Difference between const auto and auto for lambda

Question

Is there any (useful?) Difference between:

auto test = [..](..){..}; 

and

 const auto test = [..](..){..}; 

?

Answer 1

Yes, if the lambda is declared mutable, then you cannot invoke it in the second case.

 int x = 0; const auto test = [x]() mutable { ++x; }; test(); // error