Unify with array/slice errors, which were already good.

Fixes #4232.

R=ken2
CC=golang-dev
https://golang.org/cl/7271046

Fixes #3915.
Fixes #3923.

R=ken2
CC=golang-dev
https://golang.org/cl/7281044

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7275045

Those symbols are only allowed during imports;
the parser may expect them but saying that doesn't help users.

Fixes #3434.

R=ken2
CC=golang-dev
https://golang.org/cl/7277045

More efficient, less racy code.

Fixes #4014.

R=ken2, ken
CC=golang-dev
https://golang.org/cl/7275047

For consistency with conversions that look like function calls,
conversions that don't look like function calls now allow an
optional trailing comma.

That is, int(x,) has always been syntactically valid.
Now []int(x,) is valid too.

Fixes #4162.

R=ken2
CC=golang-dev
https://golang.org/cl/7288045

Fixes #4618.

R=ken2
CC=golang-dev
https://golang.org/cl/7278048

Fixes #4667.

R=ken2
CC=golang-dev
https://golang.org/cl/7275046

R=ken2
CC=golang-dev
https://golang.org/cl/7276048

This CL also replaces similar loops in other stdlib
package tests with calls to AllocsPerRun.

Fixes #4461.

R=minux.ma, rsc
CC=golang-dev
https://golang.org/cl/7002055

Fixes #3202. (Or rather, work around issue 3202)

R=alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/7202053

Add Order field to doc.Example and write doc comments there.

Fixes #4662.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7229071

Fixes #4743.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7284044

Fixes #4686.

R=alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/7174047

R=golang-dev, dave, alex.brainman
CC=golang-dev
https://golang.org/cl/7133064

Fixes #4620.

R=rsc
CC=golang-dev
https://golang.org/cl/7241051

Expressions involving nil, even if they can be evaluated
at compile time, do not count as Go constants and cannot
be used in const initializers.

Fixes #4673.
Fixes #4680.

R=ken2
CC=golang-dev
https://golang.org/cl/7278043

Fixes #4452.

R=ken2
CC=golang-dev
https://golang.org/cl/7241065

Fixes #4663.

R=ken2
CC=golang-dev
https://golang.org/cl/7235081

Fixes #4654.

R=ken2
CC=golang-dev
https://golang.org/cl/7229072

The spec mostly uses the term embedded.
It's too late to change the field name but at least fix the docs.

Fixes #4514.

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/7235080

Impossible for us to check (without sleazily reaching into the
runtime) but at least document it.

Fixes #3800.

R=golang-dev, bradfitz, dave
CC=golang-dev
https://golang.org/cl/7268043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7252045

Change the stack unwinding code to compensate for the dynamic
relocation of symbols.
Change the gc instruction GC_CALL to use a relative offset instead of
an absolute address.

R=golang-dev
CC=golang-dev
https://golang.org/cl/7248048

Fixes #4736.

R=rsc
CC=golang-dev
https://golang.org/cl/7239045

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7220075

This updates: https://golang.org/cl/6909059/
Fixes #4511.

R=minux.ma, rsc
CC=golang-dev
https://golang.org/cl/6932054

Everybody either gets confused and thinks this is
TrimLeft/TrimRight or does this by hand which gets
repetitive looking.

R=rsc, kevlar
CC=golang-dev
https://golang.org/cl/7239044

Added the -pic flag to 6c and 6g to avoid assembler instructions that
cannot use RIP-relative adressing. This is needed to support the -shared mode
in 6l.

See also:
https://golang.org/cl/6926049
https://golang.org/cl/6822078

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7064048

* Separate internal and external LockOSThread, for cgo safety.
* Show goroutine that made faulting cgo call.
* Never start a panic due to a signal caused by a cgo call.

Fixes #3774.
Fixes #3775.
Fixes #3797.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7228081

Cut out temporary cgo file in error message.
Show C.foo instead of _Ctype_foo.

Before:
x.go:20[/var/folders/00/05_b8000h01000cxqpysvccm000n9d/T/go-build242036121/command-line-arguments/_obj/x.cgo1.go:19]: cannot use tv.Usec (type int32) as type _Ctype___darwin_suseconds_t in assignment

After:
x.go:20: cannot use tv.Usec (type int32) as type C.__darwin_suseconds_t in assignment

Fixes #4255.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7231075

The old version was using go/ast's CommentGroup.Text method,
but that method drops leading blank lines from the result, so that
if the comment looked like one of

//
// syntax error
import "C"

/*
syntax error
*/
import "C"

then the line numbers for the syntax error would be off by the
number of leading blank lines (1 in each of the above cases).

The new text extractor preserves blank lines.

Fixes #4019.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7232071

Fixes #3497.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7235075

The Unix and Plan 9 readfile call breset(b) but Windows was not,
leaving dregs in the buffer.

TBR=golang-dev
CC=golang-dev
https://golang.org/cl/7229069

If runtime's proc.c does not compile, cmd/dist used to show
the compile errors in a sea of acid output, making them impossible
to find. Change the command invocation to write the acid output
to a file, so that the errors are the only thing shown on failure.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7221082

TBR=golang-dev
CC=golang-dev
https://golang.org/cl/7241061

Updates #4734.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7228079

This CL removes the external storage of a cookie jar
and minimized the exported API as discussed in [1].

[1] https://groups.google.com/d/topic/golang-dev/ygDB3nbir00/discussion

Update #1960.

R=nigeltao
CC=golang-dev
https://golang.org/cl/7235065

R=golang-dev
CC=golang-dev
https://golang.org/cl/7249045

R=golang-dev, cookieo9, bradfitz
CC=golang-dev
https://golang.org/cl/7260043