For #59488
Change-Id: I73ee4d1d8b9d8e6f0aad9e3bb98729aaa0f06a47
Reviewed-on: https://go-review.googlesource.com/c/go/+/501697
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Fill in some of the simpler entries, leave some more TODO entries.
For #58645
Change-Id: I20eb09ba709520ab27301c568d777184a405ffdc
Reviewed-on: https://go-review.googlesource.com/c/go/+/501695
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The section on type inference has not been updated yet for Go 1.21.
Add a temporary note so that readers referred to this section from
the release notes are not confused.
Change-Id: Idc4c74d6d700f891c625289e873ad5aa9c2c5213
Reviewed-on: https://go-review.googlesource.com/c/go/+/501308
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For #15527
For #57786
Change-Id: I75ed0b4bac8e31fac2afef17dad708dc9a3d74e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/501300
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Fixes#60570.
Change-Id: I7ef834731ea26ceee5ec9b7438fdd8323aaf828e
Reviewed-on: https://go-review.googlesource.com/c/go/+/500416
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Also handle go test -c TODO.
For #15513.
For #56986.
For #57001.
Change-Id: I571ae25d8d8fcd44cb38ac16cdd2a1180016eb94
Reviewed-on: https://go-review.googlesource.com/c/go/+/500956
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The most important parts of almost any release notes are the
language and tool changes. Those should be the first two sections.
Instead Ports interrupts the flow with information that usually
matters only to very few users.
Move Ports to the end of the release notes.
Change-Id: I78492e91e368184fb5f8e8d44d63f35b8f14eeae
Reviewed-on: https://go-review.googlesource.com/c/go/+/500957
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For #58645.
Fixes#57125.
Fixes#57003.
Fixes#57004.
Change-Id: I365929ca36aeb32e9ecd19f870e70869933ba6a0
Reviewed-on: https://go-review.googlesource.com/c/go/+/500239
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The "To" prefix was a relic of the first draft
that I failed to make consistent with the unprefixed
name used in the proposal. Fortunately iant spotted
it during the API audit.
Updates #56984
Updates #60560
Change-Id: Ifa6eeddf6dd5f0637c0568e383f9a4bef88b10f9
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Change-Id: Ie84cad994c1ffb2c91ce45b2dfb9257e6a7f309b
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This change was already described in the linker section.
Change-Id: I3e36dbd66b3b53c5f0063b0d67d8773383f1f77f
Reviewed-on: https://go-review.googlesource.com/c/go/+/499817
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It reads better as a single paragraph. Also added links.
Change-Id: Id6ba54111b63fbd536423272f674e0eb64b087a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/499956
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Change-Id: Id9a8871af9cc3ac26be539877f2eea3462db6f3d
Reviewed-on: https://go-review.googlesource.com/c/go/+/499955
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Change-Id: Ibcdedb8222a80c0478f783f4a1800e472dbe062c
Reviewed-on: https://go-review.googlesource.com/c/go/+/499935
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Change-Id: I9c6fc4c7e24d0e78086d95dccd61e80bd5ddd856
Reviewed-on: https://go-review.googlesource.com/c/go/+/499815
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Change-Id: Ibc5f23f37e5bd45034771a0205eadac3072d6870
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For #59959.
For #58645.
Change-Id: I574153ef2fd61a5e90ec281fca065c42fce22cc1
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Also add a missing </a> in the preceding section.
For #53761
Change-Id: I8e64b86b5b32067f954d58cf9adf86cb4d2eeb2b
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Change-Id: I975b437240df03da84f2ce7c47f7a0097a597f25
Reviewed-on: https://go-review.googlesource.com/c/go/+/499638
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For #51676.
For #58645.
Change-Id: I9045051b5a25c6dfc833eef13e6c105a0d8ae763
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Since log/slog doesn't appear in earlier Go versions, we don't need
to document these proposals as changes.
Change-Id: Iae6ed9ca6bd22d8c46c21deece9ddedf7d739032
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For #48621
For #55079
Change-Id: I279b4fbf07d2fa9de9577559a4e17a57f5692aa3
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For #53685
Change-Id: I237297d19afeb36ad738074d0c61caa7012f65ac
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For #55107
For #56887
For #56892
Change-Id: Ibcca34c931ed3595d877c4573bba221dec66bb5a
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For #47653
Change-Id: Id44c9dba58966f43f188030a53343d890a6ffde7
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For #57803
Change-Id: I8e33f4dd3fc3071bfbf4d2848faefbe8488f5742
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For #53747
Change-Id: Ia5e2f89c1184f2dfd6d672b838b0dbb579e6c954
Reviewed-on: https://go-review.googlesource.com/c/go/+/499417
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Also document the new String methods that call them.
For #54451
Change-Id: I5cd7e0fc6c84097bba6d29c4d6012ed3c8bb1e0d
Reviewed-on: https://go-review.googlesource.com/c/go/+/499177
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For #56986
For #59033
Change-Id: I7d03fe34d418aff97a551b236b5d43506e402871
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While here, I've removed the CL 472195 TODO, which I marked as
RELNOTE=yes by mistake.
For #57441
For #57302
Change-Id: I7563140bf307f8d732f0154d02b8fa0735527323
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For #57411
Change-Id: I56c112bb03dde24c2e2643c9b72ce06158a8e717
Reviewed-on: https://go-review.googlesource.com/c/go/+/499278
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Change-Id: I98bdfe8ab338a5b92c466a5aacfa95266171e5c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/499279
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Change-Id: Ieedddf52ae09cf5a8e9347f0f30aff21e8369787
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Fix a broken HTML tag.
Change-Id: I9e7c65c2cc12c7b14ca205f78b78ac1e9c92a3ad
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Also mention errors that implement it.
For #41198
Change-Id: I4f01b112f53b19e2494b701bb012cb2cb52f8962
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For #57436
Change-Id: I99e8b0819c76f1ccf12154a894c9c4c9d68124d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/498602
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For #56539
For #59166
Change-Id: Ief392464916a1a74a8fcc6c3c7bdb213e8c6ef98
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Also move all the language changes to the same part of the release notes.
For #56351
For #57411
Change-Id: Id1c51b5eb8f7d85e61a2ae44ee7d73bb13036631
Reviewed-on: https://go-review.googlesource.com/c/go/+/498755
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Also mention WTF-8 support in the syscall package.
For #32558
For #58977
For #59971
Change-Id: Id1627889b5e498add498748d9bfc69fb58030b35
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Added Value.Clear, deprecated SliceHeader and StringHeader.
For #55002
For #56906
Change-Id: Ib7497aff830d56fad90c31ec28596e71a448e9ce
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For #46159
Change-Id: Ia9cc0827a89d362532d1a662b791de8eebbfb2fe
Reviewed-on: https://go-review.googlesource.com/c/go/+/498756
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Remove x/ repos changes that aren't part of the 1.21 release.
Change-Id: Ia5cbf02ed6c0cc4dc0ff80d68403723b3f9ae0ba
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One of the changes also affects the os package, so mention it
there too.
For #46259
Change-Id: I8041a5ce009725ab210118ee668fc94196d9ff82
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Add a short release note blurb on linker dead-coding of global map
variables.
Updates #58645.
Change-Id: Ibfdd3e2b2b78517db4245b1d7eedd5e75a643b47
Reviewed-on: https://go-review.googlesource.com/c/go/+/498575
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For #37708
Change-Id: I7b04d6331c15771c7d74ff77afd523c435e0dafe
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For #44855
Change-Id: I517394b227ea948ed3e1f9ffdaab2bb2676863c8
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For #59488.
Change-Id: Iefabb06014767c5f633082a112a81e9ff5f09a30
Reviewed-on: https://go-review.googlesource.com/c/go/+/498397
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For #57348
Change-Id: I84943711b033d63f0993133f93d9f09ce2af5965
Reviewed-on: https://go-review.googlesource.com/c/go/+/498395
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For #59488.
Change-Id: I50f65216bf02b42c1e0619702833f4a6dbed8925
Reviewed-on: https://go-review.googlesource.com/c/go/+/498136
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Put the sections for the various built-ins into alphabetical order
based on the built-in name, while keeping built-ins that belong
together together.
The order is now (captialized letter determines order):
- Append
- Clear
- Close
- Complex, real, imag
- Delete
- Len, cap
- Make
- Min, max (to be inserted here)
- New
- Panic, recover
- Print, println
There are some white space adjustments but no changes to the prose
of the moved sections.
Change-Id: Iaec509918c6bc965df3f28656374de03279bdc9e
Reviewed-on: https://go-review.googlesource.com/c/go/+/498135
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This includes release notes for several small runtime changes, including
runtime/trace and runtime package changes.
For #58645.
Change-Id: I3e9c804da1bb6b385088e16a20d9576c11098021
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Generated with relnote. I did my best to put things where they made
sense, but some weren't obvious, like the Unicode upgrade and backward
compatibility stuff.
For #58645.
Change-Id: Ic3cd9ef32cec7591ace4d2df1da40e4afd97d083
Reviewed-on: https://go-review.googlesource.com/c/go/+/496316
Auto-Submit: Heschi Kreinick <heschi@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
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Fix formatting mistakes in my previous CLs -- a missing code tag
and a broken comment tag.
Change-Id: I7f558f59b4e8fe9cb398d0093e5389b968d89eb3
Reviewed-on: https://go-review.googlesource.com/c/go/+/496115
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Auto-Submit: Cherry Mui <cherryyz@google.com>
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With CL 408826, CL 413474, etc. reflect.ValueOf no longer
unconditionally escapes its argument, allowing a Value's content
to be allocated on the stack.
Change-Id: I3a0af85c11e2fd0df42b056095565f0ce5548886
Reviewed-on: https://go-review.googlesource.com/c/go/+/494657
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"placeholder" (no space) is already used in the spec and seems to be
the preferred option.
Removed space from "place holder".
Change-Id: I9b98f62f0e3f5adb019b99f5271cc9d19abf505e
GitHub-Last-Rev: ed5aaf9d02
GitHub-Pull-Request: golang/go#59626
Reviewed-on: https://go-review.googlesource.com/c/go/+/484576
Reviewed-by: Ian Lance Taylor <iant@google.com>
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In the language specification under "Constants" the lists matching default
types to untyped contstant types is missing an Oxford comma in the first
list. I found a number of other places in the spec and #23442 that use the
Oxford comma to support its use.
Add missing Oxford comma in Constants default type list.
Change-Id: I4562d692610334bc82452db076145d2414617a04
GitHub-Last-Rev: 8acdb60d6e
GitHub-Pull-Request: golang/go#59528
Reviewed-on: https://go-review.googlesource.com/c/go/+/483555
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Fixes#59506
Change-Id: I2f8b92e93b706b061ca0eb0bd52e5cf798ce9ede
Reviewed-on: https://go-review.googlesource.com/c/go/+/483358
Reviewed-by: Ian Lance Taylor <iant@google.com>
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This change documents the new GODEBUG settings introduced for
html/template and mime/multipart, released with Go 1.19.8 and Go 1.20.3
as part of a security fix.
Updates #59153.
Updates #59234.
Change-Id: I25f4d8245da3301dccccfb44da8ff1a5985392a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/482238
Auto-Submit: Michael Knyszek <mknyszek@google.com>
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Reviewed-by: Damien Neil <dneil@google.com>
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This file is itself template input, so have to hide the template
in the go command example.
Change-Id: Ifc4eaff35ca8dc2fb479f8e28d64c06b2a9c9d3b
Reviewed-on: https://go-review.googlesource.com/c/go/+/480995
Run-TryBot: Russ Cox <rsc@golang.org>
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Reviewed-by: Bryan Mills <bcmills@google.com>
This adds the three functions from #56102 to the sync package. These
provide a convenient API for the most common uses of sync.Once.
The performance of these is comparable to direct use of sync.Once:
$ go test -run ^$ -bench OnceFunc\|OnceVal -count 20 | benchstat -row .name -col /v
goos: linux
goarch: amd64
pkg: sync
cpu: 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
│ Once │ Global │ Local │
│ sec/op │ sec/op vs base │ sec/op vs base │
OnceFunc 1.3500n ± 6% 2.7030n ± 1% +100.22% (p=0.000 n=20) 0.3935n ± 0% -70.86% (p=0.000 n=20)
OnceValue 1.3155n ± 0% 2.7460n ± 1% +108.74% (p=0.000 n=20) 0.5478n ± 1% -58.35% (p=0.000 n=20)
The "Once" column represents the baseline of how code would typically
express these patterns using sync.Once. "Global" binds the closure
returned by OnceFunc/OnceValue to global, which is how I expect these
to be used most of the time. Currently, this defeats some inlining
opportunities, which roughly doubles the cost over sync.Once; however,
it's still *extremely* fast. Finally, "Local" binds the returned
closure to a local variable. This unlocks several levels of inlining
and represents pretty much the best possible case for these APIs, but
is also unlikely to happen in practice. In principle the compiler
could recognize that the global in the "Global" case is initialized in
place and never mutated and do the same optimizations it does in the
"Local" case, but it currently does not.
Fixes#56102
Change-Id: If7355eccd7c8de7288d89a4282ff15ab1469e420
Reviewed-on: https://go-review.googlesource.com/c/go/+/451356
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Reviewed-by: Andrew Gerrand <adg@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Caleb Spare <cespare@gmail.com>
Auto-Submit: Austin Clements <austin@google.com>
Document the changes to GODEBUG implemented as
part of proposal #56986.
Fixes#56986.
Change-Id: I23153a123e23820c5b22db4767620e037bbdd083
Reviewed-on: https://go-review.googlesource.com/c/go/+/462202
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Russ Cox <rsc@golang.org>
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This is relatively easy using the new traceback iterator.
Ancestor tracebacks are now limited to 50 frames. We could keep that
at 100, but the fact that it used 100 before seemed arbitrary and
unnecessary.
Fixes#7181
Updates #54466
Change-Id: If693045881d84848f17e568df275a5105b6f1cb0
Reviewed-on: https://go-review.googlesource.com/c/go/+/475960
Run-TryBot: Austin Clements <austin@google.com>
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Reviewed-by: Michael Pratt <mpratt@google.com>
This initial release notes template is based on previous releases.
For #58645.
Change-Id: I8bae25d6dd9778a69963b8b4903a6dc1c180e15f
Reviewed-on: https://go-review.googlesource.com/c/go/+/470296
Run-TryBot: Than McIntosh <thanm@google.com>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
The typechecker already enforces this semantic, but the spec is not
updated when unsafe.{SliceData,String,StringData} were added.
Change-Id: I4ee8c564d5681b2a5fd31ff424a31bdf065d9f3b
Reviewed-on: https://go-review.googlesource.com/c/go/+/467756
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Change-Id: I5e3aca2b8fc78f38c9e2cdc67adf86d57ac85b1c
GitHub-Last-Rev: 0e5ddffe33
GitHub-Pull-Request: golang/go#58353
Reviewed-on: https://go-review.googlesource.com/c/go/+/465615
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
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Now that the development of the Go 1.20 release is almost done, its
release notes are moved to their eventual long-term home in x/website
in CL 464075. Delete the initial development copy here.
For golang/go#54202.
Change-Id: Ia402d1abd4539fbce415e2a7dffd6709186f08a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/464055
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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Long ago we decided that panic(nil) was too unlikely to bother
making a special case for purposes of recover. Unfortunately,
it has turned out not to be a special case. There are many examples
of code in the Go ecosystem where an author has written panic(nil)
because they want to panic and don't care about the panic value.
Using panic(nil) in this case has the unfortunate behavior of
making recover behave as though the goroutine isn't panicking.
As a result, code like:
func f() {
defer func() {
if err := recover(); err != nil {
log.Fatalf("panicked! %v", err)
}
}()
call1()
call2()
}
looks like it guarantees that call2 has been run any time f returns,
but that turns out not to be strictly true. If call1 does panic(nil),
then f returns "successfully", having recovered the panic, but
without calling call2.
Instead you have to write something like:
func f() {
done := false
defer func() {
if err := recover(); !done {
log.Fatalf("panicked! %v", err)
}
}()
call1()
call2()
done = true
}
which defeats nearly the whole point of recover. No one does this,
with the result that almost all uses of recover are subtly broken.
One specific broken use along these lines is in net/http, which
recovers from panics in handlers and sends back an HTTP error.
Users discovered in the early days of Go that panic(nil) was a
convenient way to jump out of a handler up to the serving loop
without sending back an HTTP error. This was a bug, not a feature.
Go 1.8 added panic(http.ErrAbortHandler) as a better way to access the feature.
Any lingering code that uses panic(nil) to abort an HTTP handler
without a failure message should be changed to use http.ErrAbortHandler.
Programs that need the old, unintended behavior from net/http
or other packages can set GODEBUG=panicnil=1 to stop the run-time error.
Uses of recover that want to detect panic(nil) in new programs
can check for recover returning a value of type *runtime.PanicNilError.
Because the new GODEBUG is used inside the runtime, we can't
import internal/godebug, so there is some new machinery to
cross-connect those in this CL, to allow a mutable GODEBUG setting.
That won't be necessary if we add any other mutable GODEBUG settings
in the future. The CL also corrects the handling of defaulted GODEBUG
values in the runtime, for #56986.
Fixes#25448.
Change-Id: I2b39c7e83e4f7aa308777dabf2edae54773e03f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/461956
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CL 444277 fixed Time.UnmarshalText and Time.UnmarshalJSON to properly
unmarshal timestamps according to RFC 3339 instead of according
to Go's bespoke time syntax that is a superset of RFC 3339.
However, this change seems to have broken an AWS S3 unit test
that relies on parsing timestamps with single digit hours.
It is unclear whether S3 emits these timestamps in production or
whether this is simply a testing artifact that has been cargo culted
across many code bases. Either way, disable strict parsing for now
and re-enable later with better GODEBUG support.
Updates #54580
Change-Id: Icced2c7f9a6b2fc06bbd9c7e90f90edce24c2306
Reviewed-on: https://go-review.googlesource.com/c/go/+/462286
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
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Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
The arena goexperiment contains code used inside Google in very
limited use cases that we will maintain, but the discussion on #51317
identified serious problems with the very idea of adding arenas to the
standard library. In particular the concept tends to infect many other
APIs in the name of efficiency, a bit like sync.Pool except more
publicly visible.
It is unclear when, if ever, we will pick up the idea and try to push
it forward into a public API, but it's not going to happen any time
soon, and we don't want users to start depending on it: it's a true
experiment and may be changed or deleted without warning.
The arena text in the release notes makes them seem more official
and supported than they really are, and we've already seen a couple
blog posts based on that erroneous belief. Delete the text to try to
set expectations better.
Change-Id: I4f6e328ac470a9cd410f5f722d0769ef62d5e5ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/462355
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Reviewed-by: Eli Bendersky <eliben@google.com>
Links under strings package were linking to the bytes versions of the functions.
Change-Id: If6ebe37fede8e417f8683695783aa767bc01e9c7
GitHub-Last-Rev: 8849285122
GitHub-Pull-Request: golang/go#57579
Reviewed-on: https://go-review.googlesource.com/c/go/+/460458
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Change-Id: Ie2e583cba9e9bec7d642e323e77fb2d9b05dc7bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/459780
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Change-Id: Ia0ce728ca18eefd835220b2076c4aa8ba00cda6d
Reviewed-on: https://go-review.googlesource.com/c/go/+/458815
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Reviewed-by: David Chase <drchase@google.com>
Change-Id: Icddf980e533b86ca955660ad028f5ad04b6aecbe
Reviewed-on: https://go-review.googlesource.com/c/go/+/457916
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Reviewed-by: Than McIntosh <thanm@google.com>
