed in https://groups.google.com/forum/?pli=1#!topic/scala-internals/1yABM30POS0
Added a heuristic to the inliner.

But it's commented out because I want to get this logging
code into 2.10 without including anything "interesting".
Worked around SI-6161 by annotating abstract type.
Took measures to quiet down specialization logging.

While hopefully still hearing about certain things (like symbol renames)
when it's not a specialized symbol.
Large logging cleanup effort.

Quieted down many logging statements which contribute
disproportionate noise.  Made others emit something more sensible.
Spent lots of time on the inliner trying to find a regular
format to make the logs more readable.  Long way to go here but
it'd be so worth it to have readable logs instead of mind-numbing
indiscriminate text dumps.
Cleanup makeShadowingTable, save some memory. Review by @VladUreche or @heathermiller.
Remove extraneous null check in RedBlackTree

This changes the RedBlackTree foreach method to be be a simple wrapper around
a slightly shorter function, without an unnecessary nullity check.
several fixes to scala.concurrent.util.Duration

- add test cases (migrated from Akka sources)
- add overflow checking (will throw IllegalArgumentException instead of
  giving wrong results)
- make string parsing more precise when giving >100days in nanoseconds
- make method signatures more precise in retaining FiniteDuration
  throughout calculations
- fix mul/div of infinities by negative number
- add Ordering for Deadline (was accidentally left out earlier)
Sort files to see if we get reproducible testing results across linux/mac
More fix for invalid companions.

Eliminated InvalidCompanions exception entirely.  Anyone's
guess why we unholstered this exception every time someone
calls "isCodefinedWith" rather than when symbols are created.
I moved the check into Namers, where it can be done once and
with sufficient finesse not to crash so much.

With this patch in place, "playbench" can be built with java7.
Merge pull request #1260 from jsuereth/issue/5031

Issue/5031
removes Type.isConcrete

This method was no longer used anywhere, except for a place where it wasn't
really necessary.

Its implementation is non-trivial, and I have doubts about it, so I propose
to remove it altogether instead of living with some dubious code necessary
for some dubious matter.
Fixes SI-6271 - Missing isEmpty override for views.

GenIterableView didn't override isEmpty for views to look at *filtered* iterator, but was instead pulling
unfiltered iterator and causing issues.   Chalk up another bizzare bug to lack of insight/visibility into
linearization and what havoc overriding new methods can spew on our library.
Merge pull request #1266 from scalamacros/topic/removes-isconcrete

removes Type.isConcrete