Fixed integer overflow in `lshift`.

5900b29f · Yukihiro "Matz" Matsumoto · 7dae0ec7 · 5900b29f
Commit 5900b29f authored Jul 30, 2019 by Yukihiro "Matz" Matsumoto
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src/numeric.c src/numeric.c +1 -1

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--- a/src/numeric.c
+++ b/src/numeric.c
@@ -1119,7 +1119,7 @@ lshift(mrb_state *mrb, mrb_int val, mrb_int width)
  }
  else {
    if ((width > NUMERIC_SHIFT_WIDTH_MAX) ||
-        (val   < (MRB_INT_MIN >> width))) {
+        (val   <= (MRB_INT_MIN >> width))) {
 #ifdef MRB_WITHOUT_FLOAT
      return mrb_fixnum_value(0);
 #else