Undefined Behavior with the C++0x Closure: I

Question

Consider the example:

#include 
#include      // std::function
#include         // std::vector
#include 

        

Answer 1

(Edit: this certainly does not explain the ICE; I read the original question too hastily.)

The One problem in that code is that the lambdas returned from the adder function contain dangling references to the x variable that no longer exists. Capture by copy ([=] or [i]) instead of a reference ([&]) and everything should work.