A matter on form in documentation.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13087043

This may possibly be the root cause of flaky dual stack tests.

Update #4176
Update #5001

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13050043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13080043

Original CL by minux (9545044).

Update #6146

R=golang-dev, rsc
CC=golang-dev, minux.ma
https://golang.org/cl/12949045

The limit is 500. There is no way to change it.
This primarily affects name resolution.
If a million goroutines try to resolve DNS names,
only 500 will get to execute cgo calls at a time.
But in return the operating system will not crash.

Fixes #5625.

R=golang-dev, dan.kortschak, r, dvyukov
CC=bradfitz, golang-dev
https://golang.org/cl/13038043

Actually working to stay within the limit could cause subtle deadlocks.
Crashing avoids the subtlety.

Fixes #4056.

R=golang-dev, r, dvyukov
CC=golang-dev
https://golang.org/cl/13037043

When the new call site-specific frame bitmaps are available,
we can cut the zeroing to just those values that need it due
to scope escaping.

R=cshapiro, cshapiro
CC=golang-dev
https://golang.org/cl/13045043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13067043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13065043

Fixes #6161.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13059043

Fixes #6166.
Fixes #6168.

R=golang-dev, bradfitz, remyoudompheng
CC=golang-dev
https://golang.org/cl/12927045

When identifying structs or interfaces we really want to know
their makeup, not just their name.

R=adonovan
CC=golang-dev
https://golang.org/cl/13042043

Fixes #6107.
race: output goroutine 1 as main goroutine

Fixes #6130.
race: option to abort program on first detected error

R=golang-dev, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/12968044

Fixes #6165.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/12984044

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/12759043

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/12890044

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12740046

This time we're going for 5!
http://goo.gl/3ETYH7

Fixes #3790
Yeah, right.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13002044

Fixes #6160.

««« original CL description
go/doc: permit a package synopsis to end with ":\n".

R=gri, r
CC=golang-dev
https://golang.org/cl/12822043
»»»

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13040043

Jumps to the same file will use the original buffer, not the
coverage buffer. Making it work for the coverage buffer isn't
worth the trouble, especially because it would break as soon as
you jump to a different file and back.

Use error instead of message so it actually terminates

R=adonovan
CC=golang-dev
https://golang.org/cl/13041043

R=adonovan
CC=golang-dev
https://golang.org/cl/12744046

Fixes #6156.

R=adonovan
CC=golang-dev
https://golang.org/cl/13035043

They're baked into the godoc binary now.

R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/12751047

When the packages the tested package depends on don't build,
we weren't getting out early. Added a simple check for a successful
build to an existing early out.

There may be other ways that double compilation arises, but
this fixes the one listed in the issue.
Fixes #5679

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/13036043

        _ = complex("foo", 0)
        _ = complex(true, 0)
now trigger:
        x.go:4: invalid operation: complex("foo", 0) (mismatched types untyped string and untyped number)
        x.go:5: invalid operation: complex(true, 0) (mismatched types untyped bool and untyped number)

Fixes #4521

R=golang-dev, remyoudompheng, rsc
CC=golang-dev
https://golang.org/cl/12973043

Also fixes color gradient being calculated against the wrong maximum.

R=adonovan
CC=golang-dev
https://golang.org/cl/12968043

The goal is to stop only those programs that would keep
going and run the machine out of memory, but before they do that.
1 GB on 64-bit, 250 MB on 32-bit.
That seems implausibly large, and it can be adjusted.

Fixes #2556.
Fixes #4494.
Fixes #5173.

R=khr, r, dvyukov
CC=golang-dev
https://golang.org/cl/12541052

Use more compressed image to reduce source clutter.

Fixes #5983.

R=nigeltao, adg
CC=golang-dev
https://golang.org/cl/12513044

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/13024045

Rows.Close.

Previously, callers that followed the example code (but not call
rows.Close after "for rows.Next() { ... }") could leak statements if
the driver returned an error other than io.EOF.

R=bradfitz, alex.brainman
CC=golang-dev, rsc
https://golang.org/cl/12677050

TBR=dvyukov
CC=golang-dev
https://golang.org/cl/12791044

Also start of some test helper unification, long overdue.
I refrained from cleaning up the rest in this CL.

Fixes #6157

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13030043

It's nearly useless and for plain 'go doc', 'godoc .' works fine.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13004044

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12931044

It's next to useless and confusing as well. Let's make godoc better instead.

Fixes #4849.

R=golang-dev, dsymonds, adg, rogpeppe, rsc
CC=golang-dev
https://golang.org/cl/12974043

One was tiny. One was gigantic. Now one is gone and one is giganticer.

No code changes.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13025043

See golang.org/s/go12nil.

This CL is about getting all the right checks inserted.
A followup CL will add an optimization pass to
remove redundant checks.

R=ken2
CC=golang-dev
https://golang.org/cl/12970043

See golang.org/s/go12nil for the extended version.

R=golang-dev, r, adonovan
CC=golang-dev
https://golang.org/cl/12964043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12858044

R=golang-dev, jsing
CC=golang-dev
https://golang.org/cl/12876044