diff --git a/c_src/pythonx/pythonx.cpp b/c_src/pythonx/pythonx.cpp
index a1477c1..f3d404e 100644
--- a/c_src/pythonx/pythonx.cpp
+++ b/c_src/pythonx/pythonx.cpp
@@ -104,7 +104,8 @@ class PyGILGuard {
 
   ~PyGILGuard() {
     std::cout << "before PyEval_SaveThread " << this->thread_id << std::endl;
-    PyEval_SaveThread();
+    auto t = PyEval_SaveThread();
+    std:: cout << "same state " << (t == thread_states[this->thread_id]) << std::endl;
     std::cout << "after PyEval_SaveThread " << this->thread_id << std::endl;
   }
 };