Edit report at http://bugs.php.net/bug.php?id=52939&edit=1
ID: 52939
Updated by: cataphr...@php.net
Reported by: cataphr...@php.net
Summary: zend_call_function does not respect
ZEND_SEND_PREFER_REF
Status: Closed
Type: Bug
Package: Scripting Engine problem
Operating System: Windows 7 x64
PHP Version: trunk-SVN-2010-09-28 (SVN)
Assigned To: dmitry
Block user comment: N
New Comment:
That does it.
On a minor note, the fix does an unnecessary zval separation. The need
to separate the zval if !fci->no_separation, the zval is not a reference
and the function expects a reference is because, presumably, if the
target function expects a reference, it may assume it has one and then
change the zval without separation. However, if it *prefers* a
reference, it presumably doesn't rely on having one and it's
(presumably...) safe not to separate the zval (see
http://bugs.php.net/patch-display.php?bug=52939&patch=zend_call_user_function_prefer_ref&revision=1285639039
)
Previous Comments:
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[2010-10-13 10:52:13] dmi...@php.net
This bug has been fixed in SVN.
Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
Thank you for the report, and for helping us make PHP better.
------------------------------------------------------------------------
[2010-10-13 10:51:41] dmi...@php.net
Automatic comment from SVN on behalf of dmitry
Revision: http://svn.php.net/viewvc/?view=revision&revision=304364
Log: Fixed bug #52939 (zend_call_function does not respect
ZEND_SEND_PREFER_REF)
------------------------------------------------------------------------
[2010-10-12 23:49:25] cataphr...@php.net
This last test is exactly the same thing, and still gives an error. The
only thing that would be different would be
call_user_func_array("array_multisort", array(array("row1" => 2, "row2"
=> 1)));
because now the inner array refcount would be 1 and in that case
zend_call_function flips is_ref.
This code
$args = array(array("row1" => 2, "row2" => 1));
call_user_func_array("array_multisort", $args);
should still pass $args[0] by value. The fact that it can't be modified
is irrelevant; array_multisort explicitly declares it can accept a value
(probably because it can accept multiple arrays and one may want to
modify only some).
------------------------------------------------------------------------
[2010-10-12 20:48:50] dmi...@php.net
Note that array($ar1) creates an array with a copy of $ar1 and its
modification doesn't affect the original $ar1 value. Probably the proper
test would be
<?php
$args = array(array("row1" => 2, "row2" => 1));
call_user_func_array("array_multisort", $args);
var_dump($args[0]);
?>
I'll check if it works tomorrow. But anyway it's not the thing you like.
------------------------------------------------------------------------
[2010-10-12 16:15:56] cataphr...@php.net
The test you added doesn't test the issue.
The problem is not zend_call_function + ZEND_SEND_PREF_REF not accepting
reference; it's not accepting values. This is the correct test:
<?php
var_dump(array_multisort(array("row1" => 2, "row2" => 1)));
$ar1 = array("row1" => 2, "row2" => 1);
var_dump(call_user_func_array("array_multisort", array($ar1)));
var_dump($ar1);
The "normal" call works, because even though it's a value, it's accepted
because of ZEND_SEND_PREFER_REF. The call via call_user_func_array still
fails because of this bug.
------------------------------------------------------------------------
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