- follow through segmented stacks
	- a couple of fixes to db

R=rsc
DELTA=72  (62 added, 0 deleted, 10 changed)
OCL=15713
CL=15717

R=r
OCL=15704
CL=15704

R=r
OCL=15699
CL=15699

R=r
OCL=15693
CL=15695

to string convert.  if the byte array has length 0,
the computation of &a[0] throws an index bounds error.

for fixed size arrays, this ends up invoking arrays2d
unnecessarily, but it works.

R=ken
DELTA=304  (44 added, 28 deleted, 232 changed)
OCL=15674
CL=15678

R=r
OCL=15675
CL=15675

R=rsc
DELTA=51  (50 added, 0 deleted, 1 changed)
OCL=15665
CL=15667

R=r
OCL=15666
CL=15666

R=r
OCL=15664
CL=15664

R=r
DELTA=348  (338 added, 0 deleted, 10 changed)
OCL=15648
CL=15660

R=r
DELTA=79  (79 added, 0 deleted, 0 changed)
OCL=15656
CL=15656

R=r
DELTA=9  (4 added, 3 deleted, 2 changed)
OCL=15655
CL=15655

R=r
DELTA=9  (7 added, 2 deleted, 0 changed)
OCL=15628
CL=15643

	- do not print tracebacks if $GOTRACEBACK=0
	- set GOTRACEBACK=0 during tests
	- filter out pc numbers in errors

R=r
DELTA=70  (22 added, 30 deleted, 18 changed)
OCL=15618
CL=15642

R=r
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=15626
CL=15641

	export.c:
		- only expose explicitly exported types to importer
		- fix behind your back
	go.h:
		- add deep() prototype (fixes 64-bit linux crash on time.go)
	go.y:
		- add a new syntax error case
	walk.c:
		- allow a,b = f() where f is func ptr (fixes bug088)

R=ken
OCL=15617
CL=15630

R=r
OCL=15627
CL=15627

R=r
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=15619
CL=15624

if y.tab.c is older than y.tab.h, make
interprets doing nothing as a failure,
because y.tab.c hasn't been updated.
so update it.

R=r
DELTA=4  (0 added, 0 deleted, 4 changed)
OCL=15615
CL=15622

R=r
OCL=15599
CL=15599

R=ken
OCL=15598
CL=15598

things to break. hopefully all fixed
now.

R=r
OCL=15597
CL=15597

R=r
OCL=15587
CL=15587

R=r
OCL=15586
CL=15586

- fixed result parsing of function types

R=r
OCL=15585
CL=15585

- clarified constants and constant expressions
- clarified type of array composite literals (fixed vs open arrays)
- clarified type of map composite literals (need to use '&' to get
  a map pointer)
- added proposal for "if-else" (TBD)
- added TODO w/ respect to "x, ok = <-ch" (and for arrays)

R=r
DELTA=51  (35 added, 0 deleted, 16 changed)
OCL=15573
CL=15575

R=r
DELTA=20  (6 added, 7 deleted, 7 changed)
OCL=15569
CL=15571

permits testing that the compiler emits error messages for
specific lines that match egrep regexps.  The desired error
messages are expressed using comments of the form
	// ERROR "regexp"

R=r
DELTA=90  (73 added, 8 deleted, 9 changed)
OCL=15513
CL=15566

also print argv(0) in default message

R=gri
DELTA=37  (21 added, 9 deleted, 7 changed)
OCL=15540
CL=15554

R=r
OCL=15539
CL=15542

use gobuild-generated Makefile for math and os.
other makefile tweaks.
move math/main.go to test/math.go

R=r
OCL=15529
CL=15537

- removed tests that may have wrong Go code from Makefile

R=r
OCL=15532
CL=15532

R=ken
DELTA=12  (12 added, 0 deleted, 0 changed)
OCL=15506
CL=15528

R=r
OCL=15518
CL=15518

- filed a bug

R=r
OCL=15517
CL=15517

- added more test cases to Makefile
- fixed another parser issue (possibly a 6g bug - to be tracked down)

R=r
OCL=15516
CL=15516

  (typo in ptr decl lead to an unresolved forward declaration)
- fixed parser bugs
- fixed Makefile
- now successfully parses most code

Issues:
- composite literals (cannot be identified easily from syntax alone)
- new(T, ...) (cannot be identified easily from syntax alone since
  new is not a keyword and thus could be a different function then
  the allocation function at which point "new((x + y))" is legal,
  but the inner "(x" looks like the beginning of a function type)

R=r
OCL=15515
CL=15515

- code scavenged from Go-in-Go front-end (will merge back)
- using "symbol-table" free parsing to build AST
- no printing yet

R=r
OCL=15504
CL=15504

do not run init on g0.

R=r
DELTA=161  (124 added, 23 deleted, 14 changed)
OCL=15490
CL=15497

R=r
DELTA=0  (0 added, 0 deleted, 0 changed)
OCL=15492
CL=15494