Bug#12584302 AFTER FIX FOR #12403504: ASSERTION FAILED: DELSUM+(INT) Y/4-TEMP > 0,

The problem is that TIME_FUZZY_DATE is explicitly used for get_arg0_date()
function in Item_date_typecast::get_date method. The fix is to use real
fuzzy_date value.

mysql-test/r/func_time.result

@@ -1426,4 +1426,10 @@ NULL
 SELECT WEEK(DATE_ADD(FROM_DAYS(1),INTERVAL 1 MONTH), 1);
 WEEK(DATE_ADD(FROM_DAYS(1),INTERVAL 1 MONTH), 1)
 NULL
+#
+# Bug#12584302 AFTER FIX FOR #12403504: ASSERTION FAILED: DELSUM+(INT) Y/4-TEMP > 0,
+#
+DO WEEK((DATE_ADD((CAST(0 AS DATE)), INTERVAL 1 YEAR_MONTH)), 5);
+Warnings:
+Warning	1292	Incorrect datetime value: '0'
 End of 5.1 tests

mysql-test/t/func_time.test

@@ -928,4 +928,10 @@ SELECT DATE_FORMAT('0000-00-11', '%w');
 SELECT MAKEDATE(11111111,1);
 SELECT WEEK(DATE_ADD(FROM_DAYS(1),INTERVAL 1 MONTH), 1);
 
+--echo #
+--echo # Bug#12584302 AFTER FIX FOR #12403504: ASSERTION FAILED: DELSUM+(INT) Y/4-TEMP > 0,
+--echo #
+
+DO WEEK((DATE_ADD((CAST(0 AS DATE)), INTERVAL 1 YEAR_MONTH)), 5);
+
 --echo End of 5.1 tests

sql/item_timefunc.cc

@@ -2646,7 +2646,7 @@ String *Item_time_typecast::val_str(String *str)
 
 bool Item_date_typecast::get_date(MYSQL_TIME *ltime, uint fuzzy_date)
 {
-  bool res= get_arg0_date(ltime, TIME_FUZZY_DATE);
+  bool res= get_arg0_date(ltime, fuzzy_date);
   ltime->hour= ltime->minute= ltime->second= ltime->second_part= 0;
   ltime->time_type= MYSQL_TIMESTAMP_DATE;
   return res;