为什么我查询数据库记录出现很奇怪的错误？

我的代码是这样的，

$users = DB::table('users')->when(false, function ($query) {
  $query->where('id',12)->get();
}, function ($query) {
  $query->where('id',8)->get();
});
return [$users];

{“connection”:{},”grammar”:{},”processor”:{},”bindings”:{“select”:[],”from”:[],”join”:[],”where”:[8],”groupBy”:[],”having”:[],”order”:[],”union”:[],”unionOrder”:[]},”aggregate”:null,”columns”:null,”distinct”:false,”from”:”users”,”joins”:null,”wheres”:[{“type”:”Basic”,”column”:”id”,”operator”:”=”,”value”:8,”boolean”:”and”}],”groups”:null,”havings”:null,”orders”:null,”limit”:null,”offset”:null,”unions”:null,”unionLimit”:null,”unionOffset”:null,”unionOrders”:null,”lock”:null,”operators”:[“=”,”<”,”>”,”<=”,”>=”,”<>”,”!=”,”<=>”,”like”,”like binary”,”not like”,”ilike”,”&”,”|”,”^”,”<<”,”>>”,”rlike”,”not rlike”,”regexp”,”not regexp”,”“,”*”,”!“,”!*”,”similar to”,”not similar to”,”not ilike”,”*”,”!*”],”useWritePdo”:false}