Fixes #6543
6543 is also a fine NGC object.

R=golang-dev, dsymonds, kamil.kisiel, minux.ma
CC=golang-dev
https://golang.org/cl/14515044

But they cannot be dereferenced.
See also issue 6116.

Fixes #6358.

R=r, rsc, iant, ken
CC=golang-dev
https://golang.org/cl/14374046

The Go compiler emits extra information for this case:

imported and not used: "sandbox/foo_bar" as bar

R=adonovan
CC=golang-dev
https://golang.org/cl/14111043

Like FreeBSD, DragonFly does not provide a sysconf value for
_SC_GETPW_R_SIZE_MAX.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/14469043

All of the currently supported platforms have a working user
implementation and do not use stubs. As a result, enable the tests
on all platforms rather than whitelisting.

R=golang-dev, dave, iant
CC=golang-dev
https://golang.org/cl/14454044

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/14470043

See Rob Pike's lesson on shortcuts, https://plus.google.com/101960720994009339267/posts/R58WgWwN9jp

R=golang-dev, r, rsc
CC=aram.h, golang-dev
https://golang.org/cl/14374045

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/14467045

R=golang-dev, adg
CC=golang-dev, mikioh.mikioh
https://golang.org/cl/14417043

If an iterator is started while a map is in the middle of a grow,
and the map has NaN keys, then those keys might get returned by
the iterator more than once.  This fix makes the evacuation decision
deterministic and repeatable for NaN keys so each one gets returned
only once.

R=golang-dev, r, khr, iant
CC=golang-dev
https://golang.org/cl/14367043

R=golang-dev, cshapiro, iant
CC=golang-dev
https://golang.org/cl/14405043

The gccgo implementation mishandled calling Interface on a
value created by MakeFunc.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/14401043

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/14379043

Fixes #6417

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/14231047

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/14375043

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/14364043

No semantic spec changes.

R=r
CC=golang-dev
https://golang.org/cl/14363043

Failure occurred when using reflect.Call to pass a func value
following a non-pointer value.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/14186043

R=golang-dev, mirtchovski, r
CC=golang-dev
https://golang.org/cl/14227043

Full credit goes to gri and rsc for their explanations.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/14229043

That page may be fine for experienced Go programmers
but it's not really targeting new programmers.
There's too much we don't know yet.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/14345043

Explain for those unfamiliar with twos-complement arithmetic how to
implement negation of signed positive constant.
Fixes #6408.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/14267044

Update #5429

R=golang-dev, r, dan.kortschak
CC=golang-dev
https://golang.org/cl/14293043

Changing from 4 kB to 8 kB brings significant improvement
on a variety of the Go 1 benchmarks, on both amd64
and 386 systems.

Significant runtime reductions:

          amd64  386
GoParse    -14%  -1%
GobDecode  -12% -20%
GobEncode  -64%  -1%
JSONDecode  -9%  -4%
JSONEncode -15%  -5%
Template   -17% -14%

In the longer term, khr's new stacks will avoid needing to
make this decision at all, but for Go 1.2 this is a reasonable
stopgap that makes performance significantly better.

Demand paging should mean that if the second 4 kB is not
used, it will not be brought into memory, so the change
should not adversely affect resident set size.
The same argument could justify bumping as high as 64 kB
on 64-bit machines, but there are diminishing returns
after 8 kB, and using 8 kB limits the possible unintended
memory overheads we are not aware of.

Benchmark graphs at
http://swtch.com/~rsc/gostackamd64.html
http://swtch.com/~rsc/gostack386.html

Full data at
http://swtch.com/~rsc/gostack.zip

R=golang-dev, khr, dave, bradfitz, dvyukov
CC=golang-dev
https://golang.org/cl/14317043

Fixes #5633.

R=golang-dev, r, tommi.virtanen, adg, nj
CC=golang-dev
https://golang.org/cl/14283044

Add the -installsuffix flag to gc and {5,6,8}l, which overrides -race
for the suffix if both are supplied.
Pass this flag from the go tool for build and install.

R=rsc
CC=golang-dev
https://golang.org/cl/14246044

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/14259043

Fixes #6324.

R=golang-dev, iant, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/13280049

Fixes #3524.

R=golang-dev, iant, r
CC=golang-dev
https://golang.org/cl/14296043

Fixes #6456.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/14289043

It is not possible to use (there is no declaration in package syscall),
and no one seems to care.

Alex Brainman may bring this back properly for Go 1.3.

Fixes #6338.

R=golang-dev, r, alex.brainman
CC=golang-dev
https://golang.org/cl/14287043

so that we don't need worry about specifying the required
libc version (note: as cmd/go will still be dynamically
linked to libc, we still need to perform the build on OSes
with an old enough libc. But as cmd/go doesn't rely on many
libc symbols, the situation should be significantly better).

Fixes #3564.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/14261043

RawMessage is useful and mildly non-obvious.
Given the frequency with which RawMessage questions
show up on golang-nuts, and get answered with an example,
I suspect adding an example to the docs might help.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/14190044

Use it as a teaching example about how to solve this problem.

Fixes #6501

R=golang-dev, adg, rsc
CC=golang-dev
https://golang.org/cl/14250043

Fixes #6443.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/14231045

Not scanning the stack by frames means we are reintroducing
a few false positives into the collection. Run the finalizer registration
in its own goroutine so that stack is guaranteed to be out of
consideration in a later collection.

This is working around a regression from yesterday's tip, but
it's not a regression from Go 1.1.

R=golang-dev
TBR=golang-dev
CC=golang-dev
https://golang.org/cl/14290043

R=rsc
CC=golang-dev
https://golang.org/cl/14188044

Ticket 13740047 updated the documented TLS version to 1.2.
This also updates the RFC refered to.

R=golang-dev
CC=golang-dev, rsc
https://golang.org/cl/14029043

Walking the stack by frames is ~3x more expensive
than not, and since it didn't end up being precise,
there is not enough benefit to outweigh the cost.

This is the conservative choice: this CL makes the
stack scanning behavior the same as it was in Go 1.1.

Add benchmarks to package runtime so that we have
them when we re-enable this feature during the
Go 1.3 development.

benchmark                     old ns/op    new ns/op    delta
BenchmarkGoroutineSelect        3194909      1272092  -60.18%
BenchmarkGoroutineBlocking      3120282       866366  -72.23%
BenchmarkGoroutineForRange      3256179       939902  -71.13%
BenchmarkGoroutineIdle          2005571       482982  -75.92%

The Go 1 benchmarks, just to add more data.
As far as I can tell the changes are mainly noise.

benchmark                         old ns/op    new ns/op    delta
BenchmarkBinaryTree17            4409403046   4414734932   +0.12%
BenchmarkFannkuch11              3407708965   3378306120   -0.86%
BenchmarkFmtFprintfEmpty                100           99   -0.60%
BenchmarkFmtFprintfString               242          239   -1.24%
BenchmarkFmtFprintfInt                  204          206   +0.98%
BenchmarkFmtFprintfIntInt               320          316   -1.25%
BenchmarkFmtFprintfPrefixedInt          295          299   +1.36%
BenchmarkFmtFprintfFloat                442          435   -1.58%
BenchmarkFmtManyArgs                   1246         1216   -2.41%
BenchmarkGobDecode                 10186951     10051210   -1.33%
BenchmarkGobEncode                 16504381     16445650   -0.36%
BenchmarkGzip                     447030885    447056865   +0.01%
BenchmarkGunzip                   111056154    111696305   +0.58%
BenchmarkHTTPClientServer             89973        93040   +3.41%
BenchmarkJSONEncode                28174182     27933893   -0.85%
BenchmarkJSONDecode               106353777    110443817   +3.85%
BenchmarkMandelbrot200              4822289      4806083   -0.34%
BenchmarkGoParse                    6102436      6142734   +0.66%
BenchmarkRegexpMatchEasy0_32            133          132   -0.75%
BenchmarkRegexpMatchEasy0_1K            372          373   +0.27%
BenchmarkRegexpMatchEasy1_32            113          111   -1.77%
BenchmarkRegexpMatchEasy1_1K            964          940   -2.49%
BenchmarkRegexpMatchMedium_32           202          205   +1.49%
BenchmarkRegexpMatchMedium_1K         68862        68858   -0.01%
BenchmarkRegexpMatchHard_32            3480         3407   -2.10%
BenchmarkRegexpMatchHard_1K          108255       112614   +4.03%
BenchmarkRevcomp                  751393035    743929976   -0.99%
BenchmarkTemplate                 139637041    135402220   -3.03%
BenchmarkTimeParse                      479          475   -0.84%
BenchmarkTimeFormat                     460          466   +1.30%

benchmark                          old MB/s     new MB/s  speedup
BenchmarkGobDecode                    75.34        76.36    1.01x
BenchmarkGobEncode                    46.50        46.67    1.00x
BenchmarkGzip                         43.41        43.41    1.00x
BenchmarkGunzip                      174.73       173.73    0.99x
BenchmarkJSONEncode                   68.87        69.47    1.01x
BenchmarkJSONDecode                   18.25        17.57    0.96x
BenchmarkGoParse                       9.49         9.43    0.99x
BenchmarkRegexpMatchEasy0_32         239.58       241.74    1.01x
BenchmarkRegexpMatchEasy0_1K        2749.74      2738.00    1.00x
BenchmarkRegexpMatchEasy1_32         282.49       286.32    1.01x
BenchmarkRegexpMatchEasy1_1K        1062.00      1088.96    1.03x
BenchmarkRegexpMatchMedium_32          4.93         4.86    0.99x
BenchmarkRegexpMatchMedium_1K         14.87        14.87    1.00x
BenchmarkRegexpMatchHard_32            9.19         9.39    1.02x
BenchmarkRegexpMatchHard_1K            9.46         9.09    0.96x
BenchmarkRevcomp                     338.26       341.65    1.01x
BenchmarkTemplate                     13.90        14.33    1.03x

Fixes #6482.

R=golang-dev, dave, r
CC=golang-dev
https://golang.org/cl/14257043

Added a new $GO_DISTFLAGS to make.bash, and while we're here,
added mention $CXX in make.bash (CL 13704044).

Fixes #6448.
Update #3564
We can pass GO_DISTFLAGS=-s from misc/dist to make.bash so that
it will build a statically linked toolchain.
(Note: OS X doesn't have the concept of static linking, so don't
pass GO_DISTFLAGS=-s for OS X builds)

R=adg, rsc, iant
CC=golang-dev
https://golang.org/cl/13887043