prevent crash on empty line

1 files changed, 1 insertions, 1 deletions

diff --git a/cache/cache.go b/cache/cache.go
index f06716f..8514e58 100644
--- a/cache/cache.go
+++ b/cache/cache.go
@@ -73,7 +73,7 @@ func Unmarshal(r io.Reader) (Cache, error) {
 	scanner := bufio.NewScanner(r)
 	for scanner.Scan() {
 		line := strings.TrimSpace(scanner.Text())
-		if line == "" || line[0] == '#' || line[0:2] == "//" {
+		if line == "" || strings.HasPrefix(line, "#") || strings.HasPrefix(line, "//") {
 			continue
 		}