Clearer error message

lib/Cake/TestSuite/Fixture/CakeTestFixture.php

@@ -265,6 +265,7 @@ public function drop($db) {
  *
  * @param DboSource $db An instance of the database into which the records will be inserted
  * @return boolean on success or if there are no records to insert, or false on failure
+ * @throws CakeException if count of values and fields does not match.
  */
 	public function insert($db) {
 		if (!isset($this->_insert)) {
@@ -277,10 +278,15 @@ public function insert($db) {
 				$fields = array_unique($fields);
 				$default = array_fill_keys($fields, null);
 				foreach ($this->records as $record) {
-					$values[] = array_values(array_merge($default, $record));
+					$merge = array_values(array_merge($default, $record));
+					if (count($fields) !== count($merge)) {
+						throw new CakeException('Fixure invalid: Count of fields does not match count of values');
+					}
+					$values[] = $merge;
 				}
 				$nested = $db->useNestedTransactions;
 				$db->useNestedTransactions = false;
+
 				$result = $db->insertMulti($this->table, $fields, $values);
 				if (
 					$this->primaryKey &&