Issue #3424290 check if file settings path exist

Closes #3424290

package_manager/tests/src/Kernel/PathExcluder/SiteFilesExcluderTest.php

@@ -55,4 +55,18 @@ class SiteFilesExcluderTest extends PackageManagerKernelTestBase {
     }
   }
 
+  /**
+   * Tests that invalid file settings do not cause errors.
+   */
+  public function testInvalidFileSettings() {
+    $invalid_path = '/path/does/not/exist';
+    $this->assertFileDoesNotExist($invalid_path);
+    $this->setSetting('file_public_path', $invalid_path);
+    $this->setSetting('file_private_path', $invalid_path);
+    // Ensure we have an up-to-date container.
+    $this->container = $this->container->get('kernel')->rebuildContainer();
+    $this->assertStatusCheckResults([]);
+    $this->assertResults([]);
+  }
+
 }