I tried to map int to String/AtomicString, however found the following test will crash HashMap.

TEST(HashMapTest, IntToStringMapTest) {
  using IntToStringMap = HashMap<int, String>;
  IntToStringMap map;
  map.add(0, "abc");
  auto iter = map.find(0);
  ASSERT_TRUE(iter != map.end());
  EXPECT_EQ("abc", iter->value);
}

It happens for the key is integer 0 and the value is a String/AtomicString.

It reaches an assertion failure at HashTable.h(1243):
ASSERTION FAILED: !isEmptyOrDeletedBucket(*entry)