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Fix memory corruption in Enumerable#reverse_each [ruby-dev:50867] [Bug #16354]

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Kazuki Tsujimoto 2019-11-19 09:35:47 -06:00
parent 61131edba7
commit ff41663403
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2 changed files with 22 additions and 3 deletions
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12
enum.c
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@ -2419,14 +2419,20 @@ static VALUE
enum_reverse_each(int argc, VALUE *argv, VALUE obj)
{
VALUE ary;
long i;
long len;
RETURN_SIZED_ENUMERATOR(obj, argc, argv, enum_size);
ary = enum_to_a(argc, argv, obj);
for (i = RARRAY_LEN(ary); --i >= 0; ) {
rb_yield(RARRAY_AREF(ary, i));
len = RARRAY_LEN(ary);
while (len--) {
long nlen;
rb_yield(RARRAY_AREF(ary, len));
nlen = RARRAY_LEN(ary);
if (nlen < len) {
len = nlen;
}
}
return obj;