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<!--{
"Title": "Weekly Snapshot History"
}-->
<p>This page summarizes the changes between tagged weekly snapshots of Go.
Such snapshots are no longer created. This page remains as a historical reference only.</p>
<p>For recent information, see the <a href="//golang.org/change">change log</a> and <a href="//groups.google.com/group/golang-dev/">development mailing list</a>.</p>
<h2 id="2012-03-27">2012-03-27 (<a href="release.html#go1">Go 1</a>)</h2>
<pre>
* cmd/dist: fix detection of go1 version.
* cmd/go: add missing error check (thanks Evan Shaw),
allow underscores in tool name (thanks Shenghou Ma),
bug fixes,
copy tag_test.go from goinstall,
explain versions better,
respect $GOBIN always,
update for go1 tag format.
* cmd/godoc: canonicalize custom path redirects,
fix app engine version,
use virtual filesystem to implement -templates flag.
* codewalk/sharemem.xml: fix references to files.
* crypto/tls: don't select ECC ciphersuites with no mutual curve.
* doc: add JSON-RPC: a tale of interfaces article (thanks Francisco Souza),
describe the Windows MSI installer as experimental,
link to Go Project Dashboard from package list,
update wiki tutorial templates and template discussion,
and many minor fixes.
* exp/types: generalized GCImporter API.
* go/build: cgoEnabled is not known to cmd/dist anymore (thanks Shenghou Ma),
fix import check.
* godoc: make 'Overview' section collapsible.
* misc/dist: many fixes and tweaks.
* misc/emacs: fix indentation bug.
* misc/goplay: fix error on IE8 (thanks Yasuhiro Matsumoto).
* net: ignore ECONNABORTED from syscall.Accept (thanks Devon H. O'Dell).
* os: add missing byte to FileMode buffer (thanks Stefan Nilsson).
* path/filepath: convert drive letter to upper case in windows EvalSymlinks (thanks Alex Brainman),
correct comment in EvalSymlinks (thanks Alex Brainman),
use windows GetShortPathName api to force GetLongPathName to do its work (thanks Alex Brainman),
windows drive letter cannot be a digit (thanks Alex Brainman).
* run.bash: compile the codewalks.
* runtime: restore deadlock detection in the simplest case (thanks Rémy Oudompheng),
work around false negative in deadlock detection.
* text/template: fix typo in package comment.
* windows: installer fixes (thanks Joe Poirier).
</pre>
<h2 id="2012-03-22">2012-03-22 (Go 1 Release Candidate 2)</h2>
<pre>
As with last week's snapshot, this snapshot is another Go 1 release candidate.
A notable change in this snapshot are Windows installer fixes.
Changes in this snapshot:
* 5l, 6l, 8l: fix stack split logic for stacks near default segment size.
* archive/zip: move r.zip off disk, into reader_test.go.
* build: catch API changes during build,
do more during windows build (thanks Alex Brainman),
lengthen timeout for the lengthy runtime test (thanks Shenghou Ma),
unset GOPATH before tests (thanks Shenghou Ma).
* cmd/cgo: add support for function export for gccgo (thanks Rémy Oudompheng),
fix handling of errno for gccgo.
* cmd/go: add -fno-common by default on Darwin (thanks Shenghou Ma),
don't add detail to errPrintedOutput,
fix directory->import path conversion,
make build errors more visible,
use .o, not .{5,6,8}, for gccgo created object files,
work around occasional ETXTBSY running cgo.
* cmd/godoc: add toys, tour button to playground,
inform users that the playground doesn't work via local godoc,
style example headings like links,
use *goroot as base path in zip file,
use FormatText for formating code in html template,
use shorter titles for tabs.
* cmd/gofmt: show ascii in usage (thanks Yasuhiro Matsumoto).
* cmd/pack: also recognize '\\' as path separator in filenames (thanks Shenghou Ma).
* crypto/tls: always send a Certificate message if one was requested.
* doc/install: remove reference to "Go Tutorial" (thanks Shenghou Ma).
* doc/play: use []rune instead of []int (thanks Yasuhiro Matsumoto).
* doc: add Go Concurrency Patterns: Timing out, moving on article (thanks Francisco Souza),
add Go image/draw package article and convert code snippets to Go1,
add Gobs of data article (thanks Francisco Souza),
add Godoc: documenting Go code article (thanks Francisco Souza),
add JSON and Go article (thanks Francisco Souza),
general update of gccgo installation instructions,
minor updates to most docs.
* flag: add examples.
* gc: fix struct and array comparisons for new bool rules (thanks Anthony Martin),
use quoted string format in import error,
when expanding append inline, preserve arguments.
* go/build: clarify why we exclude files starting with '_' or '.' (thanks Shenghou Ma),
clearer argument name for Import (src -> srcDir),
do not report Target for local imports,
fix match.
* go/printer, gofmt: fix multi-line logic.
* html/template: add Templates and XXXEscape functions,
fix nil pointer bug,
fix panic on Clone.
* io/ioutil: fix crash when Stat fails.
* make.bat: fix for old files (thanks Christopher Redden),
don't show error message if old generated files do not exist (thanks Shenghou Ma),
properly handle directories with spaces (thanks Alex Brainman).
* misc/cgo/gmp: update for Go 1 (thanks Shenghou Ma).
* misc/dashboard: remove old python package dashboard.
* misc/dist: don't ship cmd/cov or cmd/prof,
force modes to 0755 or 0644 in tarballs,
remove exp and old before building.
* misc/vim: restore fileencodings (thanks Yasuhiro Matsumoto).
* net/http: couple more triv.go modernizations,
ensure triv.go compiles and runs (thanks Robert Hencke).
* net: drop unnecessary type assertions and fix leak in test (thanks Mikio Hara).
* os: IsNotExist() should also consider ERROR_PATH_NOT_FOUND on Windows (thanks Shenghou Ma),
do not assume syscall.Write will write everything,
remove document duplication in error predicate functions (thanks Shenghou Ma),
return some invented data from Stat(DevNull) on windows (thanks Alex Brainman).
* path/filepath: implement Match and Glob on windows (thanks Alex Brainman).
* reflect: document PkgPath, Method, StructField,
panic if MakeSlice is given bad len/cap arguments.
* run.bat: disable test in test\bench\go1 to fix build (thanks Alex Brainman).
* runtime/cgo: darwin signal masking (thanks Mikio Hara),
linux signal masking (thanks Mikio Hara).
* runtime: do not handle signals before configuring handler,
manage stack by ourselves for badcallback on windows/amd64 (thanks Shenghou Ma),
remove unused goc2c.c (thanks Shenghou Ma).
* sort: add time complexity to doc (thanks Stefan Nilsson),
fix computation of maxDepth to avoid infinite loop (thanks Stefan Nilsson).
* spec: delete references to unsafe.Reflect,Typeof,Unreflect.
* syscall: Test SCM_CREDENTIALS, SO_PASSCRED on Linux (thanks Albert Strasheim),
add a test for passing an fd over a unix socket,
delete passfd_test.go.
* test: use testlib in a few more cases (thanks Shenghou Ma).
* text/template: fix a couple of parse bugs around identifiers,
variables do not take arguments.
</pre>
<h2 id="2012-03-13">2012-03-13 (Go 1 Release Candidate 1)</h2>
<pre>
This weekly snapshot is very close to what we expect will be the contents of
the Go 1 release. There are still a few minor documentation issues to resolve,
and a handful of bugs that should be addressed before the release, but the vast
majority of Go programs should be completely unaffected by any changes we make
between now and the full release.
If you're interested in helping us test, eager to try out Go 1, or just
curious, this weekly snapshot is the one to try. We'll issue a new App Engine
Go 1 beta SDK very soon, so if you're an App Engine user you can try it there
too.
To help us focus on any remaining bugs and avoid introducing new ones, we will
restrict our attention to critical fixes and issues marked Go1-Must in the
issue tracker. Everything non-essential will be held until after the Go 1
release is cut and in the field for a while.
Changes in this snapshot:
* archive/zip: verify CRC32s in non-streamed files,
write data descriptor signature for OS X; fix bugs reading it.
* build: build correct cmd/dist matching GOHOSTARCH (thanks Shenghou Ma),
re-enable some broken tests in run.bash (thanks Shenghou Ma),
remove some references to Make.inc etc.
use run.go for running tests.
* builder: use short test for subrepos (thanks Shenghou Ma).
* cgo, runtime: diagnose callback on non-Go thread.
* cmd/api: set compiler for all build contexts,
work on Windows again, and make gccgo files work a bit more.
* cmd/cgo: document CGO_LDFLAGS and CGO_CFLAGS,
silence const warnings.
* cmd/dist, cmd/go: move CGO_ENABLED from 'go tool dist env' to 'go env' (thanks Shenghou Ma).
* cmd/dist: fix build for Linux/ARM (thanks Shenghou Ma),
use correct hg tag for go version (thanks Alex Brainman).
* cmd/fix: add rules for net/http -> net/http/httputil renames.
* cmd/gc: allow ~ in import paths,
delete old map delete in walk,
do not confuse unexported methods of same name,
if $GOROOT_FINAL is set, rewrite file names in object files,
implement len(array) / cap(array) rule,
import path cannot start with slash on Windows (thanks Shenghou Ma),
must not inline panic, recover,
show duplicate key in error,
unnamed struct types can have methods.
* cmd/go: add -compiler,
add env command, use to fix misc/cgo/testso,
allow go get with arbitrary URLs,
allow ssh tunnelled bzr, git and svn (thanks Ingo Oeser),
always provide .exe suffix on windows (thanks Shenghou Ma),
document import path meta tag discovery in go help remote,
honor buildflags in run, test (thanks Rémy Oudompheng),
local import fixes,
make go get new.code/... work,
rebuild external test package dependencies,
respect $GOBIN always,
support -compiler for go list, fix isStale for gccgo (thanks Rémy Oudompheng).
* cmd/godoc: add support for serving templates.
fix codewalk handler (thanks Francisco Souza).
remove extra / in paths (thanks Ugorji Nwoke),
support $GOPATH, simplify file system code,
switch on +1 buttons.
* cmd/gofmt: fix race in long test (thanks Mikio Hara).
* codereview: fix for Mercurial 2.1.
* crypto/x509: allow server gated crypto in windows systemVerify (thanks Mikkel Krautz),
do not forget to free cert context (thanks Alex Brainman),
don't include empty additional primes in PKCS#1 private key,
enforce path length constraint,
new home for root fetchers; build chains using Windows API (thanks Mikkel Krautz).
* csv: clarify what a negative FieldsPerRecord means.
* database/sql: add docs about connection state, pooling,
ensure Stmts are correctly closed (thanks Gwenael Treguier),
fix double connection free on Stmt.Query error,
fix typo bug resulting in double-Prepare.
* database/sql: add ErrBadConn.
* doc/go1: template packages have changed since r60.
* doc/go_mem: init-created goroutine behavior changes for Go 1 (thanks Shenghou Ma).
* doc/gopher: flip frontpage gopher's eyes.
* doc: add "About the go command" article,
add C? Go? Cgo! article (thanks Francisco Souza),
add Go's declaration syntax article (thanks Francisco Souza),
add more gophers,
add note about import . to Go 1 compatibility notes,
several doc fixes and improvements,
update Effective Go init section,
update progs/run (thanks Shenghou Ma),
update reference gopher,
web site tweaks.
* encoding/asn1: handle UTCTime before the year 2000.
* encoding/binary: improve package comment (thanks Stefan Nilsson).
* encoding/gob: fix memory corruption.
* encoding/json: document that nil slice encodes as `null`.
* exp/wingui: moved to code.google.com/p/gowingui.
* expvar: add locking to String, and use RWMutex properly throughout,
add missing locking in String methods.
* fmt, log: stop using unicode.
* fmt: minor tweak of package doc to show headings in godoc (thanks Volker Dobler).
* go/build, cmd/go: add support for .syso files.
* go/build: add NoGoError,
add dependency test,
do not parse .syso files (thanks Alex Brainman).
* go/parser: avoid endless loop in case of internal error,
better error synchronization.
* go/printer, gofmt: nicer formatting of multi-line returns.
* go/printer: example for Fprint.
* go/scanner: better panic diagnostic.
* go spec: no known implementation differences anymore,
fix inaccuracy in type identity definition.
* io: better document WriterAt.
* misc/dashboard: remove obsolete package builder code.
* misc/dist: add source archive support,
add windows installer and zip support,
minimum target requirement is 10.6 for Darwin (thanks Shenghou Ma).
* misc/emacs: fix extra indentation after comments that end with a period.
* misc/xcode: example install of language spec for Xcode 4.x (thanks Emil Hessman).
* net, net/rpc, reflect, time: document concurrency guarantees.
* net/http: fix crash with Transport.CloseIdleConnections,
return appropriate errors from ReadRequest.
* net: add skip message to test (thanks Mikio Hara),
disable use of external listen along with other external network uses,
do not use reflect for DNS messages (thanks Rémy Oudompheng),
document ReadMsgUnix, WriteMsgUnix,
fix TestDialTimeout on windows builder,
improve server and file tests (thanks Mikio Hara),
make Dial and Listen behavior consistent across over platforms (thanks Mikio Hara),
remove dependence on bytes, fmt, strconv,
silence another epoll print,
use IANA reserved port to test dial timeout (thanks Mikio Hara).
* os: document FileInfo.Size as system-dependent for irregular files,
fix SameFile to work for directories on windows (thanks Alex Brainman).
* path/filepath/path_test.go: repair and enable TestAbs.
* path/filepath: disable AbsTest on windows,
retrieve real file name in windows EvalSymlinks (thanks Alex Brainman).
* runtime/pprof: disable test on Leopard 64-bit.
* runtime: add Compiler,
fix windows/amd64 exception handler (thanks Alex Brainman),
inline calls to notok,
move runtime.write back to C,
print error on receipt of signal on non-Go thread,
remove unused runtime·signame and runtime·newError,
try extending arena size in 32-bit allocator (thanks Rémy Oudompheng),
wait for main goroutine before setting GOMAXPROCS (thanks Rémy Oudompheng).
* strconv: add table-based isPrint, remove dependence on bytes, unicode, and strings.
* sync/atomic: disable store and load test on a single processor machine (thanks Mikio Hara).
* syscall: fix mkall.sh, mksyscall_linux.pl, and regen for Linux/ARM (thanks Shenghou Ma).
* test/run: use all available cores on ARM system (thanks Shenghou Ma).
* test: actually run them on windows (thanks Alex Brainman),
add inherited interface test to ddd.go,
enable method expression tests in ddd.go,
invoke go command in run.go,
match gccgo error messages for bug388.go,
skip . files in directory.
* testing: do not print 'no tests' when there are examples.
* time: during short test, do not bother tickers take longer than expected (thanks Shenghou Ma),
mention receiver in Unix, UnixNano docs.
* unicode/utf16: remove dependence on package unicode.
* unicode/utf8: remove dependence on unicode.
* windows: make background of gopher icon transparent (thanks Volker Dobler).
</pre>
<h2 id="2012-03-04">2012-03-04</h2>
<pre>
This snapshot includes a major re-design of the go/build package.
Its FindTree, ScanDir, Tree, and DirInfo types have been replaced with the
Import and Package types. There is no gofix. Code that uses go/build will need
to be updated manually to use the package's new interface.
Other changes:
* 6a/6l: add IMUL3Q and SHLDL.
* all: remove unused unexported functions and constants (thanks Rémy Oudompheng).
* build: add GO_ prefix to LDFLAGS and GCFLAGS (thanks Gustavo Niemeyer).
* cmd/cc: fix an out of bounds array access (thanks Anthony Martin),
grow some global arrays.
* cmd/dist: force line-buffering stdout/stderr on Unix (thanks Shenghou Ma),
recognize CC="ccache clang" as clang.
* cmd/go: avoid repeated include dirs (thanks Rémy Oudompheng),
fix -I flag for gc command (thanks Gustavo Niemeyer),
fix verbose command displaying (thanks Gustavo Niemeyer),
fixes for gccgo (thanks Rémy Oudompheng),
many fixes,
test -i should not disable -c (thanks Shenghou Ma).
* cmd/vet: don't give error for Printf("%+5.2e", x) (thanks Shenghou Ma).
* cmd/yacc/units.y: update comment, give better error messages when $GOROOT not set (thanks Shenghou Ma).
* crypto/tls: force OS X target version to 10.6 for API compatibility (thanks Mikkel Krautz).
* crypto/x509: fix typo in Verify documentation (thanks Mikkel Krautz).
* dist: treat CC as one unit (thanks Scott Lawrence).
* doc/go1: add justification discussions to major changes,
minor corrections and updates.
* doc: describe API changes to go/build,
elaborate available checks for cmd/vet (thanks Shenghou Ma),
expand code.html to discuss the go tool in more depth,
instruct FreeBSD/Linux users to rm the old version first,
remove Go for C++ Programmers,
remove roadmap document,
remove tutorial,
update codelab/wiki to Go 1 (thanks Shenghou Ma),
* encoding/gob: fix "// +build" comment for debug.go (thanks Shenghou Ma),
more hardening for lengths of input strings.
* encoding/json: drop MarshalForHTML; gofix calls to Marshal,
escape output from Marshalers.
* encoding/xml: fix anonymous field Unmarshal example (thanks Gustavo Niemeyer),
fix xml test tag usage (thanks Gustavo Niemeyer).
* gc: disallow absolute import paths,
fix escape analysis + inlining + closure bug,
fix string comparisons for new bool rules (thanks Anthony Martin),
reject import paths containing special characters (thanks Anthony Martin).
* go/ast: examples for ast.Print, ast.Inspect.
* go/doc, godoc: fix range of type declarations.
* go/parser: check import path restrictions,
expand test cases for bad import.
* go/printer, gofmt: improved comment placement.
* go/printer: fix printing of variadic function calls (thanks Anthony Martin),
fix test for new import path restrictions (thanks Anthony Martin),
replace multiline logic,
simpler exprList code, more tests.
* godoc: add Examples link to top-level index,
bring back highlighting, selections, and alerts,
consistent placement of documentation sections,
don't show directories w/o packages in flat dir mode,
don't show testdata directories,
fix codewalks.
* gotype: provide -comments flag.
* html/template: make doctype check case-insensitive (thanks Scott Lawrence),
use correct method signature in introduction example (thanks Mike Rosset).
* io: document that I/O is not necessarily safe for parallel access.
* ld: allow more -L options (thanks Shenghou Ma),
fix alignment of rodata section.
* misc: add zsh completion for go tool (thanks Rémy Oudompheng).
* misc/bash: Completion for go tool (thanks Yissakhar Z. Beck).
* misc/dashboard: fix bug in UI template,
record install counts for external packages.
* misc/dist: implement binary distribution scripts in go.
* misc/gobuilder: send commit time in RFC3339 format.
* misc/xcode: move Xcode3 specific files into sub directory.
* net/http/cgi: add an empty response test,
fix empty response.
* net/http/httptest: make Server.Close wait for outstanding requests to finish.
* net/http/httputil: fix DumpRequestOut on https URLs,
make https DumpRequestOut less racy.
* net/http: add overlooked 418 status code, per RFC 2324,
fix ProxyFromEnvironment bug, docs, add tests,
make a test more paranoid & reliable on Windows.
* net/rpc: silence read error on closing connection.
* net: add stubs for NetBSD (thanks Benny Siegert),
make -external flag for tests default to true (thanks Mikio Hara),
reorganize test files (thanks Mikio Hara).
* os: diagnose chdir error during StartProcess,
implement UserTime/SystemTime on windows (thanks Alex Brainman),
implement sameFile on windows (thanks Alex Brainman),
release process handle at the end of windows (*Process).Wait (thanks Alex Brainman),
sleep 5ms after process has exited on windows (thanks Alex Brainman).
* path/filepath: note that SplitList is different from strings.Split,
steer people away from HasPrefix.
* reflect: don't panic comparing functions in DeepEqual.
make Value.Interface return immutable data.
* runtime/pprof: support OS X CPU profiling.
* runtime: add sanity checks to the runtime-gdb.py prettyprinters,
check for ARM syscall failures (thanks Shenghou Ma),
darwin and linux signal masking,
run init on main thread,
size arena to fit in virtual address space limit.
* spec: allow disallow of \uFFFD in import path,
apply method sets, embedding to all types, not just named types,
clarifications around exports, uniqueness of identifiers,
import path implementation restriction,
inside functions, variables must be evaluated,
use the term "lexical token" (rather then "lexical symbol").
* sync: add Once example, remove old WaitGroup example.
* test/bench/shootout: update post-Makefile.
* test: add documentation, misc fixes.
* testing: add -test.example flag to control execution of examples.
* text/template: add example showing use of custom function,
add examples that use multiple templates,
fix redefinition bugs.
* time: add a comment about how to use the Duration constants.
</pre>
<h2 id="2012-02-22">2012-02-22</h2>
<pre>
This weekly snapshot includes changes to the os and runtime packages.
This should be the last of the significant incompatible changes before Go 1.
There are no longer error constants such as EINVAL in the os package, since the
set of values varied with the underlying operating system. There are new
portable functions like IsPermission to test common error properties, plus a
few new error values with more Go-like names, such as ErrPermission and
ErrNoEnv.
The os.Getenverror function has been removed. To distinguish between a
non-existent environment variable and an empty string, use os.Environ or
syscall.Getenv.
The Process.Wait method has dropped its option argument and the associated
constants are gone from the package. Also, the function Wait is gone; only the
method of the Process type persists.
The non-portable Waitmsg type has been replaced with the portable ProcessState.
Much of the API exported by package runtime has been removed in favor of
functionality provided by other packages. Code using the runtime.Type
interface or its specific concrete type implementations should now use package
reflect. Code using runtime.Semacquire or runtime.Semrelease should use
channels or the abstractions in package sync.
The runtime.Alloc, runtime.Free, and runtime.Lookup functions, an unsafe API
created for debugging the memory allocator, have no replacement.
The runtime.Cgocalls and runtime.Goroutines functions have been renamed to
runtime.NumCgoCall and runtime.NumGoroutine.
The "go fix" command will update code to accommodate most of these changes.
Other changes:
* 5c, 6c, 8c, 6g, 8g: correct boundary checking (thanks Shenghou Ma).
* 5g, 6g, 8g: flush modified globals aggressively.
* 8a, 8l: add EMMS instruction (thanks Evan Shaw).
* bufio: don't return errors from good Peeks.
* build: add make.bash --no-clean option,
improve Windows support.
* builder: reuse existing workspace if possible (thanks Shenghou Ma),
update for os.Wait changes.
* bytes: document Compare/Equal semantics for nil arguments, and add tests.
* cgo: fix definition of opaque types (thanks Gustavo Niemeyer).
* cmd/api: record return type of functions for variable typecheck (thanks Rémy Oudompheng).
* cmd/cgo: bug fixes.
* cmd/dist: add clang specific -Wno options (thanks Bobby Powers),
fix install cmd/5g on non-arm system,
fix pprof permissions (thanks Bobby Powers),
make dir check in defaulttarg() more robust (thanks Shenghou Ma),
use correct package target when cross-compiling (thanks Alex Brainman).
* cmd/gc: correctly typecheck expression lists in returns (thanks Rémy Oudompheng),
don't believe that variables mentioned 256 times are unused (thanks Rémy Oudompheng),
error on constant shift overflows (thanks Rémy Oudompheng),
fix comparison of struct with _ field.
fix error for floating-point constant %,
new, less strict bool rules.
* cmd/go: add tool -n flag,
go test -i correctly handle cgo packages (thanks Shenghou Ma).
* codereview: fix submit message for new clone URL (thanks Shenghou Ma).
* database/sql/driver: API cleanups.
* doc: many fixes and adjustments.
* encoding/gob: cache engine for user type, not base type,
catch internal error when it happens,
fix mutually recursive slices of structs.
* encoding/json: ignore anonymous fields.
* go/doc: return Examples in name order.
* go/parser: imaginary constants and ! may start an expression.
* go/printer, gofmt: improved comma placement.
* go/printer: don't lose relevant parentheses when rewriting selector expressions.
* godoc: adjust line height in pre blocks,
don't print spurious suggestion when running "go doc foo",
fix absolute->relative mapping,
fix tag mismatch validation errors (thanks Scott Lawrence),
import example code support,
support flat directory view again.
* html/template: add Clone and AddParseTree,
don't indirect past a Stringer,
minor tweak to docs to improve HTML typography.
* image: add Decode example.
* ld: add NOPTRBSS for large, pointer-free uninitialized data.
* math/rand: Intn etc. should panic if their argument is <= 0.
* misc/dist/windows: distro builder updates (thanks Joe Poirier).
* misc/goplay: remain in work directory, build in temp directory.
* net, os, syscall: delete os.EPLAN9 (thanks Mikio Hara).
* net/http: add optional Server.TLSConfig field.
* net/smtp: use EHLO then HELO.
* net/textproto: accept bad MIME headers as browsers do.
* net/url: regularise receiver names.
* net: make LocalAddr on multicast return group address (thanks Mikio Hara),
make parseProcNetIGMP more robust (thanks Mikio Hara),
more selfConnect debugging: panic if ra == nil in internetSocket,
panic if sockaddrToTCP returns nil incorrectly,
other miscellaneous fixes.
* path, path/filepath: polish documentation (thanks Rémy Oudompheng).
* pprof: add Profile type.
* runtime: avoid malloc during malloc,
define NSIG to fix plan 9 build (thanks David du Colombier),
fix FreeBSD signal handling around thread creation (thanks Devon H. O'Dell),
goroutine profile, stack dumps,
implement runtime.osyield on FreeBSD 386, amd64 (thanks Devon H. O'Dell),
permit default behaviour of SIGTSTP, SIGTTIN, SIGTTOU,
release unused memory to the OS (thanks Sébastien Paolacci),
remove an obsolete file (thanks Mikio Hara).
* spec: make all comparison results untyped bool,
refine the wording about variables in type switches,
struct comparison only compares non-blank fields.
* syscall: Make Pdeathsig type Signal in SysProcAttr on Linux (thanks Albert Strasheim),
fix bounds check in Error,
force Windows to always use US English error messages (thanks Shenghou Ma).
* test: migrated to new go-based testing framework.
* text/template: evaluate function fields.
* time: use Go distribution zoneinfo if system copy not found.
</pre>
<h2 id="2012-02-14">2012-02-14</h2>
<pre>
This release includes some package changes that require changes to client code.
The flate, gzip and zlib's NewWriterXxx functions no longer return an error.
The compiler will flag all affected code which must then be updated by hand.
The os package's Exec and Time functions were removed. Callers should use
syscall.Exec and time.Now instead. The ShellExpand function was renamed to
ExpandEnv. The NewFile function now takes a uintptr and the *File.Fd method
returns a uintptr.
The runtime package's Type type and its methods have been removed.
Use the reflect package instead.
Other changes:
* 8a, 8l: add LFENCE, MFENCE, SFENCE (thanks Darren Elwood).
* all.bat: report error code back to the gobuilder (thanks Alex Brainman).
* archive/zip: hide Write method from *Writer type.
* build: create the correct $GOTOOLDIR,
get rid of deps.bash (thanks Anthony Martin),
reject make.bash on Windows.
* builder: set $GOBUILDEXIT for Windows (thanks Alex Brainman),
* bytes: add Reader,
return error in WriteTo if buffer is not drained.
* cgo: add support for returning errno with gccgo (thanks Rémy Oudompheng).
* cmd/api: follow constant references.
* cmd/cgo: omit //line in -godefs, -cdefs output.
* cmd/dist: fixes (thanks Alex Brainman, Gustavo Niemeyer, Mikio Hara, Shenghou Ma).
* cmd/fix: warn about exp, old, deleted packages.
* cmd/gc: suspend safemode during typecheck of inlined bodies.
* cmd/go: a raft of fixes,
connect os.Stdin for go run and go tool,
go get scheme detection (thanks Daniel Krech),
respect test -timeout flag.
* cmd/vet: warn for construct 'Println(os.Stderr, ...)' (thanks Shenghou Ma).
* compress/gzip: remove dead code (thanks Alex Brainman).
* container/heap: add example.
* dashboard: add gobuilder -fail mode.
* database/sql: more tests,
remove Into from ScannerInto/ScanInto,
rename ErrTransactionFinished to ErrTxDone,
support ErrSkip in Tx.Exec (thanks Andrew Balholm),
treat pointers as nullable types as with encoding/json (thanks Andrew Pritchard).
* debug/macho: drop terrifyingly monstrous URL from package comment.
* dist: prevent recusive loop on windows when fatal() is called (thanks Daniel Theophanes).
* doc: add App Engine docs to 'learn' and 'reference' pages,
add playground.js,
new document about compatibility of releases,
update install.html for binary distros, add install-source.html.
* effective_go: use new map deletion syntax.
* encoding/binary: add Size, to replace the functionality of the old TotalSize,
another attempt to describe the type of Read and Write's data,
slices are allowed; say so.
* encoding/json: document buffering.
* encoding/xml: add support for the omitempty flag (thanks Gustavo Niemeyer).
* exp/norm: merged charinfo and decomposition tables.
* exp/types: use build.FindTree in GcImporter (thanks James Whitehead).
* flate: delete WrongValueError type.
* fmt: diagnose invalid verb applied to pointer,
scan FALSE correctly.
* gc: bug fixes, better error messages.
* go/doc: handle recursive embedded types (thanks Gary Burd),
don't lose exported consts/vars with unexported type,
treat predeclared error interface like an exported type.
* go/printer: implement SourcePos mode.
* godoc: list examples in index,
new design,
regard lone examples as "whole file" examples.
* html/template: added more words about examples and doc (thanks Bjorn Tipling).
* log/syslog: return length of data provided by the user, not length of header.
* make.bat: remove double quotes (thanks Alex Brainman).
* math: fix gamma doc, link to OEIS.
* mime: unexport some internal details.
* misc/dist: add binary distribution packaging script for linux,
new hierarchy for binary distribution packaging scripts.
* net/http: add ServeContent,
don't spin on temporary accept failure,
fix client goroutine leak with persistent connections,
fix reference to URL.RawPath in docs (thanks Bjorn Tipling),
panic on duplicate registrations,
use mtime < t+1s to check for unmodified (thanks Hong Ruiqi).
* net: avoid Shutdown during Close,
avoid TCP self-connect,
disable TestDialTimeout on Windows,
disable multicast test on Alpha GNU/Linux,
disable wild use of SO_REUSEPORT on BSD variants (thanks Mikio Hara),
enable flags on stream for multicast listeners (thanks Mikio Hara),
make use of listenerBacklog (thanks Mikio Hara),
prefer an IPv4 listen if no address given (thanks Mikio Hara).
* os/exec: add Cmd.Waitmsg.
* os/signal: revive this package.
* regexp/syntax: add package and Parse commentary.
* regexp: allow substitutions in Replace, ReplaceString.
* runtime, pprof: add profiling of thread creation.
* runtime, time: accelerate tests in short mode (thanks Rémy Oudompheng).
* runtime: exit early on OABI systems (thanks Shenghou Ma),
drop to 32 bit malloc if 64 bit will not work,
fix "SysReserve returned unaligned address" bug on 32-bit systems (thanks Shenghou Ma),
fix grsec support (thanks Gustavo Niemeyer),
on 386, fix FP control word on all threads, not just initial thread,
put lockorder before pollorder in Select memory block,
use startpanic so that only one thread handles an incoming SIGQUIT.
* spec: add forward links from 'method set' to where it gets used,
clarify implementation restrictions on untyped floats,
disallow recursive embedded interfaces,
method names must be unique,
send on closed channel counts as "proceeding",
strings are more slices than arrays.
* strconv: handle very large inputs.
* strings: add Seek and ReadAt methods to Reader.
* sync/atomic: disable hammer pointer tests on wrong size system.
* testing: let runtime catch the panic.
* text/template: refer HTML users to html/template.
* text/template/parse: deep Copy method for nodes.
* time: clean up MarshalJSON, add RFC3339 method,
use "2006-01-02 15:04:05.999999999 -0700 MST" as String format.
</pre>
<h2 id="2012-02-07">2012-02-07</h2>
<pre>
This weekly snapshot includes a re-organization of the Go tools.
Only the go, godoc, and gofmt tools are installed to $GOROOT/bin (or $GOBIN).
The remainder are installed to $GOROOT/bin/tool.
This puts the lesser-used tools (6g, cgo, govet, etc.) outside the user PATH.
Instead these tools may be called through the go tool with 'go tool command'.
For example, to vet hello.go you would type 'go tool vet hello.go'.
Type 'go tool' see the list of available tools.
With the move, some tools were given simpler names:
6cov -> cov
6nm -> nm
goapi -> api
gofix -> fix
gopack -> pack
gopprof -> pprof
govet -> vet
goyacc -> yacc
The os/signal package has been moved to exp/signal.
A new tool named 'dist' has been introduced to handle building the gc tool
chain and to bootstrap the go tool. The old build scripts and make files
have been removed.
Other changes:
* 5a, 6a, 8a, cc: check in y.tab.[ch].
* 5l, 6l, 8l, ld: remove memory leaks (thanks Shenghou Ma).
* 5l, 6l, 8l: implement -X flag.
* 5l: make -v option output less nonessential clutter (thanks Shenghou Ma),
optimize the common case in patch() (thanks Shenghou Ma).
* 8a, 8l: implement support for RDTSC instruction (thanks Shenghou Ma).
* 8g: use uintptr for local pc.
* archive/zip: support full range of FileMode flags (thanks Gustavo Niemeyer).
* bufio: remove special error type, update docs.
* build: move the "-c" flag into HOST_CFLAGS (thanks Anthony Martin),
remove unnecessary pragmas (thanks Anthony Martin).
* builder: drop recover blocks.
* bytes: API tweaks.
* cgo: accept null pointers in gccgo flavour of C.GoString (thanks Rémy Oudompheng),
print line numbers in fatal errors when relevant (thanks Rémy Oudompheng).
* cmd/dist: add GOBIN to env's output (thanks Gustavo Niemeyer),
fix bug in bsubst (thanks Alex Brainman),
fix build on openbsd (thanks Mikio Hara),
generate files for package runtime,
ignore file names beginning with . or _,
prevent race on VERSION creation (thanks Gustavo Niemeyer).
* cmd/gc: another special (%hhS) case for method names,
describe debugging flags (thanks Anthony Martin),
diagnose \ in import path,
disallow switch _ := v.(type),
don't print implicit type on struct literal in export,
fix codegen reordering for expressions involving && and ||,
use octal escapes in mkopnames (thanks Anthony Martin).
use original constant expression in error messages (thanks Rémy Oudompheng).
* cmd/go: add support for release tags via git branches (thanks Gustavo Niemeyer),
build: print import errors when invoked on files (thanks Kyle Lemons),
clean test directories as they complete,
fix error message on non-existing tools (thanks Rémy Oudompheng),
fix handling of gccgo standard library (thanks Rémy Oudompheng),
fixed panic on `go clean -n` and `go clean -x` (thanks Sanjay Menakuru),
introduce support for "go build" with gccgo (thanks Rémy Oudompheng),
make vcs command actually gather output (thanks Roger Peppe),
pass env CGO_CFLAGS to cgo (thanks Jeff Hodges),
record location of failed imports for error reporting (thanks Rémy Oudompheng).
* cmd/goapi: expand embedded interfaces.
* cmd/goinstall: remove now that 'go get' works (thanks Gustavo Niemeyer).
* cmd/ld: fix gdbscript (thanks Wei Guangjing).
* cmd/pack: change gopack to pack in error messages.
* codereview: miscellaneous fixes and improvements.
* crypto/elliptic: p224Contract could produce a non-minimal representation.
* crypto/tls: better error message when connecting to SSLv3 servers.
* crypto/x509: use case-insensitive hostname matching.
* dashboard: support for sub-repositories, update to go1beta.
* database/sql: permit scanning into interface{}.
* doc: update go1.html for recent changes.
* encoding/base32: add DecodeString and EncodeToString helper methods,
ignore new line characters during decode.
* encoding/base64: ignore new line characters during decode.
* encoding/gob: document CommonType.
* encoding/hex: canonicalize error type names.
* encoding/json: call (*T).MarshalJSON for addressable T values.
* encoding/xml: fix decoding of xml.Name with sub-elements (thanks Gustavo Niemeyer),
fix documentation for Decoder.Skip.
* exp/norm: Added some benchmarks for form-specific performance measurements,
a few minor changes in prepration for a table format change.
* expvar: revise API.
* fix: add image/{bmp,tiff} to go1pkgrename.
* flag: allow a FlagSet to not write to os.Stderr,
describe valid input for Duration flags.
* fmt: add test of NaN map keys,
fix caching bug in Scan.
* go/build: put a space between 'generated by make' and package statement,
update syslist.go package comment.
* go/doc: fix URL linking in ToHTML (thanks Gary Burd),
added error, rune to list of predeclared types,
don't lose factory functions of non-exported types,
don't show methods of exported anonymous fields,
enable AllMethods flag (and fix logic).
* go/printer: don't print incorrect programs.
* go/scanner: idiomatic receiver names.
* go/spec: update language on map types.
* go/token: remove dependency on encoding/gob.
* gob: fuzz testing, plus a fix for very large type names.
* gobuilder: use go tool to build and test sub-repositories.
* godoc: add URL mode m=methods,
diagnostic for empty FS tree,
fix identifier search,
fix redirect loop for URL "/",
provide link to subdirectories, if any,
sort list of "other packages",
update metadata in appinit.go.
* gophertool: fix link to the build status dashboard (thanks Jongmin Kim).
* hgignore: add VERSION.cache (thanks Gustavo Niemeyer),
delete dregs, ignore tmpltohtml.
* html: add package doc.
* image: add package docs, rename s/UnknownFormatError/ErrFormat/ and,
delete the image.Repeated type,
remove image/bmp and image/tiff from std.
* io/ioutil: document EOF behavior in ReadFile and ReadAll.
* io: API tweaks.
* libmach: add stubs for Plan 9 (thanks Anthony Martin).
* make.bash: don't remove hgpatch.
* math/big: add raw access to Int bits,
API and documentation cleanup.
* misc/goplay: use go tool "run" (thanks Olivier Duperray).
* misc/osx: don't set GOROOT or modify profile files,
update for dist tool, drop image.bash, update readme.
* net, syscall: add IPv4 multicast helpers for windows (thanks Mikio Hara).
* net/http/httputil: fix race in DumpRequestOut,
preserve query params in reverse proxy.
* net/http: don't set Content-Type header for HEAD requests by default (thanks Patrick Mylund Nielsen),
fix nil pointer dereference in error case (thanks Volker Dobler),
close client fd sooner on response read error,
set cookies in client jar on POST requests (thanks Volker Dobler).
* net/rpc: fix data race on Call.Error.
* net: ListenMulticastUDP to listen concurrently across multiple listeners (thanks Mikio Hara),
disable normal multicast testing on linux/arm (thanks Mikio Hara),
fix Plan 9 build (thanks Anthony Martin),
fix windows build (thanks Alex Brainman),
move DNSConfigError to a portable file,
remove types InvalidConnError and UnknownSocketError,
replace error variable name e, errno with err (thanks Mikio Hara),
run TestDialTimeout on windows (thanks Alex Brainman),
update comments to remove redundant "net" prefix (thanks Mikio Hara).
* os/exec: TestExtraFiles - close any leaked file descriptors,
make sure file is not closed early in leaked fd test.
* os/signal: move to exp/signal.
* os/user: windows implementation (thanks Alex Brainman).
* os: Process.handle use syscall.Handle (thanks Wei Guangjing),
file windows use syscall.InvalidHandle instead of -1 (thanks Wei Guangjing),
remove SIGXXX signals variables,
turn FileStat.Sys into a method on FileInfo (thanks Gustavo Niemeyer).
* path/filepath: repair and simplify the symlink test.
* reflect: add comment about Type.Field allocation,
test that PtrTo returns types that match program types.
* runtime: add runtime.cputicks() and seed fastrand with it (thanks Damian Gryski),
delete UpdateMemStats, replace with ReadMemStats(&stats) (thanks Rémy Oudompheng),
fix float64 hash,
use GOTRACEBACK to decide whether to show runtime frames,
use per-map hash seeds (thanks Damian Gryski).
* spec: add number to the fibonacci sequence.
* std: add struct field tags to untagged literals.
* strings: add Fields example.
* syscall: add Timeval.Nano, Timespec.Nano, for conversion to Duration,
cache environment variables on Plan 9 (thanks Anthony Martin),
fix // +build comments in types_*.go,
fix build directive in types_linux.go,
update bootstrap scripts to sync with new go command (thanks Mikio Hara).
* test: add import test that caused an incorrect gccgo error,
add test for receiver named _,
add test of NaN in map,
add test which crashed gccgo compiler,
don't use package main for files without a main function,
fix bug headers,
float to integer test case,
make map nan timing test more robust,
match gccgo error messages,
test append with two different named types with same element type,
test method expressions with parameters, and with import,
test slice beyond len,
test that x := <-c accepts a general expression.
* testing: capture panics, present them, and mark the test as a failure.
* unicode: document large var blocks and the SpecialCase vars.
* vet: add a check for untagged struct literals.
</pre>
<h2 id="2012-01-27">2012-01-27</h2>
<pre>
This weekly snapshot renamed the html package to exp/html. The package will not
be present in the Go 1 distribution, but will be installable from source.
Error variables in the archive/tar, archive/zip, compress/gzip, compress/zlib,
and crypto/bcrypt packages have been renamed from FooError to ErrFoo.
There is no gofix, but the compiler will flag code that needs updating.
This weekly snapshot relocates many packages to sub-repositories of the main
Go repository. These are the old and new import paths:
crypto/bcrypt code.google.com/p/go.crypto/bcrypt
crypto/blowfish code.google.com/p/go.crypto/blowfish
crypto/cast5 code.google.com/p/go.crypto/cast5
crypto/md4 code.google.com/p/go.crypto/md4
crypto/ocsp code.google.com/p/go.crypto/ocsp
crypto/openpgp code.google.com/p/go.crypto/openpgp
crypto/openpgp/armor code.google.com/p/go.crypto/openpgp/armor
crypto/openpgp/elgamal code.google.com/p/go.crypto/openpgp/elgamal
crypto/openpgp/errors code.google.com/p/go.crypto/openpgp/errors
crypto/openpgp/packet code.google.com/p/go.crypto/openpgp/packet
crypto/openpgp/s2k code.google.com/p/go.crypto/openpgp/s2k
crypto/ripemd160 code.google.com/p/go.crypto/ripemd160
crypto/twofish code.google.com/p/go.crypto/twofish
crypto/xtea code.google.com/p/go.crypto/xtea
exp/ssh code.google.com/p/go.crypto/ssh
net/dict code.google.com/p/go.net/dict
net/websocket code.google.com/p/go.net/websocket
exp/spdy code.google.com/p/go.net/spdy
encoding/git85 code.google.com/p/go.codereview/git85
patch code.google.com/p/go.codereview/patch
Gofix will update imports of these packages to use the new import paths.
Installations that depend on these packages will need to install them using a
'go get' command.
Other changes:
* 6c, 8c: make floating point code NaN-safe.
* 6l, 8l: remove unused macro definition (thanks Shenghou Ma).
* archive/tar: fix race in TestNonSeekable.
* archive/zip: add functions to convert between os.FileInfo & FileHeader.
* build: do not build all C compilers (thanks Shenghou Ma),
remove code now in subrepositories.
* bytes: remove dead code, complete documentation,
restore panic on out-of-memory,
turn buffer size overflows into errors.
* cgo: -cdefs should translate unsafe.Pointer to void * (thanks Shenghou Ma).
* cmd/gc: forgotten recursion on ninit itself in order.c.
* cmd/go: bug fixes, implement go get,
correctly handle -n and -x flags for 'go run' (thanks Shenghou Ma),
solve ambiguity of get lp.net/project/foo (thanks Gustavo Niemeyer),
update doc.go with text generated from the usage strings.
* cmd/goapi: new tool for tracking exported API over time.
* codereview: support for subrepositories.
* compress/flate: fix a typo, improve compression rate by 3-4%,
increase the length of hash table from 1<<15 to 1<<17. 0%-16% speedup,
make lazy matching work,
reduce memory pressure at cost of additional arithmetic operation,
use append instead of slice+counter.
* crypto: rename some FooError to ErrFoo.
* dashboard: fix -commit for new xml package.
* database/sql: add NullInt64, NullFloat64, NullBool (thanks James P. Cooper),
convert SQL null values to []byte as nil (thanks James P. Cooper),
fix Tx.Query (thanks Blake Mizerany).
* doc: expand FAQ on GOMAXPROCS, update to Go 1.
* doc/go1: add encoding/xml and net/url changes (thanks Gustavo Niemeyer),
add more info about hash and net changes, delete reference to html,
add flag, runtime, testing, image , mime, filepath.Walk,
document sub-repositories.
* encoding/binary: document that PutVarint, PutUvarint may panic.
* encoding/varint: deleted WriteXvarint.
* encoding/xml: add docs for ignoring tag (thanks Gustavo Niemeyer),
bring API closer to other packages (thanks Gustavo Niemeyer),
improve []byte handling (thanks Gustavo Niemeyer),
remove Marshaler support (thanks Gustavo Niemeyer),
support ignoring fields with "-" (thanks Gustavo Niemeyer).
* exp/ebnflint: test spec during 'go test'.
* exp/norm: fixes a subtle bug introduced by change 10087: random offset.
* gc, runtime: handle floating point map keys.
* gc: avoid DOT in error messages,
do not try to add a key with incorrect type to a hash (thanks Jeff R. Allen),
fix order of evaluation,
fix recursion loop in interface comparison,
handle function calls in arguments to builtin complex operations,
missed typecheck in subscripting a const string,
permit unsafe.Pointer for inlined functions,
softer criteria for inlinability,
static implements check on typeswitches only applies to concrete case types,
test case for recursive interface bug.
* go/ast: respect ImportSpec.EndPos (thanks Scott Lawrence).
* go/build: add BuildTags to Context, allow !tag.
* go/doc: rewrite and add lots of tests.
* go/parser: use explicit parser.Mode type.
* go/printer, gofmt: respect line breaks in signatures.
* go/scanner: use explicit scanner.Mode type.
* gob: annotate debug.go so it's not normally built,
reduce the maximum message size.
* godoc: log node printing error,
move overview before API TOC,
update metadata upon launch.
* gofix: add -debug flag for quicker diagnosis of internal errors,
handle xml.Unmarshal in xmlapi fix (thanks Gustavo Niemeyer),
update go1pkgrename for subrepositories.
* goyacc: fix indexing bug when yydebug >= 2.
* ld: fix Mach-O code signing for non-cgo binaries (thanks Mikkel Krautz).
* libmach: cross compiling support (thanks Shenghou Ma).
* math/big: assembly versions of bitLen for x86-64, 386, and ARM (thanks David G. Andersen),
return type of bitLen is an int; use MOVL on amd64 (thanks David G. Andersen),
add examples for Rat and Int's SetString and Scan methods,
slight improvement to algorithm used for internal bitLen function (thanks David G. Andersen),
test both bitLen and bitLen_g.
* net/http: add Request.RequestURI field,
disabled test for Transport race / deadlock bug,
fix Transport deadlock (thanks Yoshiyuki Kanno),
make ParseForm ignore unknown content types (thanks Roger Peppe),
parse CONNECT requests (thanks Andrew Balholm).
* net/rpc: fix data race in benchmark,
fix race in TestClientWriteError test,
log Call reply discard.
* net: Dial, ListenPacket with "ip:protocol" network for raw IP sockets (thanks Mikio Hara),
actually reset deadline when time is zero,
consistent OpError message (thanks Mikio Hara),
fix dialing google test (thanks Mikio Hara),
make WriteTo fail when UDPConn is already connected (thanks Mikio Hara).
* regexp: remove vestigial Error type.
* runtime: add type algorithms for zero-sized types,
move NumCPU declaration into debug.go.
* spec: function invocation, panic on *nil.
* syscall: add NOTE_* constants on OS X (thanks Robert Figueiredo).
* test: explicitly use variables to avoid gccgo "not used" error.
* text/template: add example for Template.
</pre>
<h2 id="2012-01-20">2012-01-20</h2>
<pre>
This weekly snapshot renamed the exp/sql package to database/sql, and moved
utf8.String from unicode/utf8 to exp/utf8string.
Package net's SetTimeout methods were changed to SetDeadline.
Many functions in package os now take a os.FileMode argument instead of a
plain uint32. An os.ModeSticky constant is also now defined.
The meaning of the first buffer element for image.YCbCr has changed to match
the semantics of the other image types like image.RGBA.
The NewMD5, NewSHA1 and NewSHA256 functions in crypto/hmac have been
deprecated. Use New instead, explicitly passing the hash function.
Other changes:
* buildscripts: move to buildscript directory (thanks Shenghou Ma).
* bytes: add the usual copyright notice to example_test.go (thanks Olivier Duperray).