fix reference leak in case of fatal errors during module setup

Cython/Compiler/ModuleNode.py

@@ -2140,8 +2140,11 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
         for cname, type in code.funcstate.all_managed_temps():
             code.put_xdecref(cname, type)
         code.putln('if (%s) {' % env.module_cname)
+        code.putln('if (%s) {' % env.module_dict_cname)
         code.put_add_traceback("init %s" % env.qualified_name)
-        env.use_utility_code(Nodes.traceback_utility_code)
+        code.globalstate.use_utility_code(Nodes.traceback_utility_code)
+        code.put_decref_clear(env.module_dict_cname, py_object_type, nanny=False)
+        code.putln('}')
         code.put_decref_clear(env.module_cname, py_object_type, nanny=False)
         code.putln('} else if (!PyErr_Occurred()) {')
         code.putln('PyErr_SetString(PyExc_ImportError, "init %s");' % env.qualified_name)