From c5b21c3f4c17b0649155035d2f9aa97b2da8a813 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Fri, 30 Jul 2021 14:28:58 -0700 Subject: libgo: update to Go1.17rc2 Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/341629 --- libgo/go/strings/builder.go | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'libgo/go/strings/builder.go') diff --git a/libgo/go/strings/builder.go b/libgo/go/strings/builder.go index 6ff151d..547e52e84 100644 --- a/libgo/go/strings/builder.go +++ b/libgo/go/strings/builder.go @@ -103,7 +103,8 @@ func (b *Builder) WriteByte(c byte) error { // It returns the length of r and a nil error. func (b *Builder) WriteRune(r rune) (int, error) { b.copyCheck() - if r < utf8.RuneSelf { + // Compare as uint32 to correctly handle negative runes. + if uint32(r) < utf8.RuneSelf { b.buf = append(b.buf, byte(r)) return 1, nil } -- cgit v1.1