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doc: describe vet -lostcancel in go1.7 release notes 

Change-Id: Ie1c95fd0869307551bfcf76bf45c13372723fbba
Reviewed-on: https://go-review.googlesource.com/24288
Reviewed-by: Rob Pike <r@golang.org>
This commit is contained in:
Alan Donovan 2016-06-21 11:11:50 -04:00
parent b65cb7f198
commit eaf4ad6f74
1 changed files with 12 additions and 0 deletions
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@ -288,6 +288,18 @@ To avoid confusion with the new <code>-tests</code> check, the old, unadvertised
<code>-test</code> option has been removed; it was equivalent to <code>-all</code> <code>-shadow</code>.
</p>
<p id="vet_lostcancel">
The <code>vet</code> command also has a new check,
<code>-lostcancel</code>, which detects failure to call the
cancellation function returned by the <code>WithCancel</code>,
<code>WithTimeout</code>, and <code>WithDeadline</code> functions in
Go 1.7's new <code>context</code> package (see <a
href='#context'>below</a>).
Failure to call the function prevents the new <code>Context</code>
from being reclaimed until its parent is cancelled.
(The background context is never cancelled.)
</p>
<h3 id="cmd_dist">Go tool dist</h3>
<p>