Merge branch '7.1' into 7.2

* 7.1:
  [FrameworkBundle] Add missing `not-compromised-password` entry in XSD
  [AssetMapper] Fix CssCompiler matches url in comments
  Add support for doctrine/persistence 4
  Ensure TransportExceptionInterface populates stream debug data
  Fix typo in validators.sk.xlf
  [Mime] Fix body validity check in `Email` when using `Message::setBody()`
  Review Arabic translations for the validator
  Fixed mistakes in proper hebrew writing in the previous translation and confirmed the rest to be correct and in the same style.
  Review translation
  [Cache] Don't clear system caches on cache:clear
  [FrameworkBundle] Fix patching refs to the tmp warmup dir in files generated by optional cache warmers
  Mark Czech Validator translation as reviewed
  [PropertyInfo] Fix `TypeTest` duplicated assert
  [Validator] Fix `Url` constraint attribute assertion
  convert legacy types to TypeInfo types if getType() is not implemented
  [HtmlSanitizer] Avoid accessing non existent array key when checking for hosts validity
  Update validators.ar.xlf
  [DomCrawler] Make `ChoiceFormField::isDisabled` return `true` for unchecked disabled checkboxes

Email.php

@@ -401,7 +401,7 @@ public function ensureValidity(): void
 
     private function ensureBodyValid(): void
     {
-        if (null === $this->text && null === $this->html && !$this->attachments) {
+        if (null === $this->text && null === $this->html && !$this->attachments && null === parent::getBody()) {
             throw new LogicException('A message must have a text or an HTML part or attachments.');
         }
     }

Tests/EmailTest.php

@@ -695,4 +695,60 @@ public function testEmailsWithAttachmentsWhichAreAFileInstanceCanBeUnserialized(
         $this->assertCount(1, $attachments);
         $this->assertStringContainsString('foo_bar_xyz_123', $attachments[0]->getBody());
     }
+
+    public function testInvalidBodyWithEmptyEmail()
+    {
+        $this->expectException(\LogicException::class);
+        $this->expectExceptionMessage('A message must have a text or an HTML part or attachments.');
+
+        (new Email())->ensureValidity();
+    }
+
+    public function testBodyWithTextIsValid()
+    {
+        $email = new Email();
+        $email->to('[email protected]')
+            ->from('[email protected]')
+            ->text('foo');
+
+        $email->ensureValidity();
+
+        $this->expectNotToPerformAssertions();
+    }
+
+    public function testBodyWithHtmlIsValid()
+    {
+        $email = new Email();
+        $email->to('[email protected]')
+            ->from('[email protected]')
+            ->html('foo');
+
+        $email->ensureValidity();
+
+        $this->expectNotToPerformAssertions();
+    }
+
+    public function testEmptyBodyWithAttachmentsIsValid()
+    {
+        $email = new Email();
+        $email->to('[email protected]')
+            ->from('[email protected]')
+            ->addPart(new DataPart('foo'));
+
+        $email->ensureValidity();
+
+        $this->expectNotToPerformAssertions();
+    }
+
+    public function testSetBodyIsValid()
+    {
+        $email = new Email();
+        $email->to('[email protected]')
+            ->from('[email protected]')
+            ->setBody(new TextPart('foo'));
+
+        $email->ensureValidity();
+
+        $this->expectNotToPerformAssertions();
+    }
 }