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For #39444 For #40700 Fixes #42908 Change-Id: Idae35adecd79e9d7d207f9d78cb009a980e5c8a9 Reviewed-on: https://go-review.googlesource.com/c/go/+/274477 Trust: Tobias Klauser <tobias.klauser@gmail.com> Reviewed-by: Russ Cox <rsc@golang.org>
758 lines
30 KiB
HTML
758 lines
30 KiB
HTML
<!--{
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"Title": "Go 1.16 Release Notes",
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"Path": "/doc/go1.16"
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}-->
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<!--
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NOTE: In this document and others in this directory, the convention is to
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set fixed-width phrases with non-fixed-width spaces, as in
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<code>hello</code> <code>world</code>.
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Do not send CLs removing the interior tags from such phrases.
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-->
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<style>
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main ul li { margin: 0.5em 0; }
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</style>
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<h2 id="introduction">DRAFT RELEASE NOTES — Introduction to Go 1.16</h2>
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<p>
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<strong>
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Go 1.16 is not yet released. These are work-in-progress
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release notes. Go 1.16 is expected to be released in February 2021.
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</strong>
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</p>
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<h2 id="language">Changes to the language</h2>
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<p>
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TODO
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</p>
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<h2 id="ports">Ports</h2>
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<h3 id="darwin">Darwin</h3>
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<p><!-- golang.org/issue/38485, golang.org/issue/41385, CL 266373, more CLs -->
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Go 1.16 adds support of 64-bit ARM architecture on macOS (also known as
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Apple Silicon) with <code>GOOS=darwin</code>, <code>GOARCH=arm64</code>.
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Like the <code>darwin/amd64</code> port, the <code>darwin/arm64</code>
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port supports cgo, internal and external linking, <code>c-archive</code>,
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<code>c-shared</code>, and <code>pie</code> build modes, and the race
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detector.
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</p>
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<p><!-- CL 254740 -->
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The iOS port, which was previously <code>darwin/arm64</code>, is now
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moved to <code>ios/arm64</code>. <code>GOOS=ios</code> implies the
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<code>darwin</code> build tag, just as <code>GOOS=android</code>
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implies the <code>linux</code> build tag.
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</p>
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<p><!-- golang.org/issue/42100, CL 263798 -->
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The <code>ios/amd64</code> port is added, targetting the iOS simulator
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running on AMD64-based macOS.
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</p>
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<h3 id="netbsd">NetBSD</h3>
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<p><!-- golang.org/issue/30824 -->
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Go now supports the 64-bit ARM architecture on NetBSD (the
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<code>netbsd/arm64</code> port).
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</p>
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<h3 id="386">386</h3>
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<p><!-- golang.org/issue/40255, golang.org/issue/41848, CL 258957, and CL 260017 -->
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As <a href="go1.15#386">announced</a> in the Go 1.15 release notes,
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Go 1.16 drops support for x87 mode compilation (<code>GO386=387</code>).
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Support for non-SSE2 processors is now available using soft float
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mode (<code>GO386=softfloat</code>).
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Users running on non-SSE2 processors should replace <code>GO386=387</code>
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with <code>GO386=softfloat</code>.
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</p>
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<h2 id="tools">Tools</h2>
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<p>
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TODO
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</p>
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<h3 id="go-command">Go command</h3>
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<h4 id="modules">Modules</h4>
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<p><!-- golang.org/issue/41330 -->
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Module-aware mode is enabled by default, regardless of whether a
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<code>go.mod</code> file is present in the current working directory or a
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parent directory. Specifically, the <code>GO111MODULE</code> environment
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variable now defaults to <code>on</code>. To switch to the previous behavior,
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set <code>GO111MODULE</code> to <code>auto</code>.
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</p>
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<p><!-- golang.org/issue/40728 -->
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Build commands like <code>go</code> <code>build</code> and <code>go</code>
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<code>test</code> no longer modify <code>go.mod</code> and <code>go.sum</code>
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by default. Instead, they report an error if a module requirement or checksum
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needs to be added or updated (as if the <code>-mod=readonly</code> flag were
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used). Module requirements and sums may be adjusted with <code>go</code>
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<code>mod</code> <code>tidy</code> or <code>go</code> <code>get</code>.
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</p>
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<p><!-- golang.org/issue/40276 -->
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<code>go</code> <code>install</code> now accepts arguments with
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version suffixes (for example, <code>go</code> <code>install</code>
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<code>example.com/cmd@v1.0.0</code>). This causes <code>go</code>
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<code>install</code> to build and install packages in module-aware mode,
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ignoring the <code>go.mod</code> file in the current directory or any parent
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directory, if there is one. This is useful for installing executables without
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affecting the dependencies of the main module.
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</p>
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<p><!-- golang.org/issue/40276 -->
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<code>go</code> <code>install</code>, with or without a version suffix (as
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described above), is now the recommended way to build and install packages in
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module mode. <code>go</code> <code>get</code> should be used with the
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<code>-d</code> flag to adjust the current module's dependencies without
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building packages, and use of <code>go</code> <code>get</code> to build and
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install packages is deprecated. In a future release, the <code>-d</code> flag
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will always be enabled.
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</p>
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<p><!-- golang.org/issue/24031 -->
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<code>retract</code> directives may now be used in a <code>go.mod</code> file
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to indicate that certain published versions of the module should not be used
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by other modules. A module author may retract a version after a severe problem
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is discovered or if the version was published unintentionally.<br>
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</p>
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<p><!-- golang.org/issue/26603 -->
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The <code>go</code> <code>mod</code> <code>vendor</code>
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and <code>go</code> <code>mod</code> <code>tidy</code> subcommands now accept
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the <code>-e</code> flag, which instructs them to proceed despite errors in
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resolving missing packages.
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</p>
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<p><!-- golang.org/issue/36465 -->
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The <code>go</code> command now ignores requirements on module versions
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excluded by <code>exclude</code> directives in the main module. Previously,
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the <code>go</code> command used the next version higher than an excluded
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version, but that version could change over time, resulting in
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non-reproducible builds.
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</p>
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<h4 id="go-test"><code>go</code> <code>test</code></h4>
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<p><!-- golang.org/issue/29062 -->
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When using <code>go</code> <code>test</code>, a test that
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calls <code>os.Exit(0)</code> during execution of a test function
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will now be considered to fail.
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This will help catch cases in which a test calls code that calls
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<code>os.Exit(0)</code> and thereby stops running all future tests.
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If a <code>TestMain</code> function calls <code>os.Exit(0)</code>
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that is still considered to be a passing test.
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</p>
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<p><!-- golang.org/issue/39484 -->
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<code>go</code> <code>test</code> reports an error when the <code>-c</code>
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or <code>-i</code> flags are used together with unknown flags. Normally,
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unknown flags are passed to tests, but when <code>-c</code> or <code>-i</code>
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are used, tests are not run.
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</p>
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<h4 id="go-get"><code>go</code> <code>get</code></h4>
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<p><!-- golang.org/issue/37519 -->
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The <code>go</code> <code>get</code> <code>-insecure</code> flag is
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deprecated and will be removed in a future version. This flag permits
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fetching from repositories and resolving custom domains using insecure
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schemes such as HTTP, and also bypassess module sum validation using the
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checksum database. To permit the use of insecure schemes, use the
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<code>GOINSECURE</code> environment variable instead. To bypass module
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sum validation, use <code>GOPRIVATE</code> or <code>GONOSUMDB</code>.
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See <code>go</code> <code>help</code> <code>environment</code> for details.
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</p>
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<p><!-- golang.org/cl/263267 -->
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<code>go</code> <code>get</code> <code>example.com/mod@patch</code> now
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requires that some version of <code>example.com/mod</code> already be
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required by the main module.
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(However, <code>go</code> <code>get</code> <code>-u=patch</code> continues
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to patch even newly-added dependencies.)
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</p>
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<h4 id="govcs"><code>GOVCS</code> environment variable</h4>
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<p><!-- golang.org/issue/266420 -->
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<code>GOVCS</code> is a new environment variable that limits which version
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control tools the <code>go</code> command may use to download source code.
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This mitigates security issues with tools that are typically used in trusted,
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authenticated environments. By default, <code>git</code> and <code>hg</code>
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may be used to download code from any repository. <code>svn</code>,
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<code>bzr</code>, and <code>fossil</code> may only be used to download code
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from repositories with module paths or package paths matching patterns in
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the <code>GOPRIVATE</code> environment variable. See
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<a href="/cmd/go/#hdr-Controlling_version_control_with_GOVCS"><code>go</code>
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<code>help</code> <code>vcs</code></a> for details.
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</p>
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<h4 id="all-pattern">The <code>all</code> pattern</h4>
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<p><!-- golang.org/cl/240623 -->
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When the main module's <code>go.mod</code> file
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declares <code>go</code> <code>1.16</code> or higher, the <code>all</code>
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package pattern now matches only those packages that are transitively imported
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by a package or test found in the main module. (Packages imported by <em>tests
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of</em> packages imported by the main module are no longer included.) This is
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the same set of packages retained
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by <code>go</code> <code>mod</code> <code>vendor</code> since Go 1.11.
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</p>
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<h4 id="toolexec">The <code>-toolexec</code> build flag</h4>
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<p><!-- golang.org/cl/263357 -->
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When the <code>-toolexec</code> build flag is specified to use a program when
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invoking toolchain programs like compile or asm, the environment variable
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<code>TOOLEXEC_IMPORTPATH</code> is now set to the import path of the package
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being built.
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</p>
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<h4 id="i-flag">The <code>-i</code> build flag</h4>
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<p><!-- golang.org/issue/41696 -->
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The <code>-i</code> flag accepted by <code>go</code> <code>build</code>,
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<code>go</code> <code>install</code>, and <code>go</code> <code>test</code> is
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now deprecated. The <code>-i</code> flag instructs the <code>go</code> command
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to install packages imported by packages named on the command line. Since
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the build cache was introduced in Go 1.10, the <code>-i</code> flag no longer
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has a significant effect on build times, and it causes errors when the install
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directory is not writable.
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</p>
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<h4 id="list-buildid">The <code>list</code> command</h4>
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<p><!-- golang.org/cl/263542 -->
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When the <code>-export</code> flag is specified, the <code>BuildID</code>
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field is now set to the build ID of the compiled package. This is equivalent
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to running <code>go</code> <code>tool</code> <code>buildid</code> on
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<code>go</code> <code>list</code> <code>-exported</code> <code>-f</code> <code>{{.Export}</code>,
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but without the extra step.
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</p>
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<h3 id="cgo">Cgo</h3>
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<p><!-- CL 252378 -->
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The <a href="/cmd/cgo">cgo</a> tool will no longer try to translate
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C struct bitfields into Go struct fields, even if their size can be
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represented in Go. The order in which C bitfields appear in memory
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is implementation dependent, so in some cases the cgo tool produced
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results that were silently incorrect.
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</p>
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<h3 id="vet">Vet</h3>
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<p>
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TODO
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<!-- CL 235677: https://golang.org/cl/235677: cmd/vet: bring in pass to catch invalid uses of testing.T in goroutines -->
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</p>
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<h2 id="runtime">Runtime</h2>
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<p>
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TODO
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</p>
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<p><!-- CL 267100 -->
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On Linux, the runtime now defaults to releasing memory to the
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operating system promptly (using <code>MADV_DONTNEED</code>), rather
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than lazily when the operating system is under memory pressure
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(using <code>MADV_FREE</code>). This means process-level memory
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statistics like RSS will more accurately reflect the amount of
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physical memory being used by Go processes. Systems that are
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currently using <code>GODEBUG=madvdontneed=1</code> to improve
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memory monitoring behavior no longer need to set this environment
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variable.
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</p>
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<h2 id="compiler">Compiler</h2>
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<p>
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TODO
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</p>
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<h2 id="linker">Linker</h2>
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<p><!-- CL 248197 -->
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This release includes additional improvements to the Go linker,
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reducing linker resource usage (both time and memory) and improving
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code robustness/maintainability. These changes form the second half
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of a two-release project to
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<a href="https://golang.org/s/better-linker">modernize the Go
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linker</a>.
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</p>
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<p>
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The linker changes in 1.16 extend the 1.15 improvements to all
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supported architecture/OS combinations (the 1.15 performance improvements
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were primarily focused on <code>ELF</code>-based OSes and
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<code>amd64</code> architectures). For a representative set of
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large Go programs, linking is 20-35% faster than 1.15 and requires
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5-15% less memory on average for <code>linux/amd64</code>, with larger
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improvements for other architectures and OSes.
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</p>
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<p>
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TODO: update with final numbers later in the release.
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</p>
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<p><!-- CL 255259 -->
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On Windows, <code>go build -buildmode=c-shared</code> now generates Windows
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ASLR DLLs by default. ASLR can be disabled with <code>--ldflags=-aslr=false</code>.
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</p>
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<h2 id="library">Core library</h2>
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<p>
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TODO: mention significant additions like new packages (<code>io/fs</code>),
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new proposal-scoped features (<code>//go:embed</code>), and so on
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</p>
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<p>
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TODO: when the "Minor changes to the library" section is close to completion,
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decide if any changes are worth factoring out and highlighting in "Core library"
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</p>
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<h3 id="minor_library_changes">Minor changes to the library</h3>
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<p>
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As always, there are various minor changes and updates to the library,
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made with the Go 1 <a href="/doc/go1compat">promise of compatibility</a>
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in mind.
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</p>
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<p>
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TODO: complete this section, resolve TODOs below, add missing entries
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</p>
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<dl id="crypto/dsa"><dt><a href="/pkg/crypto/dsa/">crypto/dsa</a></dt>
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<dd>
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<p><!-- CL 257939 -->
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The <a href="/pkg/crypto/dsa/"><code>crypto/dsa</code></a> package is now deprecated.
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See <a href="https://golang.org/issue/40337">issue #40337</a>.
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</p>
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</dd>
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</dl><!-- crypto/dsa -->
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<dl id="crypto/hmac"><dt><a href="/pkg/crypto/hmac/">crypto/hmac</a></dt>
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<dd>
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<p><!-- CL 261960 -->
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<a href="/pkg/crypto/hmac/#New">New</a> will now panic if separate calls to
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the hash generation function fail to return new values. Previously, the
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behavior was undefined and invalid outputs were sometimes generated.
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</p>
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</dd>
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</dl><!-- crypto/hmac -->
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<dl id="crypto/tls"><dt><a href="/pkg/crypto/tls/">crypto/tls</a></dt>
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<dd>
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<p><!-- CL 256897 -->
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I/O operations on closing or closed TLS connections can now be detected using
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the new <a href="/pkg/net/#ErrClosed">ErrClosed</a> error. A typical use
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would be <code>errors.Is(err, net.ErrClosed)</code>. In earlier releases
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the only way to reliably detect this case was to match the string returned
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by the <code>Error</code> method with <code>"tls: use of closed connection"</code>.
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</p>
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<p><!-- CL 266037 -->
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A default deadline is set in <a href="/pkg/crypto/tls/#Conn.Close">Close</a>
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before sending the close notify alert, in order to prevent blocking
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indefinitely.
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</p>
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<p><!-- CL 246338 -->
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<a href="/pkg/crypto/tls#Conn.HandshakeContext">(*Conn).HandshakeContext</a> was added to
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allow the user to control cancellation of an in-progress TLS Handshake.
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The context provided is propagated into the
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<a href="/pkg/crypto/tls#ClientHelloInfo">ClientHelloInfo</a>
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and <a href="/pkg/crypto/tls#CertificateRequestInfo">CertificateRequestInfo</a>
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structs and accessible through the new
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<a href="/pkg/crypto/tls#ClientHelloInfo.Context">(*ClientHelloInfo).Context</a>
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and
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<a href="/pkg/crypto/tls#CertificateRequestInfo.Context">
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(*CertificateRequestInfo).Context
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</a> methods respectively. Canceling the context after the handshake has finished
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has no effect.
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</p>
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<p><!-- CL 239748 -->
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Clients now ensure that the server selects
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<a href="/pkg/crypto/tls/#ConnectionState.NegotiatedProtocol">
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an ALPN protocol</a> from
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<a href="/pkg/crypto/tls/#Config.NextProtos">
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the list advertised by the client</a>.
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</p>
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<p><!-- CL 262857 -->
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TLS servers will now prefer other AEAD cipher suites (such as ChaCha20Poly1305)
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over AES-GCM cipher suites if either the client or server doesn't have AES hardware
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support, unless the application set both
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<a href="/pkg/crypto/tls/#Config.PreferServerCipherSuites"><code>Config.PreferServerCipherSuites</code></a>
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and <a href="/pkg/crypto/tls/#Config.CipherSuites"><code>Config.CipherSuites</code></a>
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or there are no other AEAD cipher suites supported.
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The client is assumed not to have AES hardware support if it does not signal a
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preference for AES-GCM cipher suites.
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</p>
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<p><!-- CL 246637 -->
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<a href="/pkg/crypto/tls/#Config.Clone"><code>Config.Clone</code></a> now returns
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a nil <code>*Config</code> if the source is nil, rather than panicking.
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</p>
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</dd>
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</dl><!-- crypto/tls -->
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<dl id="crypto/x509"><dt><a href="/pkg/crypto/x509/">crypto/x509</a></dt>
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<dd>
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<p><!-- CL 235078 -->
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<a href="/pkg/crypto/x509/#ParseCertificate">ParseCertificate</a> and
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<a href="/pkg/crypto/x509/#CreateCertificate">CreateCertificate</a> both
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now enforce string encoding restrictions for the fields <code>DNSNames</code>,
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<code>EmailAddresses</code>, and <code>URIs</code>. These fields can only
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contain strings with characters within the ASCII range.
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</p>
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<p><!-- CL 259697 -->
|
|
<a href="/pkg/crypto/x509/#CreateCertificate">CreateCertificate</a> now
|
|
verifies the generated certificate's signature using the signer's
|
|
public key. If the signature is invalid, an error is returned, instead
|
|
of a malformed certificate.
|
|
</p>
|
|
|
|
<p><!-- CL 233163 -->
|
|
A number of additional fields have been added to the
|
|
<a href="/pkg/crypto/x509/#CertificateRequest">CertificateRequest</a> type.
|
|
These fields are now parsed in <a href="/pkg/crypto/x509/#ParseCertificateRequest">ParseCertificateRequest</a>
|
|
and marshalled in <a href="/pkg/crypto/x509/#CreateCertificateRequest">CreateCertificateRequest</a>.
|
|
</p>
|
|
|
|
<p><!-- CL 257939 -->
|
|
DSA signature verification is no longer supported. Note that DSA signature
|
|
generation was never supported.
|
|
See <a href="https://golang.org/issue/40337">issue #40337</a>.
|
|
</p>
|
|
|
|
<p><!-- CL 257257 -->
|
|
On Windows, <a href="/pkg/crypto/x509/#Certificate.Verify"><code>Certificate.Verify</code></a>
|
|
will now return all certificate chains that are built by the platform
|
|
certificate verifier, instead of just the highest ranked chain.
|
|
</p>
|
|
|
|
<p><!-- CL 262343 -->
|
|
TODO: <a href="https://golang.org/cl/262343">https://golang.org/cl/262343</a>: add Unwrap to SystemRootsError
|
|
</p>
|
|
</dd>
|
|
</dl><!-- crypto/x509 -->
|
|
|
|
<dl id="encoding/asn1"><dt><a href="/pkg/encoding/asn1">encoding/asn1</a></dt>
|
|
<dd>
|
|
<p><!-- CL 255881 -->
|
|
<a href="/pkg/encoding/asn1/#Unmarshal">Unmarshal</a> and
|
|
<a href="/pkg/encoding/asn1/#UnmarshalWithParams">UnmarshalWithParams</a>
|
|
now return an error instead of panic when the argument is not
|
|
a pointer or is nil. This change matches the behavior of other
|
|
encoding packages such as <a href="/pkg/encoding/json">encoding/json</a>.
|
|
</p>
|
|
</dd>
|
|
</dl>
|
|
|
|
<dl id="encoding/json"><dt><a href="/pkg/encoding/json/">encoding/json</a></dt>
|
|
<dd>
|
|
<p><!-- CL 234818 -->
|
|
The <code>json</code> struct field tags understood by
|
|
<a href="/pkg/encoding/json/#Marshal"><code>Marshal</code></a>,
|
|
<a href="/pkg/encoding/json/#Unmarshal"><code>Unmarshal</code></a>,
|
|
and related functionality now permit semicolon characters within
|
|
a JSON object name for a Go struct field.
|
|
</p>
|
|
</dd>
|
|
</dl><!-- encoding/json -->
|
|
|
|
<dl id="encoding/xml"><dt><a href="/pkg/encoding/xml/">encoding/xml</a></dt>
|
|
<dd>
|
|
<p><!-- CL 264024 -->
|
|
The encoder has always taken care to avoid using namespace prefixes
|
|
beginning with <code>xml</code>, which are reserved by the XML
|
|
specification.
|
|
Now, following the specification more closely, that check is
|
|
case-insensitive, so that prefixes beginning
|
|
with <code>XML</code>, <code>XmL</code>, and so on are also
|
|
avoided.
|
|
</p>
|
|
</dd>
|
|
</dl><!-- encoding/xml -->
|
|
|
|
<dl id="flag"><dt><a href="/pkg/flag/">flag</a></dt>
|
|
<dd>
|
|
<p><!-- CL 240014 -->
|
|
TODO: <a href="https://golang.org/cl/240014">https://golang.org/cl/240014</a>: add Func
|
|
</p>
|
|
</dd>
|
|
</dl><!-- flag -->
|
|
|
|
<dl id="io"><dt><a href="/pkg/io/">io</a></dt>
|
|
<dd>
|
|
<p><!-- CL 261577 -->
|
|
TODO: <a href="https://golang.org/cl/261577">https://golang.org/cl/261577</a>: add a new ReadSeekCloser interface
|
|
</p>
|
|
</dd>
|
|
</dl><!-- io -->
|
|
|
|
<dl id="log"><dt><a href="/pkg/log/">log</a></dt>
|
|
<dd>
|
|
<p><!-- CL 264460 -->
|
|
TODO: <a href="https://golang.org/cl/264460">https://golang.org/cl/264460</a>: expose std via new Default function
|
|
</p>
|
|
</dd>
|
|
</dl><!-- log -->
|
|
|
|
<dl id="log/syslog"><dt><a href="/pkg/log/syslog/">log/syslog</a></dt>
|
|
<dd>
|
|
<p><!-- CL 264297 -->
|
|
TODO: <a href="https://golang.org/cl/264297">https://golang.org/cl/264297</a>: set local to true if network is any of "unix", or "unixgram"
|
|
</p>
|
|
</dd>
|
|
</dl><!-- log/syslog -->
|
|
|
|
<dl id="mime/multipart"><dt><a href="/pkg/mime/multipart/">mime/multipart</a></dt>
|
|
<dd>
|
|
<p><!-- CL 247477 -->
|
|
TODO: <a href="https://golang.org/cl/247477">https://golang.org/cl/247477</a>: return overflow errors in Reader.ReadForm
|
|
</p>
|
|
</dd>
|
|
</dl><!-- mime/multipart -->
|
|
|
|
<dl id="net"><dt><a href="/pkg/net/">net</a></dt>
|
|
<dd>
|
|
<p><!-- CL 250357 -->
|
|
The case of I/O on a closed network connection, or I/O on a network
|
|
connection that is closed before any of the I/O completes, can now
|
|
be detected using the new <a href="/pkg/net/#ErrClosed">ErrClosed</a> error.
|
|
A typical use would be <code>errors.Is(err, net.ErrClosed)</code>.
|
|
In earlier releases the only way to reliably detect this case was to
|
|
match the string returned by the <code>Error</code> method
|
|
with <code>"use of closed network connection"</code>.
|
|
</p>
|
|
|
|
<p><!-- CL 255898 -->
|
|
In previous Go releases the default TCP listener backlog size on Linux systems,
|
|
set by <code>/proc/sys/net/core/somaxconn</code>, was limited to a maximum of <code>65535</code>.
|
|
On Linux kernel version 4.1 and above, the maximum is now <code>4294967295</code>.
|
|
</p>
|
|
|
|
<p><!-- CL 238629 -->
|
|
TODO: <a href="https://golang.org/cl/238629">https://golang.org/cl/238629</a>: prefer /etc/hosts over DNS when no /etc/nsswitch.conf is present
|
|
</p>
|
|
</dd>
|
|
</dl><!-- net -->
|
|
|
|
<dl id="net/http"><dt><a href="/pkg/net/http/">net/http</a></dt>
|
|
<dd>
|
|
<p><!-- CL 233637 -->
|
|
In the <a href="/pkg/net/http/"><code>net/http</code></a> package, the
|
|
behavior of <a href="/pkg/net/http/#StripPrefix"><code>StripPrefix</code></a>
|
|
has been changed to strip the prefix from the request URL's
|
|
<code>RawPath</code> field in addition to its <code>Path</code> field.
|
|
In past releases, only the <code>Path</code> field was trimmed, and so if the
|
|
request URL contained any escaped characters the URL would be modified to
|
|
have mismatched <code>Path</code> and <code>RawPath</code> fields.
|
|
In Go 1.16, <code>StripPrefix</code> trims both fields.
|
|
If there are escaped characters in the prefix part of the request URL the
|
|
handler serves a 404 instead of its previous behavior of invoking the
|
|
underlying handler with a mismatched <code>Path</code>/<code>RawPath</code> pair.
|
|
</p>
|
|
|
|
<p><!-- CL 252497 -->
|
|
The <a href="/pkg/net/http/"><code>net/http</code></a> package now rejects HTTP range requests
|
|
of the form <code>"Range": "bytes=--N"</code> where <code>"-N"</code> is a negative suffix length, for
|
|
example <code>"Range": "bytes=--2"</code>. It now replies with a <code>416 "Range Not Satisfiable"</code> response.
|
|
</p>
|
|
|
|
<p><!-- CL 256498, golang.org/issue/36990 -->
|
|
Cookies set with <code>SameSiteDefaultMode</code> now behave according to the current
|
|
spec (no attribute is set) instead of generating a SameSite key without a value.
|
|
</p>
|
|
|
|
<p><!-- CL 246338 -->
|
|
The <a href="/pkg/net/http/"><code>net/http</code></a> package now uses the new
|
|
<a href="/pkg/crypto/tls#Conn.HandshakeContext"><code>(*tls.Conn).HandshakeContext</code></a>
|
|
with the <a href="/pkg/net/http/#Request"><code>Request</code></a> context
|
|
when performing TLS handshakes in the client or server.
|
|
</p>
|
|
|
|
<p><!-- CL 250039 -->
|
|
TODO: <a href="https://golang.org/cl/250039">https://golang.org/cl/250039</a>: set Content-Length:0 for empty PATCH requests as with POST, PATCH
|
|
</p>
|
|
|
|
<p><!-- CL 249440 -->
|
|
TODO: <a href="https://golang.org/cl/249440">https://golang.org/cl/249440</a>: match http scheme when selecting http_proxy
|
|
</p>
|
|
</dd>
|
|
</dl><!-- net/http -->
|
|
|
|
<dl id="net/http/httputil"><dt><a href="/pkg/net/http/httputil/">net/http/httputil</a></dt>
|
|
<dd>
|
|
<p><!-- CL 260637 -->
|
|
TODO: <a href="https://golang.org/cl/260637">https://golang.org/cl/260637</a>: flush ReverseProxy immediately if Content-Length is -1
|
|
</p>
|
|
</dd>
|
|
</dl><!-- net/http/httputil -->
|
|
|
|
<dl id="net/smtp"><dt><a href="/pkg/net/smtp/">net/smtp</a></dt>
|
|
<dd>
|
|
<p><!-- CL 247257 -->
|
|
TODO: <a href="https://golang.org/cl/247257">https://golang.org/cl/247257</a>: adds support for the SMTPUTF8 extension
|
|
</p>
|
|
</dd>
|
|
</dl><!-- net/smtp -->
|
|
|
|
<dl id="os"><dt><a href="/pkg/os/">os</a></dt>
|
|
<dd>
|
|
<p><!-- CL 242998 -->
|
|
<a href="/pkg/os/#Process.Signal"><code>Process.Signal</code></a> now
|
|
returns <a href="/pkg/os/#ErrProcessDone"><code>ErrProcessDone</code></a>
|
|
instead of the unexported <code>errFinished</code> when the process has
|
|
already finished.
|
|
</p>
|
|
</dd>
|
|
</dl><!-- os -->
|
|
|
|
<dl id="os/signal"><dt><a href="/pkg/os/signal/">os/signal</a></dt>
|
|
<dd>
|
|
<p><!-- CL 219640 -->
|
|
TODO: <a href="https://golang.org/cl/219640">https://golang.org/cl/219640</a>: add NotifyContext to cancel context using system signals
|
|
</p>
|
|
</dd>
|
|
</dl><!-- os/signal -->
|
|
|
|
<dl id="path"><dt><a href="/pkg/path/">path</a></dt>
|
|
<dd>
|
|
<p><!-- CL 264397 -->
|
|
TODO: <a href="https://golang.org/cl/264397">https://golang.org/cl/264397</a>: validate patterns in Match, Glob
|
|
</p>
|
|
</dd>
|
|
</dl><!-- path -->
|
|
|
|
<dl id="path/filepath"><dt><a href="/pkg/path/filepath/">path/filepath</a></dt>
|
|
<dd>
|
|
<p><!-- CL 264397 -->
|
|
TODO: <a href="https://golang.org/cl/264397">https://golang.org/cl/264397</a>: validate patterns in Match, Glob
|
|
</p>
|
|
</dd>
|
|
</dl><!-- path/filepath -->
|
|
|
|
<dl id="reflect"><dt><a href="/pkg/reflect/">reflect</a></dt>
|
|
<dd>
|
|
<p><!-- CL 248341 -->
|
|
TODO: <a href="https://golang.org/cl/248341">https://golang.org/cl/248341</a>: support multiple keys in struct tags
|
|
</p>
|
|
</dd>
|
|
</dl><!-- reflect -->
|
|
|
|
<dl id="runtime"><dt><a href="/pkg/runtime/">runtime</a></dt>
|
|
<dd>
|
|
<p><!-- CL 37222 -->
|
|
TODO: <a href="https://golang.org/cl/37222">https://golang.org/cl/37222</a>: make stack traces of endless recursion print only top and bottom 50
|
|
</p>
|
|
|
|
<p><!-- CL 242258 -->
|
|
TODO: <a href="https://golang.org/cl/242258">https://golang.org/cl/242258</a>: add 24 byte allocation size class
|
|
</p>
|
|
|
|
<p><!-- CL 254659 -->
|
|
TODO: <a href="https://golang.org/cl/254659">https://golang.org/cl/254659</a>: implement GODEBUG=inittrace=1 support
|
|
</p>
|
|
</dd>
|
|
</dl><!-- runtime -->
|
|
|
|
<dl id="runtime/debug"><dt><a href="/pkg/runtime/debug/">runtime/debug</a></dt>
|
|
<dd>
|
|
<p><!-- CL 249677 -->
|
|
The <a href="/pkg/runtime#Error"><code>runtime.Error</code> values
|
|
used when <code>SetPanicOnFault</code> is enabled may now have an
|
|
<code>Addr</code> method. If that method exists, it returns the memory
|
|
address that triggered the fault.
|
|
</p>
|
|
</dd>
|
|
</dl><!-- runtime/debug -->
|
|
|
|
<dl id="strconv"><dt><a href="/pkg/strconv/">strconv</a></dt>
|
|
<dd>
|
|
<p><!-- CL 260858 -->
|
|
<a href="/pkg/strconv/#ParseFloat"><code>ParseFloat</code></a> now uses
|
|
the <a
|
|
href="https://nigeltao.github.io/blog/2020/eisel-lemire.html">Eisel-Lemire
|
|
algorithm</a>, improving performance by up to a factor of 2. This can
|
|
also speed up decoding textual formats like <a
|
|
href="/pkg/encoding/json/"><code>encoding/json</code></a>.
|
|
</p>
|
|
</dd>
|
|
</dl><!-- strconv -->
|
|
|
|
<dl id="syscall"><dt><a href="/pkg/syscall/">syscall</a></dt>
|
|
<dd>
|
|
<p><!-- CL 261917 -->
|
|
<a href="/pkg/syscall/#SysProcAttr"><code>SysProcAttr</code></a> on Windows has a new NoInheritHandles field that disables inheriting handles when creating a new process.
|
|
</p>
|
|
|
|
<p><!-- CL 269761, golang.org/issue/42584 -->
|
|
<a href="/pkg/syscall/#DLLError"><code>DLLError</code></a> on Windows now has an Unwrap function for unwrapping its underlying error.
|
|
</p>
|
|
|
|
<p><!-- CL 210639 -->
|
|
TODO: <a href="https://golang.org/cl/210639">https://golang.org/cl/210639</a>: support POSIX semantics for Linux syscalls
|
|
</p>
|
|
</dd>
|
|
</dl><!-- syscall -->
|
|
|
|
<dl id="text/template"><dt><a href="/pkg/text/template/">text/template</a></dt>
|
|
<dd>
|
|
<p><!-- CL 254257, golang.org/issue/29770 -->
|
|
Newlines characters are now allowed inside action delimiters,
|
|
permitting actions to span multiple lines.
|
|
</p>
|
|
</dd>
|
|
</dl><!-- text/template -->
|
|
|
|
<dl id="text/template/parse"><dt><a href="/pkg/text/template/parse/">text/template/parse</a></dt>
|
|
<dd>
|
|
<p><!-- CL 229398, golang.org/issue/34652 -->
|
|
A new <a href="/pkg/text/template/parse/#CommentNode"><code>CommentNode</code></a>
|
|
was added to the parse tree. The <a href="/pkg/text/template/parse/#Mode"><code>Mode</code></a>
|
|
field in the <code>parse.Tree</code> enables access to it.
|
|
</p>
|
|
</dd>
|
|
</dl><!-- text/template/parse -->
|
|
|
|
<dl id="time/tzdata"><dt><a href="/pkg/time/tzdata/">time/tzdata</a></dt>
|
|
<dd>
|
|
<p><!-- CL 261877 -->
|
|
The slim timezone data format is now used for the timezone database in
|
|
<code>$GOROOT/lib/time/zoneinfo.zip</code> and the embedded copy in this
|
|
package. This reduces the size of the timezone database by about 350 KB.
|
|
</p>
|
|
</dd>
|
|
</dl><!-- time/tzdata -->
|
|
|
|
<dl id="unicode"><dt><a href="/pkg/unicode/">unicode</a></dt>
|
|
<dd>
|
|
<p><!-- CL 248765 -->
|
|
The <a href="/pkg/unicode/"><code>unicode</code></a> package and associated
|
|
support throughout the system has been upgraded from Unicode 12.0.0 to
|
|
<a href="https://www.unicode.org/versions/Unicode13.0.0/">Unicode 13.0.0</a>,
|
|
which adds 5,930 new characters, including four new scripts, and 55 new emoji.
|
|
Unicode 13.0.0 also designates plane 3 (U+30000-U+3FFFF) as the tertiary
|
|
ideographic plane.
|
|
</p>
|
|
</dd>
|
|
</dl><!-- unicode -->
|