From c9758784eb321fb9771e0bc7205b296e4d658045 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Mon, 27 Nov 2017 16:57:07 +0100
Subject: bpo-27535: Fix memory leak with warnings ignore (#4489)

The warnings module doesn't leak memory anymore in the hidden
warnings registry for the "ignore" action of warnings filters.

The warn_explicit() function doesn't add the warning key to the
registry anymore for the "ignore" action.
---
 Lib/warnings.py | 1 -
 1 file changed, 1 deletion(-)

(limited to 'Lib/warnings.py')

diff --git a/Lib/warnings.py b/Lib/warnings.py
index c4bb22ec92..d7ea057a68 100644
--- a/Lib/warnings.py
+++ b/Lib/warnings.py
@@ -364,7 +364,6 @@ def warn_explicit(message, category, filename, lineno,
         action = defaultaction
     # Early exit actions
     if action == "ignore":
-        registry[key] = 1
         return
 
     # Prime the linecache for formatting, in case the
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