n.Kind = "not-type"
		}
		needType = append(needType, n)
	}
	if nerrors > 0 {
		// Check if compiling the preamble by itself causes any errors,
		// because the messages we've printed out so far aren't helpful
		// to users debugging preamble mistakes. See issue 8442.
		preambleErrors := p.gccErrors([]byte(builtinProlog + f.Preamble))
		if len(preambleErrors) > 0 {