fixer-quality-improv.diff

     def _initialize_info(self) -> None:
         """Import module and set `self.installed` and `self.version`."""
         self._version = None
         try:
             module = importlib.import_module(self.name)
         except (ImportError, ValueError):
             self._installed = False
             return
         else:
             self._installed = True
+        finally:
+            self._initialized = True
 
         for attribute_name in self._version_attributes:
             if hasattr(module, attribute_name):
                 version = getattr(module, attribute_name)
                 assert isinstance(version, (str, float))
                 self._version = str(version)
                 break
 
     def get_version(self) -> Optional[str]:
         """Finds the module version if it exists."""
         if not self._initialized:
             self._initialize_info()
         return self._version

self._initialized was being read but never updated in the ModuleInfo class.