From 752edf413f09fb3e78d79ca7d752ae5dc2e25c02 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 16 May 2019 09:51:27 +0900
Subject: Terminate float right shift if shift value is too big.

---
 src/numeric.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/numeric.c')

diff --git a/src/numeric.c b/src/numeric.c
index 101b338de..5dbf9df22 100644
--- a/src/numeric.c
+++ b/src/numeric.c
@@ -484,6 +484,10 @@ flo_shift(mrb_state *mrb, mrb_value x, mrb_int width)
   if (width < 0) {
     while (width++) {
       val /= 2;
+      if (val < 1.0) {
+        val = 0;
+        break;
+      }
     }
 #if defined(_ISOC99_SOURCE)
     val = trunc(val);
-- 
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