Difference between const auto and auto for lambdas

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 call it in the second case.

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