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--TEST--
Bug #42177 (Warning "array_merge_recursive(): recursion detected" comes again...)
--FILE--
<?php
$a1 = array( 'key1' => 1, 'key3' => 2 );
$a2 = array();
$a1 = array_merge_recursive( $a1, $a2 );
$a1 = array_merge_recursive( $a1, $a2 );
unset( $a1, $a2 );
$a1 = array();
$a2 = array( 'key1' => 1, 'key3' => 2 );
$a1 = array_merge_recursive( $a1, $a2 );
$a1 = array_merge_recursive( $a1, $a2 );
unset( $a1, $a2 );
$a1 = array();
$a2 = array( 'key1' => &$a1 );
$a1 = array_merge_recursive( $a1, $a2 );
$a1 = array_merge_recursive( $a1, $a2 );
unset( $a1, $a2 );
$x = 'foo';
$y =& $x;
$a1 = array($x, $y, $x, $y);
$a2 = array( 'key1' => $a1, $x, $y );
$a1 = array_merge_recursive( $a1, $a2 );
$a1 = array_merge_recursive( $a1, $a2 );
unset( $a1, $a2 );
?>
--EXPECTF--
Warning: array_merge_recursive(): recursion detected in %s on line 18
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