From db296e95939ed856abb564135d2e6f586cf1888e Mon Sep 17 00:00:00 2001
From: Rory OConnell <19547+RoryO@users.noreply.github.com>
Date: Fri, 26 Jun 2020 15:13:04 -0700
Subject: work around MSC optimization generating non functional code

---
 mrbgems/mruby-random/src/random.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/mrbgems/mruby-random/src/random.c b/mrbgems/mruby-random/src/random.c
index 515c0707a..6f31b15a6 100644
--- a/mrbgems/mruby-random/src/random.c
+++ b/mrbgems/mruby-random/src/random.c
@@ -210,9 +210,16 @@ random_m_srand(mrb_state *mrb, mrb_value self)
  *  Shuffles elements in self in place.
  */
 
+#if defined _MSC_VER && _MSC_VER >= 1900
+#pragma optimize( "", off )
+#endif
 static mrb_value
 mrb_ary_shuffle_bang(mrb_state *mrb, mrb_value ary)
 {
+ /*
+ * MSC compiler generating invalid instructions with optimization
+ * enabled
+ */
   mrb_int i;
   mrb_value max;
   mrb_value r = mrb_nil_value();
-- 
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