Drupal 10.2.3-dev breaks Aggregator tests

Removed the related issue since I declared that to be a child of this issue.

I've applied the quick-fix to the blocks: specifying the canonical link template in toUrl(). This will allow us to see if the 🐛 Blocks cause WSOD; Cannot generate default URL Active change really does fix the "Congratulations, you upgraded Drupal!" failures shown here. Then we'll have greater confidence that the other issue's MR should be merged.

This issue's branch was rebased from 2.x since the block fix was committed. Here's the updated list of failures:

1) Drupal\Tests\aggregator\Functional\AggregatorRenderingTest::testBlockLinks
Behat\Mink\Exception\ResponseTextException: The text "feed-pjr4bka2jv" appears in the text of this page, but it should not.
/builds/project/aggregator/vendor/behat/mink/src/WebAssert.php:907
/builds/project/aggregator/vendor/behat/mink/src/WebAssert.php:312
/builds/project/aggregator/tests/src/Functional/AggregatorRenderingTest.php:84
/builds/project/aggregator/vendor/phpunit/phpunit/src/Framework/TestResult.php:728
2) Drupal\Tests\aggregator\Functional\ItemCacheTagsTest::testEntityCreation
TypeError: Drupal\Tests\system\Functional\Entity\EntityCacheTagsTestBase::verifyRenderCache(): Argument #1 ($keys) must be of type array, string given, called in /builds/project/aggregator/tests/src/Functional/ItemCacheTagsTest.php on line 75
/builds/project/aggregator/web/core/modules/system/tests/src/Functional/Entity/EntityCacheTagsTestBase.php:647
/builds/project/aggregator/tests/src/Functional/ItemCacheTagsTest.php:75
/builds/project/aggregator/vendor/phpunit/phpunit/src/Framework/TestResult.php:728
--
There were 2 failures:
1) Drupal\Tests\aggregator\Functional\migrate_drupal_ui\d6\UpgradeTest::testUpgrade
Failed asserting that two arrays are identical.
--- Expected
+++ Actual
@@ @@
 Array &0 (
     'aggregator_feed' => 1
     'aggregator_item' => 1
-    'block' => 36
+    'block' => 37
     'entity_view_display' => 58
     'entity_view_mode' => 14
     'view' => 16
 )
/builds/project/aggregator/vendor/phpunit/phpunit/src/Framework/Constraint/Constraint.php:121
/builds/project/aggregator/vendor/phpunit/phpunit/src/Framework/Constraint/IsIdentical.php:79
/builds/project/aggregator/tests/src/Functional/migrate_drupal_ui/MigrateUpgradeExecuteTestBase.php:90
/builds/project/aggregator/tests/src/Functional/migrate_drupal_ui/MigrateUpgradeExecuteTestBase.php:30
/builds/project/aggregator/vendor/phpunit/phpunit/src/Framework/TestResult.php:728
2) Drupal\Tests\aggregator\Functional\migrate_drupal_ui\d7\UpgradeTest::testUpgrade
Failed asserting that two arrays are identical.
--- Expected
+++ Actual
@@ @@
 Array &0 (
     'aggregator_feed' => 1
     'aggregator_item' => 10
-    'block' => 27
+    'block' => 28
     'entity_view_display' => 35
     'entity_view_mode' => 13
     'view' => 16
 )
/builds/project/aggregator/vendor/phpunit/phpunit/src/Framework/Constraint/Constraint.php:121
/builds/project/aggregator/vendor/phpunit/phpunit/src/Framework/Constraint/IsIdentical.php:79
/builds/project/aggregator/tests/src/Functional/migrate_drupal_ui/MigrateUpgradeExecuteTestBase.php:90
/builds/project/aggregator/tests/src/Functional/migrate_drupal_ui/MigrateUpgradeExecuteTestBase.php:30
/builds/project/aggregator/vendor/phpunit/phpunit/src/Framework/TestResult.php:728

The verifyRenderCache() error is related to this CR: https://www.drupal.org/node/3354596 → .

Teamwork for the win. Thank you again, @larowlan!

Automatically closed - issue fixed for 2 weeks with no activity.