problems with new zend_hash_destroy (current Zend CVS is instable)

<? function a() { } function b() { } function c() { } ?> causes: **** Purify instrumented ./php (pid 23582) **** FMR: Free memory read: * This is occurring while in: zend_hash_del_key_or_index [zend_hash.c:729] zend_unregister_functions [zend_API.c:773] module_destructor [zend_API.c:809] zend_hash_destroy [zend_hash.c:786] zend_shutdown [zend.c:376] php_module_shutdown [main.c:1002] * Reading 4 bytes from 0x391408 in the heap. * Address 0x391408 is at the beginning of a freed block of 37 bytes. * This block was allocated from: malloc [rtlib.o] zend_hash_add_or_update [zend_hash.c:205] do_bind_function_or_class [zend_compile.c:1036] do_early_binding [zend_compile.c:1120] zendparse [zend-parser.y:146] v_compile_files [zend-scanner.l:355] * There have been 682 frees since this block was freed. **** Purify instrumented ./php (pid 23582) **** FMR: Free memory read: * This is occurring while in: zend_hash_del_key_or_index [zend_hash.c:765] zend_unregister_functions [zend_API.c:773] module_destructor [zend_API.c:809] zend_hash_destroy [zend_hash.c:786] zend_shutdown [zend.c:376] php_module_shutdown [main.c:1002] * Reading 4 bytes from 0x391424 in the heap. * Address 0x391424 is 28 bytes into a freed block at 0x391408 of 37 bytes. * This block was allocated from: malloc [rtlib.o] zend_hash_add_or_update [zend_hash.c:205] do_bind_function_or_class [zend_compile.c:1036] do_early_binding [zend_compile.c:1120] zendparse [zend-parser.y:146] v_compile_files [zend-scanner.l:355] * There have been 682 frees since this block was freed. **** Purify instrumented ./php (pid 23582) **** FMW: Free memory write: * This is occurring while in: zend_hash_del_key_or_index [zend_hash.c:735] zend_unregister_functions [zend_API.c:773] module_destructor [zend_API.c:809] zend_hash_destroy [zend_hash.c:786] zend_shutdown [zend.c:376] php_module_shutdown [main.c:1002] * Writing 4 bytes to 0x391424 in the heap. * Address 0x391424 is 28 bytes into a freed block at 0x391408 of 37 bytes. * This block was allocated from: malloc [rtlib.o] zend_hash_add_or_update [zend_hash.c:205] do_bind_function_or_class [zend_compile.c:1036] do_early_binding [zend_compile.c:1120] zendparse [zend-parser.y:146] v_compile_files [zend-scanner.l:355] * There have been 682 frees since this block was freed.