- Patch #877690 by catch, das-peter, mfer, Damien Tournoud: cannot upgrade...

- Patch #877690 by catch, das-peter, mfer, Damien Tournoud: cannot upgrade Drupal core if the comment module is enabled.

modules/comment/comment.install

@@ -90,7 +90,7 @@ function comment_update_dependencies() {
   );
 
   // Comment update 7012 creates the comment body field and therefore must run
-  // after all entities have been updated.
+  // after text module has been enabled and entities have been updated.
   $dependencies['comment'][7012] = array(
     'system' => 7021,
   );

modules/system/system.install

@@ -416,15 +416,6 @@ function system_requirements($phase) {
           );
           continue;
         }
-        // Check for a disabled dependency.
-        if (!$required_file->status) {
-          $requirements["$module-$required_module"] = array(
-            'title' => $t('Unresolved dependency'),
-            'description' => $t('@name requires this module.', array('@name' => $name)),
-            'value' => $t('@required_name (Disabled)', array('@required_name' => $required_name)),
-            'severity' => REQUIREMENT_ERROR,
-          );
-        }
       }
     }
   }

modules/system/system.test

@@ -1716,31 +1716,6 @@ class UpdateScriptFunctionalTest extends DrupalWebTestCase {
     $this->assertResponse(200);
   }
 
-  /**
-   * Tests the detection of requirements for the update script to proceed.
-   */
-  function testUpdateRequirements() {
-    $this->drupalLogin($this->update_user);
-    $this->drupalGet($this->update_url, array('external' => TRUE));
-    $this->assertResponse(200);
-    // Test if disabling a module that another enabled module depends on will
-    // prevent the update from proceeding.
-    module_disable(array('block'), FALSE);
-    $this->assertFalse(module_exists('block'), t('Block module is disabled.'));
-    $this->assertTrue(module_exists('dashboard'), t('Dashboard module is enabled.'));
-    $this->drupalGet($this->update_url, array('external' => TRUE));
-    $this->assertText(t('Unresolved dependency'), t('The update process cannot proceed when a module dependency is not enabled.'));
-
-    // Test if modules required by the current install profile are not required
-    // to be enabled for an update to proceed.
-    module_enable(array('block'));
-    $this->assertTrue(module_exists('block'), t('Block module is enabled.'));
-    module_disable(array('overlay'));
-    $this->assertFalse(module_exists('overlay'), t('Overlay module is disabled.'));
-    $this->drupalGet($this->update_url, array('external' => TRUE));
-    $this->assertNoText(t('Unresolved dependency'), t('The update process can proceed when modules from the install profile are disabled.'));
-  }
-
   /**
    * Tests the effect of using the update script on the theme system.
    */