[Bug libstdc++/56505] New: [4.7 Regression] cannot construct std::thread with pointer to member and non-pointer

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56505

             Bug #: 56505
           Summary: [4.7 Regression] cannot construct std::thread with
                    pointer to member and non-pointer
    Classification: Unclassified
           Product: gcc
           Version: 4.7.3
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: redi@gcc.gnu.org
        ReportedBy: redi@gcc.gnu.org


Switching std::thread to use __bind_simple broke this code, because std::mem_fn
can't handle rvalues:

#include <thread>

struct S {
    void f() { }
} s;

std::thread t(&S::f, s);


This was fixed on trunk by PR 55463 but is a regression since 4.6