[PHP-BUG] Bug #68914 [NEW]: Reference survives beyond function scope

From:             steve dot piner at signify dot co dot nz
Operating system: Ubuntu 14.10
PHP version:      5.6.5
Package:          PHP Language Specification
Bug Type:         Bug
Bug description:Reference survives beyond function scope

Description:
------------
A reference created with a foreach loop appears to survive long after
the function creating the reference has exited.

Test script:
---------------
function f() {
  static $x;
  if(!$x) {
    $x = range(1, 3);
  }
  foreach($x as $i => &$j) { }
  return $x;
}
$z = f();
$y = f();
$y[2] = 'surprise';
print $z[2] . "\n";

Expected result:
----------------
3


Actual result:
--------------
surprise


-- 
Edit bug report at https://bugs.php.net/bug.php?id=68914&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=68914&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=68914&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=68914&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=68914&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=68914&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=68914&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=68914&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=68914&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=68914&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=68914&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=68914&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=68914&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=68914&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=68914&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=68914&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=68914&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=68914&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=68914&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=68914&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=68914&r=mysqlcfg