wmap_cmp will always return true for dead entries since dead entries have
a Qundef value. When the keys have a hash collision, this may cause the
wrong entry to be returned.
This commit changes wmap_cmp to compare by weakmap_entry pointers when
the entry is dead.
@@ -221,7 +221,15 @@ static const rb_data_type_t weakmap_type = {
static int
wmap_cmp(st_data_t x, st_data_t y)
{
- return *(VALUE *)x != *(VALUE *)y;
+ VALUE x_obj = *(VALUE *)x;
+ VALUE y_obj = *(VALUE *)y;
+
+ if (!wmap_live_p(x_obj) && !wmap_live_p(y_obj)) {
+ return x != y;
+ }
+ else {
+ return x_obj != y_obj;
+ }
}
static st_index_t