std::mutex::try_lock hangs when called from a static object constructor in a DLL

This happens with the MSVC 2013 compiler. I have a solution with 2 projects: .exe and .dll.
The .exe source code:

extern "C" int test_dll();

int main() {
    test_dll();

    return 0;
}

The .dll source code:

#include <mutex>

struct AAAA {
    AAAA() {
        std::mutex mutex;
        if (mutex.try_lock()) { // always blocks
            mutex.unlock();
        }
    };

} globalObject;

extern "C" __declspec(dllexport)
int  test_dll() {
    return true;
}

The try_lock call never returns. Here's the call stack:

msvcr120d.dll!Concurrency::details::ThreadScheduler::Create(const Concurrency::SchedulerPolicy & policy) Line 34
msvcr120d.dll!Concurrency::details::SchedulerBase::CreateWithoutInitializing(const Concurrency::SchedulerPolicy & policy) Line 285
msvcr120d.dll!Concurrency::details::SchedulerBase::GetDefaultScheduler() Line 654
msvcr120d.dll!Concurrency::details::SchedulerBase::CreateContextFromDefaultScheduler() Line 571
msvcr120d.dll!Concurrency::details::SchedulerBase::CurrentContext() Line 399
msvcr120d.dll!Concurrency::details::LockQueueNode::LockQueueNode(unsigned int timeout) Line 619
msvcr120d.dll!Concurrency::critical_section::try_lock() Line 1049
msvcp120d.dll!mtx_do_lock(_Mtx_internal_imp_t * * mtx, const xtime * target) Line 75
msvcp120d.dll!_Mtx_trylock(_Mtx_internal_imp_t * * mtx) Line 162
MutexDll.dll!std::_Mtx_trylockX(_Mtx_internal_imp_t * * _Mtx) Line 73
MutexDll.dll!std::_Mutex_base::try_lock() Line 46
MutexDll.dll!AAAA::AAAA() Line 8
MutexDll.dll!`dynamic initializer for 'AAA''() Line 21
[External Code]

This doesn't happen if the global object is created in the main .exe project. Only when in the DLL. What's going on here?