add debugging data for circleci

ddtrace/internal/module.py

@@ -324,6 +324,9 @@ def _check_installed(cls) -> None:
     def install(cls) -> None:
         """Install the module watchdog."""
         if cls.is_installed():
+            import traceback
+
+            traceback.print_stack()
             raise RuntimeError("%s is already installed" % cls.__name__)
 
         cls._instance = cls()