MDEV-14409 Assertion `page_rec_is_leaf(rec)' failed in lock_rec_validate_page

lock_rec_queue_validate(): Assert page_rec_is_leaf(rec), except when
the record is a page infimum or supremum.

lock_rec_validate_page(): Relax the assertion that failed.
The assertion was reachable when the record lock bitmap was empty.

lock_rec_insert_check_and_lock(): Assert page_is_leaf().

storage/innobase/lock/lock0lock.cc

@@ -5485,6 +5485,8 @@ lock_rec_queue_validate(
 		goto func_exit;
 	}
 
+	ut_ad(page_rec_is_leaf(rec));
+
 	if (index == NULL) {
 
 		/* Nothing we can do */
@@ -5646,11 +5648,13 @@ lock_rec_validate_page(
 	if (!sync_check_find(SYNC_FSP))
 	for (i = nth_bit; i < lock_rec_get_n_bits(lock); i++) {
 
-		if (i == 1 || lock_rec_get_nth_bit(lock, i)) {
+		if (i == PAGE_HEAP_NO_SUPREMUM
+		    || lock_rec_get_nth_bit(lock, i)) {
 
 			rec = page_find_rec_with_heap_no(block->frame, i);
 			ut_a(rec);
-			ut_ad(page_rec_is_leaf(rec));
+			ut_ad(!lock_rec_get_nth_bit(lock, i)
+			      || page_rec_is_leaf(rec));
 			offsets = rec_get_offsets(rec, lock->index, offsets,
 						  true, ULINT_UNDEFINED,
 						  &heap);
@@ -5886,7 +5890,7 @@ lock_rec_insert_check_and_lock(
 {
 	ut_ad(block->frame == page_align(rec));
 	ut_ad(!dict_index_is_online_ddl(index)
-	      || dict_index_is_clust(index)
+	      || index->is_primary()
 	      || (flags & BTR_CREATE_FLAG));
 	ut_ad(mtr->is_named_space(index->space));
 
@@ -5895,7 +5899,8 @@ lock_rec_insert_check_and_lock(
 		return(DB_SUCCESS);
 	}
 
-	ut_ad(!dict_table_is_temporary(index->table));
+	ut_ad(!index->table->is_temporary());
+	ut_ad(page_is_leaf(block->frame));
 
 	dberr_t		err;
 	lock_t*		lock;