From 6b204274c02a8acb07cb23b7e048e89096d0b96a Mon Sep 17 00:00:00 2001
From: Damien Elmes <gpg@ankiweb.net>
Date: Thu, 5 Mar 2020 09:45:51 +1000
Subject: [PATCH] fix retain cycle caused by col.tr

We can't use a weakref.proxy with a method, so manually proxy the
call instead.
---
 pylib/anki/collection.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pylib/anki/collection.py b/pylib/anki/collection.py
index bd5795024..a7d159c73 100644
--- a/pylib/anki/collection.py
+++ b/pylib/anki/collection.py
@@ -83,7 +83,6 @@ class _Collection:
         log: bool = False,
     ) -> None:
         self.backend = backend
-        self.tr = backend.translate
         self._debugLog = log
         self.db = db
         self.path = db._path
@@ -112,6 +111,9 @@ class _Collection:
         n = os.path.splitext(os.path.basename(self.path))[0]
         return n
 
+    def tr(self, key: TR, **kwargs: Union[str, int, float]) -> str:
+        return self.backend.translate(key, **kwargs)
+
     # Scheduler
     ##########################################################################