PHP 4.0 Bug #9505: Pointer not set exception on a realloc

From: amra@us.ibm.com Operating system: OS400 PHP version: 4.0.4pl1 PHP Bug Type: Reproduceable crash Bug description: Pointer not set exception on a realloc Got the PHP to compile and build, now I am doing some simple tests. On initial invocation to PHP, I get the following exception: Message . . . . : Pointer not set for location referenced. Cause . . . . . : A pointer was used, either directly or as a basing pointer, that has not been set to an address. The exception was in c file zend_alloc.c, routine _erealloc(). The problem code is the first line: ZEND_API void *_erealloc(void *ptr, size_t size, int allow_failure ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) { zend_mem_header *p = (zend_mem_header *) ((char *)ptr-sizeof(zend_mem_header)-PLATFORM_PADDING); zend_mem_header *orig = p; DECLARE_CACHE_VARS ALS_FETCH(); if (!ptr) { return _emalloc(size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC); } . . . } The first line is referencing the pointer without checking if it is NULL. I moved the first 2 lines after the if-check and it cleared up the problem. -- Edit Bug report at: http://bugs.php.net/?id=9505&edit=1