+ .tmp.code:49:13: error: expected [five]number but variable 'x2' is [four]number
+ .tmp.code:48:8: info: this is where 'x2' was set to [four]number
+ .tmp.code:49:8: error: cannot assign value of type [five]number
+ .tmp.code:47:8: info: variable 'x1' was set as [five]number here.