From 9bf1c0e1dc09d9aa577554d58d91f3889a77b918 Mon Sep 17 00:00:00 2001
From: Bouke van der Bijl <boukevanderbijl@gmail.com>
Date: Wed, 23 Nov 2016 15:18:52 -0500
Subject: Fix segfault when Fixnum#chr doesn't return a string

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

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

diff --git a/mrbgems/mruby-sprintf/src/sprintf.c b/mrbgems/mruby-sprintf/src/sprintf.c
index 8d14b0fc5..ccee23bd2 100644
--- a/mrbgems/mruby-sprintf/src/sprintf.c
+++ b/mrbgems/mruby-sprintf/src/sprintf.c
@@ -675,6 +675,7 @@ retry:
         else {
           mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid character");
         }
+        mrb_check_type(mrb, tmp, MRB_TT_STRING);
         c = RSTRING_PTR(tmp);
         n = RSTRING_LEN(tmp);
         if (!(flags & FWIDTH)) {
-- 
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