fix: silence TypeError during tear down stage (#1027)

Co-authored-by: arithmetic1728 <58957152+arithmetic1728@users.noreply.github.com>

Author: lidizheng

packages/google-auth/google/auth/transport/requests.py

@@ -150,8 +150,14 @@ def __init__(self, session=None):
         self.session = session
 
     def __del__(self):
-        if hasattr(self, "session") and self.session is not None:
-            self.session.close()
+        try:
+            if hasattr(self, "session") and self.session is not None:
+                self.session.close()
+        except TypeError:
+            # NOTE: For certain Python binary built, the queue.Empty exception
+            # might not be considered a normal Python exception causing
+            # TypeError.
+            pass
 
     def __call__(
         self,

packages/google-auth/tests/transport/test_requests.py

@@ -57,6 +57,12 @@ def test_session_closed_on_del(self):
         request.__del__()
         http.close.assert_called_with()
 
+        http = mock.create_autospec(requests.Session, instance=True)
+        http.close.side_effect = TypeError("test injected TypeError")
+        request = google.auth.transport.requests.Request(http)
+        request.__del__()
+        http.close.assert_called_with()
+
 
 class TestTimeoutGuard(object):
     def make_guard(self, *args, **kwargs):