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<!--{
"Title": "Go 1.21 Release Notes",
"Path": "/doc/go1.21"
}-->
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NOTE: In this document and others in this directory, the convention is to
set fixed-width phrases with non-fixed-width spaces, as in
<code>hello</code> <code>world</code>.
Do not send CLs removing the interior tags from such phrases.
-->
<style>
main ul li { margin: 0.5em 0; }
</style>
<h2 id="introduction">DRAFT RELEASE NOTES — Introduction to Go 1.21</h2>
<p>
<strong>
Go 1.21 is not yet released. These are work-in-progress
release notes. Go 1.21 is expected to be released in August 2023.
</strong>
</p>
<h2 id="language">Changes to the language</h2>
<p>
TODO: complete this section
</p>
<h2 id="ports">Ports</h2>
<p>
TODO: complete this section, or delete if not needed
</p>
<h2 id="tools">Tools</h2>
<h3 id="go-command">Go command</h3>
<p>
TODO: complete this section, or delete if not needed
</p>
<h2 id="runtime">Runtime</h2>
<p>
TODO: complete this section, or delete if not needed
</p>
<p><!-- https://go.dev/issue/7181 -->
When printing very deep stacks, the runtime now prints the first 50
(innermost) frames followed by the bottom 50 (outermost) frames,
rather than just printing the first 100 frames. This makes it easier
to see how deeply recursive stacks started, and is especially
valuable for debugging stack overflows.
</p>
<h2 id="compiler">Compiler</h2>
<p>
TODO: complete this section, or delete if not needed
</p>
<h2 id="linker">Linker</h2>
<p>
TODO: complete this section, or delete if not needed
</p>
<h2 id="library">Core library</h2>
<h3 id="minor_library_changes">Minor changes to the library</h3>
<p>
As always, there are various minor changes and updates to the library,
made with the Go 1 <a href="/doc/go1compat">promise of compatibility</a>
in mind.
There are also various performance improvements, not enumerated here.
</p>
<p>
TODO: complete this section
</p>