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doc: document cmd/vet changes for 1.18 release
cmd/vet has several precision improvements for the checkers copylock, printf, sortslice, testinggoroutine, and tests. Adds a high level mention in the release notes and an example of string constant concatenation. Updates #47694 Change-Id: I7a342a57ca3fd9e2f3e8ec99f7b647269798317f Reviewed-on: https://go-review.googlesource.com/c/go/+/370734 Reviewed-by: Russ Cox <rsc@golang.org> Reviewed-by: Robert Findley <rfindley@google.com> Trust: Tim King <taking@google.com> Run-TryBot: Tim King <taking@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
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@ -288,6 +288,21 @@ Do not send CLs removing the interior tags from such phrases.
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}</pre>
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}</pre>
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<h4 id="vet-precision">Precision improvements for existing checkers</h4>
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<p><!-- CL 323589 356830 319689 355730 351553 338529 -->
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The <code>cmd/vet</code> checkers <code>copylock</code>, <code>printf</code>,
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<code>sortslice</code>, <code>testinggoroutine</code>, and <code>tests</code>
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have all had moderate precision improvements to handle additional code patterns.
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This may lead to newly reported errors in existing packages. For example, the
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<code>printf</code> checker now tracks formatting strings created by
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concatenating string constants. So <code>vet</code> will report an error in:
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<pre>
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// fmt.Printf formatting directive %d is being passed to Println.
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fmt.Println("%d"+` ≡ x (mod 2)`+"\n", x%2)
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</pre>
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</p>
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<h2 id="runtime">Runtime</h2>
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<h2 id="runtime">Runtime</h2>
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<p><!-- https://golang.org/issue/44167 -->
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<p><!-- https://golang.org/issue/44167 -->
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