Description:
------------
According to the documentation, 
__callStatic() is triggered when invoking inaccessible methods in a static context.

If a method then is declared non-static with a __callStatic() handler in the class, accessing the method statically should route through __callStatic() instead of generating a fatal error as the method is inaccessible statically.

Test script:
---------------
<?php
	class Test
	{
		protected $root = '';

		public function __construct(string $root = '/')
		{
			$this->root = $root;
		}

		public static function bindTo(string $root = '/')
		{
			return new static($root);
		}

		public static function __callStatic($name, $arguments)
		{
			$instance = static::bindTo();
			return $instance->$name($arguments);
		}

		public function test() {
			return $this->root . '/foo';
		}
	}

	print Test::bindTo('/elsewhere')->test();
	print Test::test();

Expected result:
----------------
/elsewhere/foo
/foo

Actual result:
--------------
/elsewhere/foo
PHP Fatal error:  Uncaught Error: Non-static method Test::test() cannot be called statically