#44182 [NEW]: extract($a, EXTR_REFS) can fail to split copy-on-write references

From: robin_fernandes at uk dot ibm dot com Operating system: Windows PHP version: 5.2CVS-2008-02-20 (snap) PHP Bug Type: Arrays related Bug description: extract($a, EXTR_REFS) can fail to split copy-on-write references Description: ------------ extract($a, EXTR_REFS) does not always respect copy-on-write reference logic. In the testcase below, $nonRef is initially a copy-on-write reference to an element of $a. After the call to extract, it has become a real reference to an element of $a. This is reproducible on 5.2, 5.3 and 6.0 snaps. Reproduce code: --------------- <?php $a = array('foo' => 'original.foo'); $nonref = $a['foo']; $ref = &$a; extract($a, EXTR_REFS); $a['foo'] = 'changed.foo'; var_dump($nonref); //expecting original.foo ?> Expected result: ---------------- string(12) "original.foo" Actual result: -------------- string(11) "changed.foo" -- Edit bug report at http://bugs.php.net/?id=44182&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=44182&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=44182&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=44182&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=44182&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=44182&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=44182&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=44182&r=needscript Try newer version: http://bugs.php.net/fix.php?id=44182&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=44182&r=support Expected behavior: http://bugs.php.net/fix.php?id=44182&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=44182&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=44182&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=44182&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=44182&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=44182&r=dst IIS Stability: http://bugs.php.net/fix.php?id=44182&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=44182&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=44182&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=44182&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=44182&r=mysqlcfg