protection: TRASH in delete

fixed a bug that it discovered


include/my_sys.h:
  move TRASH to my_sys.h from sql_list.h
sql/field.h:
  use TRASH macro
sql/item.h:
  TRASH in delete
sql/item_func.h:
  never delete item's manually!
sql/opt_range.cc:
  TRASH in delete
sql/sql_lex.h:
  TRASH in delete
sql/sql_list.h:
  move TRASH to my_sys.h from sql_list.h
sql/sql_parse.cc:
  don't use properties of deleted objects (even when it's safe)
sql/sql_select.cc:
  TRASH in delete
sql/sql_show.cc:
  TRASH in delete
sql/sql_string.h:
  TRASH in delete

1 files changed, 2 insertions, 2 deletions

diff --git a/sql/sql_string.h b/sql/sql_string.h
index 2101db40f92..cb9db52c830 100644
--- a/sql/sql_string.h
+++ b/sql/sql_string.h
@@ -72,9 +72,9 @@ public:
   static void *operator new(size_t size, MEM_ROOT *mem_root)
   { return (void*) alloc_root(mem_root, (uint) size); }
   static void operator delete(void *ptr_arg,size_t size)
-    {}
+  { TRASH(ptr_arg, size); }
   static void operator delete(void *ptr_arg,size_t size, MEM_ROOT *mem_root)
-    {}
+  { TRASH(ptr_arg, size); }
   ~String() { free(); }
 
   inline void set_charset(CHARSET_INFO *charset) { str_charset= charset; }