Description:
------------
A fatal error occurs when a method is called from a trait, which is implemented 
in the parent class of the class that utilises the trait.

Feels related to #55355 that was fixed.

Test script:
---------------
<?php

	trait Required
	{
		function setRequired()
		{
			$this->setAttribute('required', true);
			return $this;
		}
		
		abstract function setAttribute($name, $value);
	}	
	
	class Input
	{
		protected $attributes = [];
		
		function setAttribute($name, $value)
		{
			$this->attributes[$name] = $value;
		}
	}
	
	class Text extends Input
	{
		use Required;
	}
	
	$t = new Text();
	$t->setRequired();



Expected result:
----------------
No fatal error.

Actual result:
--------------
PHP Fatal error:  Call to undefined method Text::setAttribute() in 
/home/jared/Temp/trait2.php on line 7

Fatal error: Call to undefined method Text::setAttribute() in 
/home/jared/Temp/trait2.php on line 7