Description:
------------
a var_dump() of an object created with simplexml_load_string() 
segfaults. accessing one of the nodes first prevents this,
though one value that should be a simple string is coming
out as type UNKNOWN even then.


Reproduce code:
---------------
$xml = simplexml_load_string('<array><data><value>a</value><value>b</value></data></array>');
// uncomment either line to prevent segfault
// var_dump($xml->data);
// $foo = $xml->data;
var_dump($xml);

Expected result:
----------------
object(simplexml_element)#1 (1) {
  ["data"]=>
  object(simplexml_element)#3 (1) {
    ["value"]=>
    array(2) {
      [0]=>
      string(1) "a"
      [1]=>
      string(1) "b"
    }
  }
}

Actual result:
--------------
(gdb) run wow.php
Starting program: /usr/local/book/php/bin/php wow.php
[Switching to process 8904 thread 0xb03]
Reading symbols for shared libraries . done
Reading symbols for shared libraries ............ done
object(simplexml_element)#1 (1) {
  ["data"]=>
  [Tue Aug  5 17:36:34 2003]  Script:  'wow.php'
---------------------------------------
/Users/tater/book/php-src/Zend/zend_execute_API.c(354) : Block 0x00C72C88 status:
/Users/tater/book/php-src/Zend/zend_variables.c(45) : Actual location (location was relayed)
Beginning:      Overrun (magic=0x00000000, expected=0x7312F8DC)

Program received signal EXC_BAD_ACCESS, Could not access memory.
0x90074108 in memmove ()
(gdb) bt
#0  0x90074108 in memmove ()
#1  0x001fdf8c in _mem_block_check (ptr=0xc72cb0, silent=0, __zend_filename=0x2aa004 "/Users/tater/book/php-src/Zend/zend_execute_AI.c", __zend_lineno=354, __zend_orig_filename=0x2aa518 "/Users/tater/book/php-src/Zend/zend_variables.c", __zend_orig_lineno=45) at/Users/tater/book/php-src/Zend/zend_alloc.c:712
#2  0x001fdf44 in _mem_block_check (ptr=0xc72cb0, silent=1, __zend_filename=0x2aa004 "/Users/tater/book/php-src/Zend/zend_execute_AI.c", __zend_lineno=354, __zend_orig_filename=0x2aa518 "/Users/tater/book/php-src/Zend/zend_variables.c", __zend_orig_lineno=45) at/Users/tater/book/php-src/Zend/zend_alloc.c:704
#3  0x001fcbe4 in _efree (ptr=0xc72cb0, __zend_filename=0x2aa004 "/Users/tater/book/php-src/Zend/zend_execute_API.c", __zend_lineno354, __zend_orig_filename=0x2aa518 "/Users/tater/book/php-src/Zend/zend_variables.c", __zend_orig_lineno=45) at /Users/tater/book/pp-src/Zend/zend_alloc.c:259
#4  0x0021c288 in _zval_dtor (zvalue=0xafdda8, __zend_filename=0x2aa004 "/Users/tater/book/php-src/Zend/zend_execute_API.c", __zendlineno=354) at /Users/tater/book/php-src/Zend/zend_variables.c:45
#5  0x0020d434 in _zval_ptr_dtor (zval_ptr=0xafde04, __zend_filename=0x2aa518 "/Users/tater/book/php-src/Zend/zend_variables.c", __end_lineno=165) at /Users/tater/book/php-src/Zend/zend_execute_API.c:354
#6  0x0021c6d8 in _zval_ptr_dtor_wrapper (zval_ptr=0xafde04) at /Users/tater/book/php-src/Zend/zend_variables.c:165
#7  0x00226db4 in zend_hash_quick_add_or_update (ht=0xafdcd8, arKey=0xc72e20 "value", nKeyLength=6, h=574111618, pData=0xbfffd7d8, DataSize=4, pDest=0x0, flag=1) at /Users/tater/book/php-src/Zend/zend_hash.c:288
#8  0x0009e1ac in sxe_properties_get (object=0xafd9c0) at /Users/tater/book/php-src/ext/simplexml/simplexml.c:436
#9  0x0017fe30 in php_var_dump (struc=0xafdb94, level=3) at /Users/tater/book/php-src/ext/standard/var.c:97
#10 0x0017f9fc in php_array_element_dump (zv=0xafdb94, num_args=1, args=0xbfffd9a8 "", hash_key=0xbfffd960) at /Users/tater/book/ph-src/ext/standard/var.c:55
#11 0x00228b8c in zend_hash_apply_with_arguments (ht=0xafd8f0, destruct=0x17f940 <php_array_element_dump>, num_args=1) at /Users/taer/book/php-src/Zend/zend_hash.c:703
#12 0x0017ff98 in php_var_dump (struc=0xaf4db0, level=1) at /Users/tater/book/php-src/ext/standard/var.c:110
#13 0x001801e4 in zif_var_dump (ht=1, return_value=0xafca78, this_ptr=0x0, return_value_used=0) at /Users/tater/book/php-src/ext/stndard/var.c:151
#14 0x0024efa8 in zend_do_fcall_common_helper (execute_data=0xbfffdc80, op_array=0xafd268) at /Users/tater/book/php-src/Zend/zend_eecute.c:2514
#15 0x0024f888 in zend_do_fcall_handler (execute_data=0xbfffdc80, op_array=0xafd268) at /Users/tater/book/php-src/Zend/zend_executec:2647
#16 0x00248a44 in execute (op_array=0xafd268) at /Users/tater/book/php-src/Zend/zend_execute.c:1242
#17 0x0021efd8 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /Users/tater/book/php-src/Zend/zend.c:1032
#18 0x001c3764 in php_execute_script (primary_file=0xbffff6e0) at /Users/tater/book/php-src/main/main.c:1573
#19 0x00265e5c in main (argc=2, argv=0xbffffc60) at /Users/tater/book/php-src/sapi/cli/php_cli.c:910
#20 0x0000247c in _start (argc=2, argv=0xbffffc60, envp=0xbffffc6c) at /SourceCache/Csu/Csu-45/crt.c:267
#21 0x000022fc in start ()
(gdb)