Terminate float right shift if shift value is too big.

752edf41 · Yukihiro "Matz" Matsumoto · 6af0effd · 752edf41
Commit 752edf41 authored May 16, 2019 by Yukihiro "Matz" Matsumoto
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src/numeric.c src/numeric.c +4 -0

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--- 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);