From e3922318bd2679de7930ba7c520d58961340e006 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Sat, 11 Mar 2017 15:18:41 +0900
Subject: Check return value from snprintf(); ref #3498

---
 mrbgems/mruby-sprintf/src/sprintf.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'mrbgems/mruby-sprintf')

diff --git a/mrbgems/mruby-sprintf/src/sprintf.c b/mrbgems/mruby-sprintf/src/sprintf.c
index d02a2aa4d..a3e20d83a 100644
--- a/mrbgems/mruby-sprintf/src/sprintf.c
+++ b/mrbgems/mruby-sprintf/src/sprintf.c
@@ -1087,6 +1087,9 @@ retry:
 
         CHECK(need);
         n = snprintf(&buf[blen], need, fbuf, fval);
+        if (n < 0) {
+          mrb_raise(mrb, E_RUNTIME_ERROR, "formatting error");
+        }
         blen += n;
       }
       break;
-- 
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