SI-6017 Scaladoc's Index should be case-sensitive
Forgot to cherry-pick the .check file
There is no "letters" method in this branch
SI-4976 Scaladoc: Add a source link to package objects
SI-6853 changed private method remove to be tail recursive.
Operations += and -= on mutable.ListMap rely on the private method remove to perform. This methods was implemented using recursion, but it was not tail recursive. When the ListMap got too big the += caused a StackOverflowError.
Revert "SI-6601 Publicise derived value contstructor after pickler"

This reverts commit b07228aebe7aa620af45a681ef60d945ffc65665.

The remedy was far worse than the disease:

    % cat sandbox/test.scala
    class V private (val a: Any) extends AnyVal

    % RUNNER=scalac scala-hash b07228aebe sandbox/test.scala
    [info] b07228aebe => /Users/jason/usr/scala-v2.10.0-256-gb07228a

    % scala-hash b07228aebe
    [info] b07228aebe => /Users/jason/usr/scala-v2.10.0-256-gb07228a
    Welcome to Scala version 2.10.1-20130116-230935-b07228aebe (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_27).
    Type in expressions to have them evaluated.
    Type :help for more information.

    scala> def foo(v: V) = v.a == v.a
    exception when typing v.a().==(v.a())/class scala.reflect.internal.Trees$Apply
    constructor V in class V cannot be accessed in object $iw in file <console>
    scala.reflect.internal.Types$TypeError: constructor V in class V cannot be accessed in object $iw
[backport] Fix for SI-6206, inconsistency with apply.

Squashed commit of the following:

commit f6bbf85150cfd7e461989ec1d6765ff4b4aeba51
Author: Paul Phillips <paulp@improving.org>
Date:   Mon Oct 1 09:10:45 2012 -0700

    Fix for SI-6206, inconsistency with apply.

    The code part of this patch is 100% written by retronym, who
    apparently has higher standards than I do because I found it just
    lying around in his repository. I think I'll go pick through his
    trash and see if he's throwing away any perfectly good muffins.

    I made the test case more exciting so as to feel useful.
    (cherry picked from commit 267650cf9c3b07e360a59f3c5b70b37fea9de453)
[backport] SI-2968 Fix brace healing for `^case (class|object) {`

Squashed commit of the following:

commit 24828531f62ce05402c96c04d7096e82d5f4e3bf
Author: Jason Zaugg <jzaugg@gmail.com>
Date:   Sun Oct 21 23:34:35 2012 +0200

    SI-2968 Fix brace healing for `^case (class|object) {`

    The scanner coalesces the pair of tokens into CASEOBJECT or
    CASECLASS, but fails to set `offset` back to the start of `case`.
    Brace healing is then unable to correctly guess the location of
    the missing brace.

    This commit resets `offset` and `lastOffset`, as though
    caseobject were a single keyword. Only the former was neccessary
    to fix this bug; I haven't found a test that shows the need for
    the latter.
    (cherry picked from commit cbad218dba47d49a39897b86d467c384538fdd53)
[backport] SI-3577 BoundedWildcardType handling

commit 3c91b32d699a9e29d685ac20c9805f96c9f2db2c
Author: Jason Zaugg <jzaugg@gmail.com>
Date:   Fri Aug 24 01:16:47 2012 +0200

    Mention BoundedWildcardType in "a standard type pattern match".
    (cherry picked from commit 00e46b3dbcea2b72fd3941b7ffc2efba382871e9)

commit 0664be2b69b1ce013e937bc93f4e84b891676f1f
Author: Jason Zaugg <jzaugg@gmail.com>
Date:   Fri Aug 24 01:05:07 2012 +0200

    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)
    (cherry picked from commit 2b4e7183fd24113cca5e868456668fd05c848168)

commit 6ad651c94faf463133c742feb2aee59ef782ea1f
Author: Jason Zaugg <jzaugg@gmail.com>
Date:   Fri Aug 24 00:54:59 2012 +0200

    SI-3577 Make varianceInType aware of BoundedWildcardType.
    (cherry picked from commit 21105654c40ed0c462142bcbb6c8eced77f8b07a)
A test case to guide the eventual fix for SI-6601.

This demonstrates the need for the reversion in the
previous commit.
SI-6968 Simple Tuple patterns aren't irrefutable

Reverts part of c82ecab. The parser can't assume that
a pattern `(a, b)` will match, as results of
`.isInstanceOf[Tuple2]` can't be statically known until
after the typer.

The reopens SI-1336, SI-5589 and SI-4574, in exchange for fixing
this regression SI-6968. Keeping all of those fixed will require
a better definition of irrefutability, and some acrobatics to
ensure safe passage to the ambiguous trees through typechecking.
Move a test from pos to run to highlight bytecode deficiencies.

We'll address them in subsequent commits.
SI-7035 Centralize case field accessor sorting.

It is both burdensome and dangerous to expect callers
to reorder these. This was seen in the field permutation
in the unapply method; a regression in 2.10.0.
[backport] SI-5378, unsoundness with type bounds in refinements.

As the comment says:

Not enough to look for abstract types; have to recursively check
the bounds of each abstract type for more abstract types. Almost
certainly there are other exploitable type soundness bugs which
can be seen by bounding a type parameter by an abstract type which
itself is bounded by an abstract type.

SPECIAL: BUY ONE UNSOUNDNESS, GET ONE FREE

In refinement types, only the first parameter list of methods
was being analyzed for unsound uses of abstract types. Second
parameter list and beyond had free unsoundness reign. That bug
as well is fixed here.
SI-5313 Do not eliminate stores that potentially wipe referenes

Storing to local variables of reference or array type is indirectly
observable because it potentially allows gc to collect an object. So
this commit makes DeadCodeElimination mark a store necessary if it
assigns to a local that potentially stored by a previous necessary store.
Merge pull request #1981 from retronym/backport/1187

[backport] SI-3577 BoundedWildcardType handling
[backport] SI-6301 / SI-6572 specialization regressions

Squashed commit of the following:

commit a3680be29ccd5314c5d027d473b37940eaecd530
Author: Paul Phillips <paulp@improving.org>
Date:   Fri Aug 31 10:20:16 2012 -0700

    Actual fix for SI-6301, specialized crasher.

    This means the workaround in the previous commit is no
    longer reached, but it should remain where it is as a much
    needed layer of robustness/useful error reporting.

    Conflicts:
    	src/compiler/scala/tools/nsc/transform/SpecializeTypes.scala
    	src/compiler/scala/tools/nsc/typechecker/Duplicators.scala

commit f4c45ae204ce3ff3c16b19cab266d0b6515b6e0f
Author: Paul Phillips <paulp@improving.org>
Date:   Fri Aug 31 10:49:24 2012 -0700

    Rewrite of GenICode adapt.

    Started for debuggability, stayed for clarify/performance.

    Conflicts:
    	src/compiler/scala/tools/nsc/backend/icode/GenICode.scala

commit 74842f72a0af485e5def796f777f7003f969d75b
Author: Paul Phillips <paulp@improving.org>
Date:   Fri Aug 31 08:45:34 2012 -0700

    Workaround for SI-6301, @specialize crasher.

    SpecializeTypes is generating symbols with overloaded types
    which then proceed to crash in CleanUp or GenICode.  Until I
    or someone works out why that is, take a look in case the
    overload is easily disambiguated by the argument list arity,
    in which case warn and proceed.
SI-6572 Test case, originally fixed in a3680be.

That fix has now been backported to 2.10.x in the
previous commit. This commit should be be merged
to master.
[backport] Fix for SI-6154, VerifyError originating in uncurry.

Lhs still might be an Ident.  Miguel did all the work,
I just wrote it down in code form.
(cherry picked from commit 48f8235822a2a100d6c4e8d3d7349df565ac6d40)
Optimization in AsSeenFromMap.

Despite all the eyes which have traveled over this code,
we all managed to miss this:

  // Note that pre and clazz are fixed at construction
  class AsSeenFromMap(pre: Type, clazz: Symbol) {
    ...
    def apply(tp: Type): Type =
      if (skipPrefixOf(pre, clazz)) tp
      else ...
  }

Additionally, the exclusion condition in asSeenFrom contained
a useless check, here:

  // !isPossiblePrefix(clazz) alone is enough
  pre.normalize.isTrivial && !isPossiblePrefix(clazz)