Fix zmq crash when calling shutdown with a pending inproc socket connect

src/ctx.cpp

@@ -126,15 +126,20 @@ zmq::ctx_t::~ctx_t ()
 
 int zmq::ctx_t::terminate ()
 {
-    // Connect up any pending inproc connections, otherwise we will hang
+	slot_sync.lock();
+
+	bool saveTerminating = terminating;
+	terminating = false;
+
+	// Connect up any pending inproc connections, otherwise we will hang
     pending_connections_t copy = pending_connections;
     for (pending_connections_t::iterator p = copy.begin (); p != copy.end (); ++p) {
         zmq::socket_base_t *s = create_socket (ZMQ_PAIR);
         s->bind (p->first.c_str ());
         s->close ();
     }
+	terminating = saveTerminating;
 
-    slot_sync.lock ();
     if (!starting) {
 
 #ifdef HAVE_FORK

tests/test_inproc_connect.cpp

@@ -471,6 +471,27 @@ void test_unbind ()
     assert (rc == 0);
 }
 
+void test_shutdown_during_pend ()
+{
+    void *ctx = zmq_ctx_new ();
+    assert (ctx);
+
+    // Connect first
+    void *connectSocket = zmq_socket (ctx, ZMQ_PAIR);
+    assert (connectSocket);
+    int rc = zmq_connect (connectSocket, "inproc://cbb");
+    assert (rc == 0);
+
+    zmq_ctx_shutdown (ctx);
+
+    // Cleanup
+    rc = zmq_close (connectSocket);
+    assert (rc == 0);
+
+    rc = zmq_ctx_term (ctx);
+    assert (rc == 0);
+}
+
 int main (void)
 {
     setup_test_environment ();
@@ -484,6 +505,7 @@ int main (void)
     test_identity ();
     test_connect_only ();
     test_unbind ();
+    test_shutdown_during_pend ();
 
     return 0;
 }