# Bus error w/ __PHP_Incomplete_Class - Thread: https://externals.io/message/8806 - Original archive: https://news-web.php.net/php.internals/8806 - Started by Timm Friebe on 2004-03-28T15:14:57+00:00 - Messages: 2 - Reply by email to internals@lists.php.net - More for agents: search with https://externals.io/search.md?q={query} · JSON API at https://externals.io/api · documentation at https://externals.io/llms.txt --- ## #8806 — Timm Friebe — 2004-03-28T15:14:57+00:00 URL: https://externals.io/message/8806#8806 Hi, accessing a non-existant member of (or calling a member function on) an instance of __PHP_Incomplete_Class results in a bus error: thekid@friebes:~/devel/php/php > cat incomplete_class.php member); ?> thekid@friebes:~/devel/php/php > php-dev incomplete_class.php object(__PHP_Incomplete_Class)#1 (2) { ["__PHP_Incomplete_Class_Name"]=> string(1) "a" ["value"]=> string(3) "100" } Bus error (core dumped) Expected output: a return value of `NULL` for access to a non-existant member and `E_ERROR` for trying to invoke a member function. -- gdb output -- Program received signal SIGBUS, Bus error. 0x828401b in zend_mm_create_new_free_block (heap=0x83b0cc8, mm_block=0x8639004, true_size=96) at /usr/home/thekid/devel/php/php/Zend/zend_mm.c:210 210 zend_mm_add_to_free_list(heap, new_free_block); Backtrace ends in an endless loop of: #0 0x828401b in zend_mm_create_new_free_block (heap=0x83b0cc8, mm_block=0x8639004, true_size=96) at /usr/home/thekid/devel/php/php/Zend/zend_mm.c:210 #1 0x82838b1 in zend_mm_alloc (heap=0x83b0cc8, size=84) at /usr/home/thekid/devel/php/php/Zend/zend_mm.c:341 #2 0x824bf4b in _emalloc (size=40, __zend_filename=0x82f8640 "/usr/home/thekid/devel/php/php/Zend/zend_object_handlers.c", __zend_lineno=675, __zend_orig_filename=0x0, __zend_orig_lineno=0) at /usr/home/thekid/devel/php/php/Zend/zend_alloc.c:168 #3 0x8281953 in zend_std_get_method (object=0x83c15d0, method_name=0x82f87a0 "__call", method_len=6, tsrm_ls=0x8399050) at /usr/home/thekid/devel/php/php/Zend/zend_object_handlers.c:675 #4 0x825d71c in zend_call_function (fci=0xbfb001fc, fci_cache=0x0, tsrm_ls=0x8399050) at /usr/home/thekid/devel/php/php/Zend/zend_execute_API.c:686 #5 0x825cf93 in call_user_function_ex (function_table=0x0, object_pp=0xbfb002d0, function_name=0xbfb00288, retval_ptr_ptr=0xbfb00274, param_count=2, params=0xbfb00278, no_separation=0, symbol_table=0x0, tsrm_ls=0x8399050) at /usr/home/thekid/devel/php/php/Zend/zend_execute_API.c:550 #6 0x828165a in zend_std_call_user_call (ht=2, return_value=0x8638e30, this_ptr=0x83c15d0, return_value_used=1, tsrm_ls=0x8399050) at /usr/home/thekid/devel/php/php/Zend/zend_object_handlers.c:565 #7 0x825e4ac in zend_call_function (fci=0xbfb003bc, fci_cache=0x0, tsrm_ls=0x8399050) at /usr/home/thekid/devel/php/php/Zend/zend_execute_API.c:853 #8 0x825cf93 in call_user_function_ex (function_table=0x0, object_pp=0xbfb00490, function_name=0xbfb00448, retval_ptr_ptr=0xbfb00434, param_count=2, params=0xbfb00438, no_separation=0, symbol_table=0x0, tsrm_ls=0x8399050) at /usr/home/thekid/devel/php/php/Zend/zend_execute_API.c:550 - Timm --- ## #9019 — Andi Gutmans — 2004-04-09T07:33:14+00:00 URL: https://externals.io/message/8806#9019 · In reply to: #8806 Not sure if I replied to the list but this should be fixed now. At 05:14 PM 3/28/2004 +0200, Timm Friebe wrote: >Hi, >accessing a non-existant member of (or calling a member function on) an >instance of __PHP_Incomplete_Class results in a bus error: > >thekid@friebes:~/devel/php/php > cat incomplete_class.php > $o= unserialize('O:1:"a":1:{s:5:"value";s:3:"100";}'); > var_dump($o); > var_dump($o->member); >?> >thekid@friebes:~/devel/php/php > php-dev incomplete_class.php >object(__PHP_Incomplete_Class)#1 (2) { > ["__PHP_Incomplete_Class_Name"]=> > string(1) "a" > ["value"]=> > string(3) "100" >} >Bus error (core dumped) > >Expected output: a return value of `NULL` for access to a non-existant >member and `E_ERROR` for trying to invoke a member function. > >-- gdb output -- >Program received signal SIGBUS, Bus error. >0x828401b in zend_mm_create_new_free_block (heap=0x83b0cc8, >mm_block=0x8639004, > true_size=96) at /usr/home/thekid/devel/php/php/Zend/zend_mm.c:210 >210 zend_mm_add_to_free_list(heap, new_free_block); > >Backtrace ends in an endless loop of: > >#0 0x828401b in zend_mm_create_new_free_block (heap=0x83b0cc8, >mm_block=0x8639004, > true_size=96) at /usr/home/thekid/devel/php/php/Zend/zend_mm.c:210 >#1 0x82838b1 in zend_mm_alloc (heap=0x83b0cc8, size=84) > at /usr/home/thekid/devel/php/php/Zend/zend_mm.c:341 >#2 0x824bf4b in _emalloc (size=40, > __zend_filename=0x82f8640 >"/usr/home/thekid/devel/php/php/Zend/zend_object_handlers.c", >__zend_lineno=675, __zend_orig_filename=0x0, __zend_orig_lineno=0) > at /usr/home/thekid/devel/php/php/Zend/zend_alloc.c:168 >#3 0x8281953 in zend_std_get_method (object=0x83c15d0, > method_name=0x82f87a0 "__call", method_len=6, tsrm_ls=0x8399050) > at /usr/home/thekid/devel/php/php/Zend/zend_object_handlers.c:675 >#4 0x825d71c in zend_call_function (fci=0xbfb001fc, fci_cache=0x0, >tsrm_ls=0x8399050) > at /usr/home/thekid/devel/php/php/Zend/zend_execute_API.c:686 >#5 0x825cf93 in call_user_function_ex (function_table=0x0, >object_pp=0xbfb002d0, > function_name=0xbfb00288, retval_ptr_ptr=0xbfb00274, param_count=2, > params=0xbfb00278, no_separation=0, symbol_table=0x0, >tsrm_ls=0x8399050) > at /usr/home/thekid/devel/php/php/Zend/zend_execute_API.c:550 >#6 0x828165a in zend_std_call_user_call (ht=2, return_value=0x8638e30, > this_ptr=0x83c15d0, return_value_used=1, tsrm_ls=0x8399050) > at /usr/home/thekid/devel/php/php/Zend/zend_object_handlers.c:565 >#7 0x825e4ac in zend_call_function (fci=0xbfb003bc, fci_cache=0x0, >tsrm_ls=0x8399050) > at /usr/home/thekid/devel/php/php/Zend/zend_execute_API.c:853 >#8 0x825cf93 in call_user_function_ex (function_table=0x0, >object_pp=0xbfb00490, > function_name=0xbfb00448, retval_ptr_ptr=0xbfb00434, param_count=2, > params=0xbfb00438, no_separation=0, symbol_table=0x0, >tsrm_ls=0x8399050) > at /usr/home/thekid/devel/php/php/Zend/zend_execute_API.c:550 > > >- Timm