MDEV-19774 Assertion `sec.se c() <= 0x7FFFFFFFL' failed in Item_func_from_unixtime::get_date

mysql-test/main/func_time.result

@@ -6345,3 +6345,9 @@ NULL
 SELECT CONCAT(MAKETIME('01', '01', LEAST( -100, NULL )));
 CONCAT(MAKETIME('01', '01', LEAST( -100, NULL )))
 NULL
+#
+# MDEV-19774 Assertion `sec.se c() <= 0x7FFFFFFFL' failed in Item_func_from_unixtime::get_date
+#
+SELECT FROM_UNIXTIME(LEAST(3696610869, NULL));
+FROM_UNIXTIME(LEAST(3696610869, NULL))
+NULL

mysql-test/main/func_time.test

@@ -3170,3 +3170,10 @@ SET time_zone=DEFAULT;
 
 SELECT MAKETIME('01', '01', LEAST( -100, NULL ));
 SELECT CONCAT(MAKETIME('01', '01', LEAST( -100, NULL )));
+
+
+--echo #
+--echo # MDEV-19774 Assertion `sec.se c() <= 0x7FFFFFFFL' failed in Item_func_from_unixtime::get_date
+--echo #
+
+SELECT FROM_UNIXTIME(LEAST(3696610869, NULL));

sql/item_timefunc.cc

@@ -1933,7 +1933,7 @@ bool Item_func_from_unixtime::get_date(THD *thd, MYSQL_TIME *ltime,
   ltime->time_type= MYSQL_TIMESTAMP_TIME;
 
   VSec9 sec(thd, args[0], "unixtime", TIMESTAMP_MAX_VALUE);
-  DBUG_ASSERT(sec.sec() <= TIMESTAMP_MAX_VALUE);
+  DBUG_ASSERT(sec.is_null() || sec.sec() <= TIMESTAMP_MAX_VALUE);
 
   if (sec.is_null() || sec.truncated() || sec.neg())
     return (null_value= 1);
@@ -2601,8 +2601,8 @@ bool Item_func_maketime::get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzy
     return (null_value= 1);
 
   int warn;
-  new(ltime) Time(&warn, hour.neg(), hour.abs(), (uint) minute, sec,
-                  thd->temporal_round_mode(), decimals);
+  new(ltime) Time(&warn, hour.neg(), hour.abs(), (uint) minute,
+                  sec.to_const_sec9(), thd->temporal_round_mode(), decimals);
   if (warn)
   {
     // use check_time_range() to set ltime to the max value depending on dec

sql/sql_type.h

@@ -499,12 +499,42 @@ class Sec9: public Sec6
 };
 
 
-class VSec9: public Sec9
+class VSec9: protected Sec9
 {
   bool m_is_null;
+  Sec9& to_sec9()
+  {
+    DBUG_ASSERT(!is_null());
+    return *this;
+  }
 public:
   VSec9(THD *thd, Item *item, const char *type_str, ulonglong limit);
   bool is_null() const { return m_is_null; }
+  const Sec9& to_const_sec9() const
+  {
+    DBUG_ASSERT(!is_null());
+    return *this;
+  }
+  bool neg() const { return to_const_sec9().neg(); }
+  bool truncated() const { return to_const_sec9().truncated(); }
+  ulonglong sec() const { return to_const_sec9().sec(); }
+  long usec() const { return to_const_sec9().usec(); }
+  bool sec_to_time(MYSQL_TIME *ltime, uint dec) const
+  {
+    return to_const_sec9().sec_to_time(ltime, dec);
+  }
+  void make_truncated_warning(THD *thd, const char *type_str) const
+  {
+    return to_const_sec9().make_truncated_warning(thd, type_str);
+  }
+  Sec9 &round(uint dec)
+  {
+    return to_sec9().round(dec);
+  }
+  Sec9 &round(uint dec, time_round_mode_t mode)
+  {
+    return to_sec9().round(dec, mode);
+  }
 };