if (status != null) {
            halted = status.isHalted();
        } else {
            // assume sensible default
            Throwable t = projectExecutionEvent.getCause();
            halted = (t instanceof RuntimeException || !(t instanceof Exception))
                    || !MavenExecutionRequest.REACTOR_FAIL_NEVER.equals(session.getReactorFailureBehavior())

import org.jspecify.annotations.Nullable;

/**
 * {@link Error} variant of {@link java.util.concurrent.ExecutionException}. As with {@code
 * ExecutionException}, the error's {@linkplain #getCause() cause} comes from a failed task,
 * possibly run in another thread. That cause should itself be an {@code Error}; if not, use {@code
 * ExecutionException} or {@link UncheckedExecutionException}. This allows the client code to

    try {
      method.invoke(wrapper, getParameterValues(method));
      fail(method + " failed to throw exception as is.");
    } catch (InvocationTargetException e) {
      if (exception != e.getCause()) {
        throw new RuntimeException(e);
      }
    } catch (IllegalAccessException e) {
      throw new AssertionError(e);
    }
  }

  private static <T> void testEquals(

            try {
              String result = Uninterruptibles.getUninterruptibly(currentFuture.get());
              finalResults.add(result);
            } catch (ExecutionException e) {
              finalResults.add(e.getCause());
            } catch (CancellationException e) {
              finalResults.add(CancellationException.class);
            } finally {
              awaitUnchecked(barrier);
            }
          }

        Exception e = assertThrows(Exception.class, () -> ee.evaluate("${session.rootDirectory}"));
        e = assertInstanceOf(IntrospectionException.class, e.getCause());
        e = assertInstanceOf(IllegalStateException.class, e.getCause());
        assertEquals(RootLocator.UNABLE_TO_FIND_ROOT_PROJECT_MESSAGE, e.getMessage());
    }

    @Test
    void testRootDirectory() throws Exception {

    expected = assertThrows(PotentialDeadlockException.class, () -> lockA.lock());
    checkMessage(expected, "LockB -> LockA", "LockA -> LockB");
    // The causal chain should be cached.
    assertSame(firstException.getCause(), expected.getCause());
    // lockA should work after lockB is released.
    lockB.unlock();
    lockA.lock();
  }

  // Tests transitive deadlock detection.
  public void testDeadlock_threeLocks() {

        configuration.setResolveDependencies(true);

        try {
            return projectBuilder.build(pom, configuration).getProject();
        } catch (Exception e) {
            Throwable cause = e.getCause();
            if (cause instanceof ModelBuildingException modelBuildingException) {
                String message = "In: " + pom + "\n\n";
                for (ModelProblem problem : modelBuildingException.getProblems()) {

        this.cause = cause;
    }

    /**
     * Gets the cause of the build failure.
     *
     * @return The cause of the build failure or {@code null} if unknown.
     */
    public Throwable getCause() {
        return cause;
    }

        initRepoSession(configuration);

        try {
            return projectBuilder.build(pom, configuration).getProject();
        } catch (Exception e) {
            Throwable cause = e.getCause();
            if (cause instanceof ModelBuildingException modelBuildingException) {
                StringBuilder message = new StringBuilder("In: " + pom + "\n\n");

            } else {
                logger.error(entry.message());
                for (Throwable cause = entry.error();
                        cause != null && cause != cause.getCause();
                        cause = cause.getCause()) {
                    logger.log(entry.level(), "Caused by: " + cause.getMessage());
                }
            }
        }
    }