Description:
------------
When we specify a class name with scope resolution operator just before the class description. Then the incorrect syntax tree is parsed by zend parser.

When a word is typed after the scope resolution operator, then zend parses correct syntax tree.

This issue starts occurring from zend parser for php-5.6 onwards.

This issue only occurs in the scenario when scope resolution operator is specified for same class whose declaration has been specified in the next statement.

A digraph generated for the syntax tree has been specified in the expected result and actual result.

As you can see, when scope resolution operator is specified, the label "SMTP" related to class name gets removed. 

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

SMTP::

class SMTP
{
    const VERSION = '5.2.22';
}

?>

Expected result:
----------------
digraph dbg_AST {
rankdir=LR
node0 [shape=point, label="<notext>"]
node1 [shape=rect, label="SMTP"]
node0->node1
node2 [shape=octagon, label="SMTP"]
node0->node2
node3 [shape=point, label="<notext>"]
node2->node3
node4 [shape=point, label="<notext>"]
node2->node4
node5 [shape=point, label="<notext>"]
node4->node5
node6 [shape=hexagon, label="VERSION"]
node5->node6
node7 [shape=note, label="5.2.22"]
node6->node7
node8 [shape=rect, label="?>
¶"]
node0->node8
node9 [shape=rect, label="<internal>"]
node0->node9
node10 [shape=rect, label="
¶"]
node9->node10

}

Actual result:
--------------
digraph dbg_AST {
rankdir=LR
node0 [shape=point, label="<notext>"]
node1 [shape=point, label="<notext>"]
node0->node1
node2 [shape=note, label="5.2.22"]
node1->node2
node3 [shape=rect, label="?>
¶"]
node0->node3
node4 [shape=rect, label="<internal>"]
node0->node4
node5 [shape=rect, label="
¶"]
node4->node5

}