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[2011-03-24 16:48 UTC] atorkhov at gmail dot com
Description:
------------
PHP 5.2.17 crashes accessing object that is returned as $this from __get() handle (see code snapshot). If object is not global this code works fine.
PHP 5.2.10 did not crash in such situation.
Test script:
---------------
class test_class
{
public function __get($name)
{
return $this;
}
public function b()
{
return;
}
}
global $test3;
$test3 = new test_class();
$test3->a->b();
Expected result:
----------------
Nothing output.
Actual result:
--------------
Segmentation fault. Backtrace:
#0 zend_object_store_get_object (zobject=0x8da185c) at /home/alex/tmp/php-5.2.17/Zend/zend_objects_API.c:258
#1 0x082b08ac in zend_std_get_method (object_ptr=0xbfceb5a4, method_name=0x8da37f0 "b", method_len=1) at /home/alex/tmp/php-5.2.17/Zend/zend_object_handlers.c:801
#2 0x082bcf01 in ZEND_INIT_METHOD_CALL_SPEC_VAR_CONST_HANDLER (execute_data=0xbfceb580) at /home/alex/tmp/php-5.2.17/Zend/zend_vm_execute.h:9488
#3 0x082fea90 in execute (op_array=0x8da1d64) at /home/alex/tmp/php-5.2.17/Zend/zend_vm_execute.h:92
#4 0x082974c7 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /home/alex/tmp/php-5.2.17/Zend/zend.c:1134
#5 0x08256a94 in php_execute_script (primary_file=0xbfced940) at /home/alex/tmp/php-5.2.17/main/main.c:2036
#6 0x0830078c in main (argc=3, argv=0xbfceda74) at /home/alex/tmp/php-5.2.17/sapi/cli/php_cli.c:1165
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I can reproduce the issue using: <?php class test_class { public function __get($name) { return $this; } } global $test3; $test3 = new test_class(); var_dump($test3->a); ?> Your test gives me 'Fatal error: Call to a member function b() on a non-object'.