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-rw-r--r--Lib/rlcompleter.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/rlcompleter.py b/Lib/rlcompleter.py
index 3f970536dd..94f9341bee 100644
--- a/Lib/rlcompleter.py
+++ b/Lib/rlcompleter.py
@@ -29,6 +29,7 @@ Notes:
"""
+import atexit
import builtins
import __main__
@@ -158,3 +159,7 @@ except ImportError:
pass
else:
readline.set_completer(Completer().complete)
+ # Release references early at shutdown (the readline module's
+ # contents are quasi-immortal, and the completer function holds a
+ # reference to globals).
+ atexit.register(lambda: readline.set_completer(None))