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
