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array.c: check for negative shift size.

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Yukihiro "Matz" Matsumoto
2021-05-27 08:13:49 +09:00
parent c019d8d34d
commit 9a72869043
1 changed files with 1 additions and 0 deletions
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src/array.c
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@@ -591,6 +591,7 @@ mrb_ary_shift_m(mrb_state *mrb, mrb_value self)
};
ary_modify_check(mrb, a);
if (len == 0 || n == 0) return mrb_ary_new(mrb);
if (n < 0) mrb_raise(mrb, E_ARGUMENT_ERROR, "negative array shift");
if (n > len) n = len;
val = mrb_ary_new_from_values(mrb, n, ARY_PTR(a));
if (ARY_SHARED_P(a)) {