#45335 [NEW]: By-value assignment is ignored if that variable contains a reference

From: kosthorst at apobyte dot de Operating system: Debian Etch PHP version: 5.2.6 PHP Bug Type: Variables related Bug description: By-value assignment is ignored if that variable contains a reference Description: ------------ I assign something by-reference to a variable. If I assign the same stuff again to the same variable by-value, this assignment is ignored. In the reproduce code, $bar first is a reference to $foo. $bar is modified via array_pop(). This modifies $foo, too. Then, $foo is assigned to $bar by-value. Again, $bar is modified via array_pop(). And again, $foo is modified too, which should not happen, because $bar should not be a reference to $foo any more. An unset($bar); right before the second assignment fixes the issue. Reproduce code: --------------- $foo = array(1, 2, 3, 4, 5); $bar =& $foo; array_pop($bar); var_dump($foo); $bar = $foo; array_pop($bar); var_dump($foo); Expected result: ---------------- array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) } array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) } Actual result: -------------- array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) } array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) } -- Edit bug report at http://bugs.php.net/?id=45335&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=45335&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=45335&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=45335&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=45335&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=45335&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=45335&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=45335&r=needscript Try newer version: http://bugs.php.net/fix.php?id=45335&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=45335&r=support Expected behavior: http://bugs.php.net/fix.php?id=45335&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=45335&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=45335&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=45335&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45335&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=45335&r=dst IIS Stability: http://bugs.php.net/fix.php?id=45335&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=45335&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=45335&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=45335&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=45335&r=mysqlcfg