https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62189
Bug ID: 62189
Summary: Different result between 4.6 and 4.9.1
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: pangbw at gmail dot com
For this program, I get different result for G++ 4.6.3 and G++ 4.9.1, and I
have a C++ test suite which thinks 4.6.3 is right:
#include <functional>
#include <iostream>
int (*pfb_)() = nullptr;
int main()
{
std::function< int() > e (pfb_);
std::cout << !!e << std::endl;
return 0;
}
For 4.6.3 the output is 1 but for 4.9.1 the output is 0.
