Don't check session._leave_alive twice

Author: NoahStapp

pymongo/asynchronous/command_cursor.py

@@ -240,7 +240,7 @@ async def _die_lock(self) -> None:
         self._sock_mgr = None
 
     def _end_session(self) -> None:
-        if self._session and self._session._implicit and not self._session._leave_alive:
+        if self._session and self._session._implicit:
             self._session._attached_to_cursor = False
             self._session._end_implicit_session()
             self._session = None

pymongo/asynchronous/database.py

@@ -1208,12 +1208,10 @@ async def _list_collection_names(
             if not filter or (len(filter) == 1 and "name" in filter):
                 kwargs["nameOnly"] = True
 
-        cursor = await self._list_collections_helper(session=session, **kwargs)
-        results = [result["name"] async for result in cursor]
-
-        await cursor.close()
-
-        return results
+        return [
+            result["name"]
+            async for result in await self._list_collections_helper(session=session, **kwargs)
+        ]
 
     async def list_collection_names(
         self,

pymongo/synchronous/command_cursor.py

@@ -240,7 +240,7 @@ def _die_lock(self) -> None:
         self._sock_mgr = None
 
     def _end_session(self) -> None:
-        if self._session and self._session._implicit and not self._session._leave_alive:
+        if self._session and self._session._implicit:
             self._session._attached_to_cursor = False
             self._session._end_implicit_session()
             self._session = None

pymongo/synchronous/database.py

@@ -1202,12 +1202,9 @@ def _list_collection_names(
             if not filter or (len(filter) == 1 and "name" in filter):
                 kwargs["nameOnly"] = True
 
-        cursor = self._list_collections_helper(session=session, **kwargs)
-        results = [result["name"] for result in cursor]
-
-        cursor.close()
-
-        return results
+        return [
+            result["name"] for result in self._list_collections_helper(session=session, **kwargs)
+        ]
 
     def list_collection_names(
         self,