Issue #3319839 by alexpott: Exceptions in post updates are very broken since #3295625

      watchdog_exception('update', $e);

      $variables = Error::decodeException($e);

      unset($variables['backtrace'], $variables['exception']);

      unset($variables['backtrace'], $variables['exception'], $variables['severity_level']);

      $ret['#abort'] = [

        'success' => FALSE,

        'query' => t(Error::DEFAULT_ERROR_MESSAGE, $variables),

name: 'Post Update test failing'

type: module

description: 'Support module for update testing when a post update is failing.'

package: Testing

version: VERSION

<?php

/**

 * @file

 * Post update functions for test module.

 */

/**

 * Post update that throws an exception.

 */

function post_update_test_failing_post_update_exception() {

  throw new \RuntimeException('This post update fails');

}

<?php

namespace Drupal\Tests\system\Functional\UpdateSystem;

use Drupal\Core\Database\Database;

use Drupal\Tests\BrowserTestBase;

use Drupal\Tests\UpdatePathTestTrait;

/**

 * Tests hook_post_update() when there is an exception in a post update.

 *

 * @group Update

 */

class UpdatePostUpdateExceptionTest extends BrowserTestBase {

  use UpdatePathTestTrait;

  /**

   * {@inheritdoc}

   */

  protected $defaultTheme = 'stark';

  /**

   * {@inheritdoc}

   */

  protected function setUp(): void {

    parent::setUp();

    $connection = Database::getConnection();

    // Set the schema version.

    \Drupal::service('update.update_hook_registry')->setInstalledVersion('post_update_test_failing', 8000);

    // Update core.extension.

    $extensions = $connection->select('config')

      ->fields('config', ['data'])

      ->condition('collection', '')

      ->condition('name', 'core.extension')

      ->execute()

      ->fetchField();

    $extensions = unserialize($extensions);

    $extensions['module']['post_update_test_failing'] = 8000;

    $connection->update('config')

      ->fields([

        'data' => serialize($extensions),

      ])

      ->condition('collection', '')

      ->condition('name', 'core.extension')

      ->execute();

  }

  /**

   * Tests hook_post_update_NAME().

   */

  public function testPostUpdate() {

    // There are expected to be failed updates.

    $this->checkFailedUpdates = FALSE;

    $this->runUpdates();

    $this->assertSession()->pageTextContains('Failed: RuntimeException: This post update fails in post_update_test_failing_post_update_exception()');

  }

  /**

   * {@inheritdoc}

   */

  protected function doSelectionTest() {

    $this->assertSession()->assertEscaped("Post update that throws an exception.");

  }

}