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flag: Check for Set error
Check for Set error when a boolean flag isn't explicitly given a value. Fixes #9345 Change-Id: I97a1289f8cf27567d1a726ebe5ef167c800f357c Reviewed-on: https://go-review.googlesource.com/1897 Reviewed-by: Andrew Gerrand <adg@golang.org> Reviewed-by: Rob Pike <r@golang.org>
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@ -767,7 +767,9 @@ func (f *FlagSet) parseOne() (bool, error) {
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return false, f.failf("invalid boolean value %q for -%s: %v", value, name, err)
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}
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} else {
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fv.Set("true")
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if err := fv.Set("true"); err != nil {
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return false, f.failf("invalid boolean flag %s: %v", name, err)
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}
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}
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} else {
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// It must have a value, which might be the next argument.
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