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context: handle nil values for valueCtx.String()

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Fixes #68356

Change-Id: I57dc089a99f545e29a6759a8db5e28fabb6d1a61
Reviewed-on: https://go-review.googlesource.com/c/go/+/597415
Commit-Queue: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Sean Liao 2024-07-09 20:24:34 +01:00 committed by Gopher Robot
parent 183a40db6d
commit 70e453b436
2 changed files with 6 additions and 0 deletions
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2
src/context/context.go
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@ -739,6 +739,8 @@ func stringify(v any) string {
return s.String()
case string:
return s
case nil:
return "<nil>"
}
return reflectlite.TypeOf(v).String()
}

4
src/context/x_test.go
View File

@ -243,6 +243,10 @@ func TestValues(t *testing.T) {
c4 := WithValue(c3, k1, nil)
check(c4, "c4", "", "c2k2", "c3k3")
if got, want := fmt.Sprint(c4), `context.Background.WithValue(context_test.key1, c1k1).WithValue(context_test.key2(1), c2k2).WithValue(context_test.key2(3), c3k3).WithValue(context_test.key1, <nil>)`; got != want {
t.Errorf("c.String() = %q want %q", got, want)
}
o0 := otherContext{Background()}
check(o0, "o0", "", "", "")