diff --git a/utils/io2/range.go b/utils/io2/range.go
index a4a0b35..46b4add 100644
--- a/utils/io2/range.go
+++ b/utils/io2/range.go
@@ -37,16 +37,22 @@ func (r *rng) Read(p []byte) (n int, err error) {
 
 	need := math2.Min(*r.length, int64(len(p)))
 	rd, err := r.inner.Read(p[:need])
-	if err != nil {
-		r.err = err
-		return rd, io.EOF
-	}
 
 	*r.length -= int64(rd)
 	if *r.length == 0 {
 		r.err = io.EOF
 	}
 
+	if err == nil {
+		return rd, nil
+	}
+
+	if err != io.EOF {
+		r.err = err
+		return rd, err
+	}
+
+	r.err = io.EOF
 	return rd, nil
 }