var golang.org/x/text/internal/language.ErrDuplicateKey

2 uses

	golang.org/x/text/internal/language (current package)
		parse.go#L39: var ErrDuplicateKey = errors.New("language: different values for same key in -u extension")
		parse.go#L535: 							scan.setError(ErrDuplicateKey)

The pages are generated with Golds v0.3.2-preview. (GOOS=darwin GOARCH=amd64)
Golds is a Go 101 project developed by Tapir Liu.
PR and bug reports are welcome and can be submitted to the issue list.
Please follow @Go100and1 (reachable from the left QR code) to get the latest news of Golds.