Merge branch '5.4' into 6.2

* 5.4:
  [Runtime][ErrorHandler] Don't mess with ini_set('assert.warning')

Author: nicolas-grekas

Debug.php

@@ -31,7 +31,6 @@ public static function enable(): ErrorHandler
 
         @ini_set('zend.assertions', 1);
         ini_set('assert.active', 1);
-        ini_set('assert.warning', 0);
         ini_set('assert.exception', 1);
 
         DebugClassLoader::enable();

Tests/ErrorHandlerTest.php

@@ -619,6 +619,7 @@ public function testAssertQuietEval()
             $this->markTestSkipped('zend.assertions is forcibly disabled');
         }
 
+        set_error_handler(function () {});
         $ini = [
             ini_set('zend.assertions', 1),
             ini_set('assert.active', 1),
@@ -627,6 +628,7 @@ public function testAssertQuietEval()
             ini_set('assert.callback', null),
             ini_set('assert.exception', 0),
         ];
+        restore_error_handler();
 
         $logger = new BufferingLogger();
         $handler = new ErrorHandler($logger);