From:
Operating system: Any
PHP version: 5.4.3
Package: *Compile Issues
Bug Type: Bug
Bug description:Segfault during inheritance check on method
Description:
------------
When inherited method has different type hinting information for the method
parameters and E_STRICT error reporting level is set - PHP tries to report
method declaration incompatibility and segfaults on attempt to dereference
a null pointer.
Test script:
---------------
<?php
class A {}
class B {
public function b(A $a) {}
}
class C extends B {
public function b($a) {}
}
$a = new C();
Expected result:
----------------
Valid message explaining that inherited method has a different signature.
Actual result:
--------------
$ php a.php
Segmentation fault (core dumped)
...
(gdb) bt
#0 zend_get_function_declaration (fptr=0x0)
at /usr/src/debug/php-5.4.3/Zend/zend_compile.c:3046
#1 0x00000000005a2479 in do_inheritance_check_on_method (child=
0x7ffff7fc3558, parent=0x7ffff7fc3f18)
at /usr/src/debug/php-5.4.3/Zend/zend_compile.c:3267
#2 0x00000000005a2665 in do_inherit_method_check (
child_function_table=<value optimized out>, parent=<value optimized
out>,
hash_key=<value optimized out>, child_ce=0x7ffff7fc3310)
at /usr/src/debug/php-5.4.3/Zend/zend_compile.c:3288
#3 0x00000000005d3cf1 in zend_hash_replace_checker_wrapper (target=
0x7ffff7fc3338, source=<value optimized out>, pCopyConstructor=
0x5a7bc0 <do_inherit_method>, size=240, pMergeSource=
0x5a2620 <do_inherit_method_check>, pParam=0x7ffff7fc3310)
at /usr/src/debug/php-5.4.3/Zend/zend_hash.c:878
#4 zend_hash_merge_ex (target=0x7ffff7fc3338, source=<value optimized
out>,
pCopyConstructor=0x5a7bc0 <do_inherit_method>, size=240, pMergeSource=
0x5a2620 <do_inherit_method_check>, pParam=0x7ffff7fc3310)
at /usr/src/debug/php-5.4.3/Zend/zend_hash.c:892
#5 0x00000000005a850b in zend_do_inheritance (ce=0x7ffff7fc3310,
parent_ce=
0x7ffff7fc2ff8) at /usr/src/debug/php-5.4.3/Zend/zend_compile.c:3519
#6 0x00000000005a962c in do_bind_inherited_class (
op_array=<value optimized out>, opline=<value optimized out>,
class_table=
0xdf4c30, parent_ce=0x7ffff7fc2ff8, compile_time=1 '\001')
at /usr/src/debug/php-5.4.3/Zend/zend_compile.c:4569
#7 0x00000000005a985a in zend_do_early_binding ()
at /usr/src/debug/php-5.4.3/Zend/zend_compile.c:4626
#8 0x000000000058c1ca in zendparse ()
at /usr/src/debug/php-5.4.3/Zend/zend_language_parser.c:3547
#9 0x000000000058fa0d in compile_file (file_handle=0x7fffffffdec0,
type=<value optimized out>) at Zend/zend_language_scanner.l:579
#10 0x00007fffeb6d4042 in phar_compile_file (file_handle=0x7fffffffdec0,
type=
8) at /usr/src/debug/php-5.4.3/ext/phar/phar.c:3391
#11 0x00007ffff1d8101d in xdebug_compile_file (
file_handle=<value optimized out>, type=<value optimized out>)
at /usr/src/debug/php-pecl-xdebug-2.2.0/xdebug-2.2.0/xdebug.c:1537
#12 0x00000000005c70ca in zend_execute_scripts (type=8, retval=0x0,
file_count=
3) at /usr/src/debug/php-5.4.3/Zend/zend.c:1264
#13 0x0000000000566cc3 in php_execute_script (primary_file=0x7fffffffdec0)
at /usr/src/debug/php-5.4.3/main/main.c:2473
#14 0x0000000000672395 in do_cli (argc=2, argv=0x7fffffffe1f8)
at /usr/src/debug/php-5.4.3/sapi/cli/php_cli.c:983
#15 0x0000000000672cbc in main (argc=2, argv=0x7fffffffe1f8)
at /usr/src/debug/php-5.4.3/sapi/cli/php_cli.c:1356
--
Edit bug report at https://bugs.php.net/bug.php?id=62084&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=62084&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=62084&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=62084&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=62084&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=62084&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=62084&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=62084&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=62084&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=62084&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=62084&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=62084&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=62084&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=62084&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=62084&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=62084&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=62084&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=62084&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=62084&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=62084&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=62084&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=62084&r=mysqlcfg
