diff --git a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php
index fe3a1fb..da0c9a7 100644
--- a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php
+++ b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php
@@ -49,7 +49,7 @@ public function validate($value, Constraint $constraint) {
     if ($typed_data instanceof StringInterface && !is_scalar($value)) {
       $valid = FALSE;
     }
-    if ($typed_data instanceof UriInterface && filter_var($value, FILTER_VALIDATE_URL) === FALSE) {
+    if ($typed_data instanceof UriInterface && $value !== '' && filter_var($value, FILTER_VALIDATE_URL) === FALSE) {
       $valid = FALSE;
     }
     // @todo: Move those to separate constraint validators.
@@ -67,6 +67,9 @@ public function validate($value, Constraint $constraint) {
     }
 
     if (!$valid) {
+      debug($value);
+      /** @var \Drupal\Core\TypedData\TypedDataInterface $typed_data */
+      debug($typed_data->getPropertyPath());
       // @todo: Provide a good violation message for each problem.
       $this->context->addViolation($constraint->message, array(
         '%value' => is_object($value) ? get_class($value) : (is_array($value) ? 'Array' : (string) $value)
diff --git a/core/modules/comment/src/CommentAccessControlHandler.php b/core/modules/comment/src/CommentAccessControlHandler.php
index 3b62b92..7775105 100644
--- a/core/modules/comment/src/CommentAccessControlHandler.php
+++ b/core/modules/comment/src/CommentAccessControlHandler.php
@@ -62,7 +62,6 @@ protected function checkFieldAccess($operation, FieldDefinitionInterface $field_
       $is_admin_edit = $items->getEntity()->id() && $account->hasPermission('administer comments');
       $admin_fields = array('created', 'uid', 'status');
       if (in_array($field_definition->getName(), $admin_fields)) {
-        var_dump($is_admin_edit, $field_definition->getName());
         return $is_admin_edit;
       }
 
@@ -71,7 +70,6 @@ protected function checkFieldAccess($operation, FieldDefinitionInterface $field_
         $entity = \Drupal::entityManager()->getStorage($comment->getCommentedEntityTypeId())->load($comment->getCommentedEntityId());
         $comment_field_definition = \Drupal::entityManager()->getFieldDefinitions($entity->getEntityTypeId(), $entity->bundle())[$comment->getFieldName()];
         $anonymous_contact = $comment_field_definition->getSetting('anonymous');
-        var_dump($is_admin_edit || ($account->isAnonymous() && $anonymous_contact != COMMENT_ANONYMOUS_MAYNOT_CONTACT), $field_definition->getName());
         return $is_admin_edit || ($account->isAnonymous() && $anonymous_contact != COMMENT_ANONYMOUS_MAYNOT_CONTACT);
       }
 
diff --git a/core/modules/comment/src/Tests/CommentAnonymousTest.php b/core/modules/comment/src/Tests/CommentAnonymousTest.php
index da4b453..17034b0 100644
--- a/core/modules/comment/src/Tests/CommentAnonymousTest.php
+++ b/core/modules/comment/src/Tests/CommentAnonymousTest.php
@@ -61,8 +61,8 @@ function testAnonymous() {
 
     // Ensure anonymous users cannot post in the name of registered users.
     $edit = array(
-      'name' => $this->admin_user->getUsername(),
-      'mail' => $this->randomMachineName() . '@example.com',
+      'name[0][value]' => $this->admin_user->getUsername(),
+      'mail[0][value]' => $this->randomMachineName() . '@example.com',
       'subject[0][value]' => $this->randomMachineName(),
       'comment_body[0][value]' => $this->randomMachineName(),
     );
@@ -86,7 +86,7 @@ function testAnonymous() {
     // Post comment with contact info (required).
     $author_name = $this->randomMachineName();
     $author_mail = $this->randomMachineName() . '@example.com';
-    $anonymous_comment3 = $this->postComment($this->node, $this->randomMachineName(), $this->randomMachineName(), array('name' => $author_name, 'mail' => $author_mail));
+    $anonymous_comment3 = $this->postComment($this->node, $this->randomMachineName(), $this->randomMachineName(), array('name[0][value]' => $author_name, 'mail[0][value]' => $author_mail));
     $this->assertTrue($this->commentExists($anonymous_comment3), 'Anonymous comment with contact info (required) found.');
 
     // Make sure the user data appears correctly when editing the comment.
diff --git a/core/modules/comment/src/Tests/CommentInterfaceTest.php b/core/modules/comment/src/Tests/CommentInterfaceTest.php
index 94e423c..f5af803 100644
--- a/core/modules/comment/src/Tests/CommentInterfaceTest.php
+++ b/core/modules/comment/src/Tests/CommentInterfaceTest.php
@@ -75,19 +75,19 @@ function testCommentInterface() {
     )));
 
     // Test changing the comment author to "Anonymous".
-    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), array('name' => ''));
+    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), array('name[0][value]' => ''));
     $this->assertTrue($comment->getAuthorName() == t('Anonymous') && $comment->getOwnerId() == 0, 'Comment author successfully changed to anonymous.');
 
     // Test changing the comment author to an unverified user.
     $random_name = $this->randomMachineName();
     $this->drupalGet('comment/' . $comment->id() . '/edit');
-    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), array('name' => $random_name));
+    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), array('name[0][value]' => $random_name));
     $this->drupalGet('node/' . $this->node->id());
     $this->assertText($random_name . ' (' . t('not verified') . ')', 'Comment author successfully changed to an unverified user.');
 
     // Test changing the comment author to a verified user.
     $this->drupalGet('comment/' . $comment->id() . '/edit');
-    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), array('name' => $this->web_user->getUsername()));
+    $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->getSubject(), array('name[0][value]' => $this->web_user->getUsername()));
     $this->assertTrue($comment->getAuthorName() == $this->web_user->getUsername() && $comment->getOwnerId() == $this->web_user->id(), 'Comment author successfully changed to a registered user.');
 
     $this->drupalLogout();
diff --git a/core/modules/comment/src/Tests/CommentPreviewTest.php b/core/modules/comment/src/Tests/CommentPreviewTest.php
index 8d188c3..ee77cfd 100644
--- a/core/modules/comment/src/Tests/CommentPreviewTest.php
+++ b/core/modules/comment/src/Tests/CommentPreviewTest.php
@@ -85,9 +85,9 @@ function testCommentEditPreviewSave() {
     $date = new DrupalDateTime('2008-03-02 17:23');
     $edit['subject[0][value]'] = $this->randomMachineName(8);
     $edit['comment_body[0][value]'] = $this->randomMachineName(16);
-    $edit['name'] = $web_user->getUsername();
-    $edit['date[date]'] = $date->format('Y-m-d');
-    $edit['date[time]'] = $date->format('H:i:s');
+    $edit['name[0][value]'] = $web_user->getUsername();
+    $edit['created[0][value][date]'] = $date->format('Y-m-d');
+    $edit['created[0][value][time]'] = $date->format('H:i:s');
     $raw_date = $date->getTimestamp();
     $expected_text_date = format_date($raw_date);
     $expected_form_date = $date->format('Y-m-d');
@@ -99,15 +99,15 @@ function testCommentEditPreviewSave() {
     $this->assertTitle(t('Preview comment | Drupal'), 'Page title is "Preview comment".');
     $this->assertText($edit['subject[0][value]'], 'Subject displayed.');
     $this->assertText($edit['comment_body[0][value]'], 'Comment displayed.');
-    $this->assertText($edit['name'], 'Author displayed.');
+    $this->assertText($edit['name[0][value]'], 'Author displayed.');
     $this->assertText($expected_text_date, 'Date displayed.');
 
     // Check that the subject, comment, author and date fields are displayed with the correct values.
     $this->assertFieldByName('subject[0][value]', $edit['subject[0][value]'], 'Subject field displayed.');
     $this->assertFieldByName('comment_body[0][value]', $edit['comment_body[0][value]'], 'Comment field displayed.');
-    $this->assertFieldByName('name', $edit['name'], 'Author field displayed.');
-    $this->assertFieldByName('date[date]', $edit['date[date]'], 'Date field displayed.');
-    $this->assertFieldByName('date[time]', $edit['date[time]'], 'Time field displayed.');
+    $this->assertFieldByName('name[0][value]', $edit['name[0][value]'], 'Author field displayed.');
+    $this->assertFieldByName('created[0][value][date]', $edit['created[0][value][date]'], 'Date field displayed.');
+    $this->assertFieldByName('created[0][value][time]', $edit['created[0][value][time]'], 'Time field displayed.');
 
     // Check that saving a comment produces a success message.
     $this->drupalPostForm('comment/' . $comment->id() . '/edit', $edit, t('Save'));
@@ -117,17 +117,17 @@ function testCommentEditPreviewSave() {
     $this->drupalGet('comment/' . $comment->id() . '/edit');
     $this->assertFieldByName('subject[0][value]', $edit['subject[0][value]'], 'Subject field displayed.');
     $this->assertFieldByName('comment_body[0][value]', $edit['comment_body[0][value]'], 'Comment field displayed.');
-    $this->assertFieldByName('name', $edit['name'], 'Author field displayed.');
-    $this->assertFieldByName('date[date]', $expected_form_date, 'Date field displayed.');
-    $this->assertFieldByName('date[time]', $expected_form_time, 'Time field displayed.');
+    $this->assertFieldByName('name[0][value]', $edit['name[0][value]'], 'Author field displayed.');
+    $this->assertFieldByName('created[0][value][date]', $expected_form_date, 'Date field displayed.');
+    $this->assertFieldByName('created[0][value][time]', $expected_form_time, 'Time field displayed.');
 
     // Submit the form using the displayed values.
     $displayed = array();
     $displayed['subject[0][value]'] = (string) current($this->xpath("//input[@id='edit-subject-0-value']/@value"));
     $displayed['comment_body[0][value]'] = (string) current($this->xpath("//textarea[@id='edit-comment-body-0-value']"));
-    $displayed['name'] = (string) current($this->xpath("//input[@id='edit-name']/@value"));
-    $displayed['date[date]'] = (string) current($this->xpath("//input[@id='edit-date-date']/@value"));
-    $displayed['date[time]'] = (string) current($this->xpath("//input[@id='edit-date-time']/@value"));
+    $displayed['name[0][value]'] = (string) current($this->xpath("//input[@id='edit-name-0-value']/@value"));
+    $displayed['created[0][value][date]'] = (string) current($this->xpath("//input[@id='edit-created-0-value-date']/@value"));
+    $displayed['created[0][value][time]'] = (string) current($this->xpath("//input[@id='edit-created-0-value-time']/@value"));
     $this->drupalPostForm('comment/' . $comment->id() . '/edit', $displayed, t('Save'));
 
     // Check that the saved comment is still correct.
@@ -136,7 +136,7 @@ function testCommentEditPreviewSave() {
     $comment_loaded = Comment::load($comment->id());
     $this->assertEqual($comment_loaded->getSubject(), $edit['subject[0][value]'], 'Subject loaded.');
     $this->assertEqual($comment_loaded->comment_body->value, $edit['comment_body[0][value]'], 'Comment body loaded.');
-    $this->assertEqual($comment_loaded->getAuthorName(), $edit['name'], 'Name loaded.');
+    $this->assertEqual($comment_loaded->getAuthorName(), $edit['name[0][value]'], 'Name loaded.');
     $this->assertEqual($comment_loaded->getCreatedTime(), $raw_date, 'Date loaded.');
     $this->drupalLogout();
 
diff --git a/core/modules/comment/src/Tests/CommentStatisticsTest.php b/core/modules/comment/src/Tests/CommentStatisticsTest.php
index 6b7bf01..901910f 100644
--- a/core/modules/comment/src/Tests/CommentStatisticsTest.php
+++ b/core/modules/comment/src/Tests/CommentStatisticsTest.php
@@ -97,7 +97,7 @@ function testCommentNodeCommentStatistics() {
 
     // Post comment #3 as anonymous.
     $this->drupalGet('comment/reply/node/' . $this->node->id() . '/comment');
-    $anonymous_comment = $this->postComment($this->node, $this->randomMachineName(), '', array('name' => $this->randomMachineName()));
+    $anonymous_comment = $this->postComment($this->node, $this->randomMachineName(), '', array('name[0][value]' => $this->randomMachineName()));
     $comment_loaded = Comment::load($anonymous_comment->id());
 
     // Checks the new values of node comment statistics with comment #3.
diff --git a/core/modules/comment/src/Tests/CommentTestBase.php b/core/modules/comment/src/Tests/CommentTestBase.php
index 05f139d..7e39c05 100644
--- a/core/modules/comment/src/Tests/CommentTestBase.php
+++ b/core/modules/comment/src/Tests/CommentTestBase.php
@@ -323,7 +323,7 @@ public function setCommentSettings($name, $value, $message, $field_name = 'comme
    *   Contact info is available.
    */
   function commentContactInfoAvailable() {
-    return preg_match('/(input).*?(name="name").*?(input).*?(name="mail").*?(input).*?(name="homepage")/s', $this->drupalGetContent());
+    return preg_match('/(input).*?(name="name\[0\]\[value\]").*?(input).*?(name="mail\[0\]\[value\]").*?(input).*?(name="homepage\[0\]\[value\]")/s', $this->drupalGetContent());
   }
 
   /**
diff --git a/core/modules/migrate_drupal/src/Tests/d6/MigrateFieldWidgetSettingsTest.php b/core/modules/migrate_drupal/src/Tests/d6/MigrateFieldWidgetSettingsTest.php
index 09b922c..da2076d 100644
--- a/core/modules/migrate_drupal/src/Tests/d6/MigrateFieldWidgetSettingsTest.php
+++ b/core/modules/migrate_drupal/src/Tests/d6/MigrateFieldWidgetSettingsTest.php
@@ -102,6 +102,7 @@ public function testWidgetSettings() {
     $component = $form_display->getComponent('field_test_email');
     $expected['type'] = 'email_default';
     $expected['weight'] = 4;
+    $expected['settings'] = array('size' => 60, 'placeholder' => '');
     $this->assertEqual($component, $expected, 'Email field settings are correct.');
 
     // Link field.
diff --git a/core/modules/rdf/src/Tests/CommentAttributesTest.php b/core/modules/rdf/src/Tests/CommentAttributesTest.php
index 82fd967..f291b6a 100644
--- a/core/modules/rdf/src/Tests/CommentAttributesTest.php
+++ b/core/modules/rdf/src/Tests/CommentAttributesTest.php
@@ -155,9 +155,9 @@ public function testCommentRdfaMarkup() {
 
     // Posts comment #2 as anonymous user.
     $anonymous_user = array();
-    $anonymous_user['name'] = $this->randomMachineName();
-    $anonymous_user['mail'] = 'tester@simpletest.org';
-    $anonymous_user['homepage'] = 'http://example.org/';
+    $anonymous_user['name[0][value]'] = $this->randomMachineName();
+    $anonymous_user['mail[0][value]'] = 'tester@simpletest.org';
+    $anonymous_user['homepage[0][value]'] = 'http://example.org/';
     $comment2 = $this->saveComment($this->node->id(), 0, $anonymous_user);
 
     // Tests comment #2 as anonymous user.