From f30ec2dfb0217fd1426dbdfa1db22da51bbe73b5 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Sat, 11 Mar 2017 15:22:42 +0900
Subject: fixup! Check return value from snprintf(); ref #3498

---
 mrbgems/mruby-sprintf/src/sprintf.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'mrbgems/mruby-sprintf/src')

diff --git a/mrbgems/mruby-sprintf/src/sprintf.c b/mrbgems/mruby-sprintf/src/sprintf.c
index a3e20d83a..fcda7733d 100644
--- a/mrbgems/mruby-sprintf/src/sprintf.c
+++ b/mrbgems/mruby-sprintf/src/sprintf.c
@@ -1049,7 +1049,10 @@ retry:
             need = width;
 
           CHECK(need + 1);
-          snprintf(&buf[blen], need + 1, "%*s", need, "");
+          n = snprintf(&buf[blen], need + 1, "%*s", need, "");
+          if (n < 0) {
+            mrb_raise(mrb, E_RUNTIME_ERROR, "formatting error");
+          }
           if (flags & FMINUS) {
             if (!isnan(fval) && fval < 0.0)
               buf[blen++] = '-';
-- 
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