lib/combine_pdf/parser.rb in combine_pdf-1.0.23 vs lib/combine_pdf/parser.rb in combine_pdf-1.0.24

@@ -321,11 +321,11 @@
                 str << 8
               when 102 # f, form-feed
                 str << 12
               when 48..57 # octal notation for byte?
                 rep -= 48
-                rep = (rep << 3) + (str_bytes.shift-48) if str_bytes[0].between?(48, 57)
-                rep = (rep << 3) + (str_bytes.shift-48) if str_bytes[0].between?(48, 57) && (((rep << 3) + (str_bytes[0] - 48)) <= 255)
+                rep = (rep << 3) + (str_bytes.shift-48) if str_bytes[0]&.between?(48, 57)
+                rep = (rep << 3) + (str_bytes.shift-48) if str_bytes[0]&.between?(48, 57) && (((rep << 3) + (str_bytes[0] - 48)) <= 255)
                 str << rep
               when 10 # new line, ignore
                 str_bytes.shift if str_bytes[0] == 13
                 true
               when 13 # new line (or double notation for new line), ignore