Invalid type error omits type info

[Night-walker]

(dao) 1 + 'a'
[[ERROR]] in file "code string":
  At line 1 : Invalid expression --- " 1 + 'a' ";
  At line 1 : Invalid constant expression;
  At line 1 : Constant evaluation aborted with exception(s) --- 
[[Error::Type]] --- Invalid type:

In code snippet:
>>    0 :  DATA        :     0 ,     0 ,     0 ;     0;   
Raised by:  (), at instruction 0 in line 0 in file "interactive codes";