if (arg == null) {
      throw new ParameterNotInstantiableException(param);
    }
    return arg;
  }

  private static <X extends Throwable> void throwFirst(List<X> exceptions) throws X {
    if (!exceptions.isEmpty()) {
      throw exceptions.get(0);
    }
  }

  /** Factories with the least number of parameters are listed first. */

Y en muchos casos leerlos sería una operación bloqueante (que podría bloquear el event loop), porque se leen desde disco o desde la red.

/// info | Información

El ejemplo anterior es en realidad una excepción, porque el objeto `io.BytesIO` ya está en memoria, así que leerlo no bloqueará nada.

Pero en muchos casos leer un archivo u objeto tipo archivo sí bloquearía.

///

participant client as Client
participant handler as Exception handler
participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,operation: Can raise exceptions, including HTTPException
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise Exception
        dep -->> handler: Raise Exception
        handler -->> client: HTTP error response

        assertTrue(exception.getStackTrace().length > 0);
    }

    @Test
    public void test_multipleNestedExceptions() {
        // Test with multiple nested exceptions
        Exception innerCause = new IllegalArgumentException("Invalid image format");
        Exception middleCause = new RuntimeException("Processing failed", innerCause);

    private final RuntimeException ex;

    private ThrowingIterator(RuntimeException ex) {
      this.ex = ex;
    }

    @Override
    public boolean hasNext() {
      // IteratorTester doesn't expect exceptions for hasNext().
      return true;
    }

    @Override
    public E next() {
      ex.fillInStackTrace();
      throw ex;
    }

    @Override
    public void remove() {

            });

            thread1.start();
            thread2.start();
            thread1.join();
            thread2.join();

            // Then - no exceptions should occur
            assertTrue(true);
        }
    }

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.ArtifactRepositoryPolicy;

/**
 * Base class for artifact resolution exceptions.
 *
 */
public class AbstractArtifactResolutionException extends Exception {
    private String groupId;

    private String artifactId;

    private String version;

    private String type;

      // .get() and therefore this is equivalent to calling .get() and unpacking the exceptions like
      // we do below (just much faster because it is a single field read instead of a read, several
      // branches and possibly creating exceptions).
      Object v = ((AbstractFuture<?>) future).value();
      if (v instanceof Cancellation) {

        assertEquals(complexMessageCode, exception.getMessageCode());
    }

    @Test
    public void test_causeChainPropagation() {
        // Setup - create a chain of exceptions
        final Exception rootCause = new IllegalArgumentException("Root cause");
        final Exception middleCause = new IllegalStateException("Middle cause", rootCause);
        final String message = "Top level SSO error";

class WebSocketWriterTest {
  private val data = Buffer()
  private val random = Random(0)

  /**
   * Check all data as verified inside of the test. We do this in an AfterEachCallback so that
   * exceptions thrown from the test do not cause this check to fail.
   */
  @RegisterExtension
  val noDataLeftBehind =
    AfterEachCallback { context: ExtensionContext ->