assertEquals("Counts not as expected", Ints.asList(deltas), actualCounts);
    } finally {
      pool.shutdownNow();
    }

    // Since we have access to the backing map, verify that there are no zeroes in the map
    for (AtomicInteger value : map.values()) {
      assertTrue("map should not contain a zero", value.get() != 0);
    }
  }

  private static class MutateTask implements Callable<int[]> {

        checkVersionsOrder(c, d);
        checkVersionsOrder(b, d);
        checkVersionsOrder(a, d);
    }

    /**
     * Test all versions are equal when starting with many leading zeroes regardless of string length
     * (related to MNG-6572 optimization)
     */
    @Test
    void testVersionEqualWithLeadingZeroes() {
        // versions with string lengths from 1 to 19

        int end = ipString.indexOf(IPV6_DELIMITER, start);
        if (end == -1) {
          end = ipString.length();
        }
        if (ipString.charAt(start) == IPV6_DELIMITER) {
          // expand zeroes
          for (int i = 0; i < partsSkipped; i++) {
            rawBytes.putShort((short) 0);
          }

        } else {
          rawBytes.putShort(parseHextet(ipString, start, end));
        }

        int end = ipString.indexOf(IPV6_DELIMITER, start);
        if (end == -1) {
          end = ipString.length();
        }
        if (ipString.charAt(start) == IPV6_DELIMITER) {
          // expand zeroes
          for (int i = 0; i < partsSkipped; i++) {
            rawBytes.putShort((short) 0);
          }

        } else {
          rawBytes.putShort(parseHextet(ipString, start, end));
        }

        longestRunOffset = currentRunOffset
        longestRunLength = currentRunLength
      }
      i += 2
    }
  }

  // Emit each 2-byte group in hex, separated by ':'. The longest run of zeroes is "::".
  val result = Buffer()
  var i = 0
  while (i < address.size) {
    if (i == longestRunOffset) {
      result.writeByte(':'.code)
      i += longestRunLength

   * AtomicInteger's atomic operations, with some help from ConcurrentMap's atomic operations on
   * creation and removal (including automatic removal of zeroes). If the modification of an
   * AtomicInteger results in zero, we compareAndSet the value to zero; if that succeeds, we remove
   * the entry from the Map. If another operation sees a zero in the map, it knows that the entry is

   * it is returned directly. Otherwise, a new array of size {@code minLength + padding} is
   * returned, containing the values of {@code array}, and zeroes in the remaining places.
   *
   * @param array the source array
   * @param minLength the minimum length the returned array must guarantee
   * @param padding an extra amount to "grow" the array by if growth is necessary

   * it is returned directly. Otherwise, a new array of size {@code minLength + padding} is
   * returned, containing the values of {@code array}, and zeroes in the remaining places.
   *
   * @param array the source array
   * @param minLength the minimum length the returned array must guarantee
   * @param padding an extra amount to "grow" the array by if growth is necessary

<code>DATA</code> directives followed by a <code>GLOBL</code> directive.
Each <code>DATA</code> directive initializes a section of the
corresponding memory.
The memory not explicitly initialized is zeroed.
The general form of the <code>DATA</code> directive is

<pre>
DATA	symbol+offset(SB)/width, value
</pre>

<p>
which initializes the symbol memory at the given offset and width with the given value.

   * it is returned directly. Otherwise, a new array of size {@code minLength + padding} is
   * returned, containing the values of {@code array}, and zeroes in the remaining places.
   *
   * @param array the source array
   * @param minLength the minimum length the returned array must guarantee
   * @param padding an extra amount to "grow" the array by if growth is necessary