const foo = []int{1,2}

x.go:3: expression must be a constant

instead of

x.go:3: fatal error: gettype: addtop

R=ken
OCL=30767
CL=30767

wreck.mtv=; cat x.go
package main
var x = string.Split()
wreck.mtv=; 6g x.go
x.go:2: type string used as expression
x.go:2: undefined DOT Split on string
x.go:3: illegal types for operand: AS
	undefined
wreck.mtv=;

BUG=1938751
R=ken
OCL=30766
CL=30766

func foo(y) { }

was:
x.go:2: NONAME-y G0 u(1) a(1) l(77) x(-1000000000) is not a type

now:
x.go:2: y is not a type

R=ken
OCL=30764
CL=30764

new flag -A enables it during mkbuiltin.
avoids mysterious errors in programs
that refer to any accidentally.

R=ken
OCL=30763
CL=30763

TBR=r
OCL=30757
CL=30757

R=ken
OCL=30593
CL=30756

won't submit unless 30586 goes in.

R=r
DELTA=94  (65 added, 16 deleted, 13 changed)
OCL=30592
CL=30755

Allow indexing of string type, but not pointer to string type.
Do not allow indexing of pointer to map type.

R=r
DELTA=18  (14 added, 0 deleted, 4 changed)
OCL=30586
CL=30754

R=r
DELTA=40  (30 added, 2 deleted, 8 changed)
OCL=30742
CL=30753

R=r
DELTA=19  (0 added, 19 deleted, 0 changed)
OCL=30739
CL=30751

goroutine. arm only.

R=rsc
APPROVED=rsc
DELTA=5  (3 added, 2 deleted, 0 changed)
OCL=30644
CL=30746

R=rsc
APPROVED=rsc
DELTA=976  (164 added, 237 deleted, 575 changed)
OCL=30705
CL=30743

TBR=r
OCL=30741
CL=30741

R=r
DELTA=32  (0 added, 3 deleted, 29 changed)
OCL=30718
CL=30725

R=rsc
APPROVED=r
DELTA=131  (39 added, 10 deleted, 82 changed)
OCL=30669
CL=30723

R=r
OCL=30719
CL=30719

R=austin
DELTA=352  (67 added, 196 deleted, 89 changed)
OCL=30694
CL=30713

and return the number of bytes copied.

R=r
DELTA=18  (6 added, 0 deleted, 12 changed)
OCL=30693
CL=30712

R=rsc
APPROVED=rsc
DELTA=8  (0 added, 0 deleted, 8 changed)
OCL=30692
CL=30695

R=rsc
APPROVED=rsc
DELTA=722  (722 added, 0 deleted, 0 changed)
OCL=30660
CL=30691

Request".
Use chunked Transfer-Encoding for all POSTs.
Implement chunked reading.
Change http.Request.write to be HTTP/1.1 only.

R=rsc
APPROVED=rsc
DELTA=178  (123 added, 26 deleted, 29 changed)
OCL=30563
CL=30673

R=r
DELTA=69  (37 added, 3 deleted, 29 changed)
OCL=30661
CL=30667

errors introduced in CL 30601

R=austin
DELTA=6  (3 added, 0 deleted, 3 changed)
OCL=30663
CL=30665

do not bother warning about marks left
on stack after syntax errors.

leave OCONV nodes in tree to avoid type errors
arising from multiple walks.

R=ken
OCL=30639
CL=30662

R=rsc
DELTA=7  (5 added, 0 deleted, 2 changed)
OCL=30657
CL=30659

R=rsc
DELTA=9  (0 added, 0 deleted, 9 changed)
OCL=30658
CL=30658

- morestack and gosave/gogo/gocall support
- memclr and memset from inferno
- bugfixes in _rt0_arm

R=rsc
APPROVED=rsc
DELTA=304  (174 added, 36 deleted, 94 changed)
OCL=30636
CL=30642

R=rsc
DELTA=61  (48 added, 0 deleted, 13 changed)
OCL=30616
CL=30619

so implement the check manually.
sigh.

R=r
DELTA=17  (6 added, 0 deleted, 11 changed)
OCL=30606
CL=30612

because Url.Path already starts with one.
Avoid crashing in Request.ParseForm if there is no body.

R=rsc
APPROVED=rsc
DELTA=5  (4 added, 0 deleted, 1 changed)
OCL=30552
CL=30607

R=r
DELTA=7  (6 added, 0 deleted, 1 changed)
OCL=30596
CL=30605

R=rsc
DELTA=6  (1 added, 3 deleted, 2 changed)
OCL=30604
CL=30604

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=30599
CL=30602

R=r
DELTA=19  (3 added, 1 deleted, 15 changed)
OCL=30591
CL=30601

old:
	CONSTANTS
	const (
	    MissingKind = iota;
	  )
new:
	CONSTANTS

	const (
	    MissingKind = iota;
	 )

R=gri,rsc
DELTA=4  (4 added, 0 deleted, 0 changed)
OCL=30362
CL=30598

R=rsc
APPROVED=rsc
DELTA=5  (5 added, 0 deleted, 0 changed)
OCL=30587
CL=30595

in cap, len, [], and range on maps, strings, and slices.

R=r
DELTA=57  (2 added, 12 deleted, 43 changed)
OCL=30549
CL=30590

remove io.ErrEOF.
rename io.FullRead to io.ReadFull, to match
   ReadAtLeast and ReadAll.
remove io.FullReader, because it is now unused.

R=r
DELTA=295  (88 added, 105 deleted, 102 changed)
OCL=30544
CL=30588

better error handling throughout.

R=r,rsc
APPROVED=r
DELTA=254  (201 added, 3 deleted, 50 changed)
OCL=30515
CL=30545

R=rsc
OCL=30542
CL=30542