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-rw-r--r--sphinx/environment.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/sphinx/environment.py b/sphinx/environment.py
index c251ebf1f..aded55236 100644
--- a/sphinx/environment.py
+++ b/sphinx/environment.py
@@ -1560,7 +1560,7 @@ class BuildEnvironment:
if lckey[0:1] in lcletters:
return chr(127) + lckey
return lckey
- newlist = new.items()
+ newlist = list(new.items())
newlist.sort(key=keyfunc)
if group_entries: