==31137== Conditional jump or move depends on uninitialised value(s)
==31137==    at 0xE3A055E: Shiboken::GilState::release() (gilstate.cpp:43)
==31137==    by 0xE39EFF1: Shiboken::Object::destroy(SbkObject*, void*)
(basewrapper.cpp:1041)
==31137==    by 0xE3A2199: Shiboken::BindingManager::~BindingManager()
(bindingmanager.cpp:161)
==31137==    by 0x637E960: exit (exit.c:78)
==31137==    by 0x6363F05: (below main) (libc-start.c:258)

libshiboken/gilstate.cpp

GilState::GilState()
{
    if(Py_IsInitialized()) {
        m_gstate = PyGILState_Ensure();
        m_locked = true;
    }
}

'm_locked' is initialized only if python is still active
release() later depends on unitialized variable

void GilState::release()
{
    if(m_locked && Py_IsInitialized()) {
        PyGILState_Release(m_gstate);
        m_locked = false;
    }
}

propose:

GilState::GilState() : m_locked(false) {...}