lack of variable name in error message

[Cinderellahaha]

When I run this incorrect code in v8:
var a = 0; a();
The engine will give an error message as below:
Uncaught TypeError: a is not a function
at :1:12
But when I run the same code in quickjs, the engine will give the following message:
TypeError: is not a function
Compared to V8, the variable name is missing.