From: dan at wep dot net
Operating system: Fedora Core 3
PHP version: 5.0.4
PHP Bug Type: Reproducible crash
Bug description: Calling assert() against local class var in __destruct()
causes segfault
Description:
------------
Attempts to access local class variables (defined or not) in a destructor
via an assertion causes a segfault.
Reproduce code:
---------------
<?php
class test {
private $localValue = 'a string';
function __destruct() {
print($this->localValue); // Works OK
assert('isset($this->localValue)'); // Segfaults
assert('isset($this->unknownValue)'); // Segfaults
}
}
$inst = new test();
?>
Expected result:
----------------
PHP Warning: assert(): Assertion "isset($this->unknownValue)" failed in
test.php on line 7
Actual result:
--------------
Segmentation fault
(gdb) bt
#0 0x081896bb in yy_push_state (new_state=6) at
Zend/zend_language_scanner.c:5990
#1 0x08185b0f in lex_scan (zendlval=0xbfffe874) at
Zend/zend_language_scanner.c:4021
#2 0x08194e68 in zendlex (zendlval=0xbfffe870) at
/usr/src/redhat/BUILD/php-5.0.4/Zend/zend_compile.c:3688
#3 0x08180ab5 in zendparse () at Zend/zend_language_parser.c:2221
#4 0x0818501b in compile_string (source_string=0xbfffe8c0,
filename=0x8361b6c "/home/dcox/test.php(6) : assert code")
at Zend/zend_language_scanner.c:3293
#5 0x0819866f in zend_eval_string (str=0x8362ebc
"isset($this->localValue)", retval_ptr=0xbfffe9b0,
string_name=0x8361b6c "/home/dcox/test.php(6) : assert code") at
/usr/src/redhat/BUILD/php-5.0.4/Zend/zend_execute_API.c:994
#6 0x08136410 in zif_assert (ht=1, return_value=0x835014c, this_ptr=0x0,
return_value_used=0)
at /usr/src/redhat/BUILD/php-5.0.4/ext/standard/assert.c:152
#7 0x081cbb0e in zend_do_fcall_common_helper (execute_data=0xbfffeac0,
opline=0x83619bc, op_array=0x8362c1c)
at /usr/src/redhat/BUILD/php-5.0.4/Zend/zend_execute.c:2727
#8 0x081cc2f9 in zend_do_fcall_handler (execute_data=0xbfffeac0,
opline=0x83619bc, op_array=0x8362c1c)
at /usr/src/redhat/BUILD/php-5.0.4/Zend/zend_execute.c:2859
#9 0x081c6cce in execute (op_array=0x8362c1c) at
/usr/src/redhat/BUILD/php-5.0.4/Zend/zend_execute.c:1406
#10 0x0819808a in zend_call_function (fci=0xbfffec80,
fci_cache=0xbfffec40)
at /usr/src/redhat/BUILD/php-5.0.4/Zend/zend_execute_API.c:852
#11 0x081b2ba0 in zend_call_method (object_pp=0xbfffed2c,
obj_ce=0x8361304, fn_proxy=0x0, function_name=0x820d6db "__destruct",
function_name_len=10, retval_ptr_ptr=0x0, param_count=0, arg1=0x0,
arg2=0x0)
at /usr/src/redhat/BUILD/php-5.0.4/Zend/zend_interfaces.c:86
#12 0x081b73fe in zend_objects_destroy_object (object=0x8350064,
handle=1)
at /usr/src/redhat/BUILD/php-5.0.4/Zend/zend_objects.c:78
#13 0x081b9982 in zend_objects_store_call_destructors (objects=0x82290a4)
at /usr/src/redhat/BUILD/php-5.0.4/Zend/zend_objects_API.c:54
#14 0x08196167 in shutdown_executor () at
/usr/src/redhat/BUILD/php-5.0.4/Zend/zend_execute_API.c:207
#15 0x081a2715 in zend_deactivate () at
/usr/src/redhat/BUILD/php-5.0.4/Zend/zend.c:817
#16 0x081636e1 in php_request_shutdown (dummy=0x0) at
/usr/src/redhat/BUILD/php-5.0.4/main/main.c:1216
#17 0x081d1fe5 in main (argc=3, argv=0xbffffa74) at
/usr/src/redhat/BUILD/php-5.0.4/sapi/cli/php_cli.c:1049
(gdb)
--
Edit bug report at http://bugs.php.net/?id=33165&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=33165&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=33165&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=33165&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=33165&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=33165&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=33165&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=33165&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=33165&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=33165&r=support
Expected behavior: http://bugs.php.net/fix.php?id=33165&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=33165&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=33165&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=33165&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=33165&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=33165&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=33165&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=33165&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=33165&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=33165&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=33165&r=mysqlcfg
