improve error messages

1 files changed, 2 insertions, 2 deletions

diff --git a/util.go b/util.go
index 544818e..d041168 100644
--- a/util.go
+++ b/util.go
@@ -35,12 +35,12 @@ func trimLinePrefix(line string, prefix string) string {
 func parse_data(line string) (data string, err error) {
 	nl := strings.IndexByte(line, '\n')
 	if nl < 0 {
-		return "", errors.Errorf("data: expected newline: %q", data)
+		return "", errors.Errorf("data: expected newline: %q", line)
 	}
 	head := line[:nl+1]
 	rest := line[nl+1:]
 	if !strings.HasPrefix(head, "data ") {
-		return "", errors.Errorf("data: could not parse: %q", data)
+		return "", errors.Errorf("data: could not parse: %q", line)
 	}
 	if strings.HasPrefix(head, "data <<") {
 		// Delimited format