From: Batuhan Taskaya <isidentical@gmail.com>
Date: Fri, 14 Jan 2022 02:01:44 +0000 (+0300)
Subject: Don't make redundant copies of the DFA (#2763)
X-Git-Url: https://git.madduck.net/etc/vim.git/commitdiff_plain/7a2956811534d7d20128ba6e911721749052b627?ds=inline

Don't make redundant copies of the DFA (#2763)
---

diff --git a/src/blib2to3/pgen2/parse.py b/src/blib2to3/pgen2/parse.py
index 4a23d53..a9dc11f 100644
--- a/src/blib2to3/pgen2/parse.py
+++ b/src/blib2to3/pgen2/parse.py
@@ -54,7 +54,7 @@ def stack_copy(
     stack: List[Tuple[DFAS, int, RawNode]]
 ) -> List[Tuple[DFAS, int, RawNode]]:
     """Nodeless stack copy."""
-    return [(copy.deepcopy(dfa), label, DUMMY_NODE) for dfa, label, _ in stack]
+    return [(dfa, label, DUMMY_NODE) for dfa, label, _ in stack]
 
 
 class Recorder: