assertFalse(UniAddress.isDotQuadIP(input));
        }

        @Test
        void shouldReturnTrueForInvalidOctetValues() {
            // isDotQuadIP does not validate octet values, only checks format
            assertTrue(UniAddress.isDotQuadIP("192.168.1.256"));
            assertTrue(UniAddress.isDotQuadIP("999.999.999.999"));
        }

        @Test

	print(b)
	print(a)
}

func main() {
	go f()
	g()
}
</pre>

<p>
it can happen that <code>g</code> prints <code>2</code> and then <code>0</code>.
</p>

<p>
This fact invalidates a few common idioms.
</p>

<p>
Double-checked locking is an attempt to avoid the overhead of synchronization.
For example, the <code>twoprint</code> program might be
incorrectly written as:
</p>

@Immutable
@GwtCompatible
public final class HostAndPort implements Serializable {
  /** Magic value indicating the absence of a port number. */
  private static final int NO_PORT = -1;

  /** Hostname, IPv4/IPv6 literal, or unvalidated nonsense. */
  private final String host;

  /** Validated port number in the range [0..65535], or NO_PORT */
  private final int port;

  /** True if the parsed host has colons, but no surrounding brackets. */

 * stale).
 */
class CacheStrategy internal constructor(
  /** The request to send on the network, or null if this call doesn't use the network. */
  val networkRequest: Request?,
  /** The cached response to return or validate; or null if this call doesn't use a cache. */
  val cacheResponse: Response?,
) {
  class Factory(
    private val nowMillis: Long,
    internal val request: Request,
    private val cacheResponse: Response?,
  ) {

  validation:
    name: "Validation"
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
      - uses: gradle/actions/wrapper-validation@v5
      - name: Validate Renovate
        uses: rinchsan/renovate-config-validator@v0.2.0
        with:
          pattern: '.github/renovate.json'

  checks:
    permissions:
      checks: write # for mikepenz/action-junit-report

        int read = resp.decode(packet, 0, false);
        assertTrue(read >= SMB2_HEADER_LENGTH + body.length, "Should decode at least header+body");

        // Validate simple getters
        assertEquals((byte) 0x7, resp.getOplockLevel());
        assertEquals((byte) 0x2, resp.getOpenFlags());
        assertEquals(0x11223344, resp.getCreateAction());

	} else {
		v, ok = r.Header[xhttp.AmzContentSha256]
	}

	// Skip if no header was set.
	if !ok {
		return true
	}

	// If x-amz-content-sha256 is set and the value is not
	// 'UNSIGNED-PAYLOAD' we should validate the content sha256.
	switch v[0] {
	case unsignedPayload, unsignedPayloadTrailer:
		return true
	case emptySHA256:
		// some broken clients set empty-sha256
		// with > 0 content-length in the body,

        if (sessionId != null) {
            final ChatSession session = findSession(sessionId);
            if (session != null) {
                final String sessionUserId = session.getUserId();
                // Validate userId matches - prevent cross-user session access
                if (userId != null && !userId.equals(sessionUserId)) {
                    logger.warn("Session userId mismatch. sessionId={}, requestUserId={}", sessionId, userId);

    }

    @Test
    public void testInvalidUncPath() throws Exception {
        // Due to normalization removing duplicate backslashes, true UNC validation doesn't work
        // These tests validate current behavior where problematic paths are caught by other checks

        // Test invalid server name with dots - caught by directory traversal check
        assertThrows(SmbException.class, () -> {

        }
    }
    
    public void validateNotification(WitnessNotification notification) throws SecurityException {
        // Validate notification authenticity
        if (!isValidNotificationSource(notification)) {
            throw new SecurityException("Invalid witness notification source");
        }
    }