[LLVMbugs] [Bug 21055] New: "std::function<void()> foo = std::bind(std::exit, 0)" does not compile

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=21055

            Bug ID: 21055
           Summary: "std::function<void()> foo = std::bind(std::exit, 0)"
                    does not compile
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: sami.liedes at iki.fi
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

As far as I can tell, this code is valid C++11:

------------------------------------------------------------
#include <functional>
#include <cstdlib>

int main() {
    std::function<void()> foo = std::bind(std::exit, 0);
}
------------------------------------------------------------

However it does not compile:

------------------------------------------------------------
$ clang++ -c -Wall -std=c++11 bind.cpp
In file included from bind.cpp:1:
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/functional:1606:21:
error: function cannot return function type '__func_type' (aka 'void (int)
__attribute__((noreturn))')
      typedef _Bind<__func_type(typename decay<_BoundArgs>::type...)> type;
                    ^
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/functional:1622:5:
note: in instantiation of template class 'std::_Bind_helper<false, void
(&)(int)
      __attribute__((noreturn)), int>' requested here
    _Bind_helper<__is_socketlike<_Func>::value, _Func, _BoundArgs...>::type
    ^
bind.cpp:16:33: note: while substituting deduced template arguments into
function template 'bind' [with _Func = void (&)(int) __attribute__((noreturn)),
_BoundArgs = <int>]
    std::function<void()> bar = std::bind(std::exit, 0);
                                ^
bind.cpp:16:33: error: no matching function for call to 'bind'
    std::function<void()> bar = std::bind(std::exit, 0);
                                ^~~~~~~~~
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/functional:1650:5:
note: candidate template ignored: couldn't infer template argument '_Result'
    bind(_Func&& __f, _BoundArgs&&... __args)
    ^
/usr/lib/gcc/x86_64-linux-gnu/4.9/../../../../include/c++/4.9/functional:1623:5:
note: candidate template ignored: substitution failure [with _Func = void
(&)(int)
      __attribute__((noreturn)), _BoundArgs = <int>]
    bind(_Func&& __f, _BoundArgs&&... __args)
    ^
2 errors generated.
------------------------------------------------------------

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