From 3c5baac5c5159b11a60bc8b5e6eac6fbd78e241f Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 30 Jul 2024 11:33:18 +0900
Subject: [PATCH] mruby-sprintf: fix a bug with negative octals

Leading octal digit may be 1, 3, 7 unlike binary or hexadecimal.
---
 mrbgems/mruby-sprintf/src/sprintf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mrbgems/mruby-sprintf/src/sprintf.c b/mrbgems/mruby-sprintf/src/sprintf.c
index 6ebe8fab9..16943bec1 100644
--- a/mrbgems/mruby-sprintf/src/sprintf.c
+++ b/mrbgems/mruby-sprintf/src/sprintf.c
@@ -666,6 +666,9 @@ retry:
         }
 
         if (dots) {
+          if (base == 8 && (*s == '1' || *s == '3')) {
+            s++; len--;
+          }
           while (*s == fc) {
             s++; len--;
           }