Fixed issue hyperjumptech#373 (hyperjumptech#402)

Co-authored-by: Ferdinand Neman <ferdinand@hyperjump.tech>

Author: newm4n

ast/Serializer.go

@@ -1535,11 +1535,15 @@ func (meta *ConstantMeta) ReadMetaFrom(reader io.Reader) error {
 		return err
 	}
 	byteArr := make([]byte, length)
-	_, err = reader.Read(byteArr)
+	readCount, err := reader.Read(byteArr)
 	if err != nil {
 
 		return err
 	}
+	if uint64(readCount) != length {
+
+		return io.ErrShortBuffer
+	}
 	meta.ValueBytes = byteArr
 
 	b, err := ReadBoolFromReader(reader)