From 409e18286e5dcd0cba60726f8143847dfed743cf Mon Sep 17 00:00:00 2001
From: pukkandan <pukkandan.ytdlp@gmail.com>
Date: Fri, 3 Sep 2021 22:48:42 +0530
Subject: [PATCH] Fix `extra_info` being reused across runs
 58adec46773ee95be356daf88da7ac8a0ff1e703 was supposed to solve this, but
 ended up being an incomplete fix Closes #727

---
 yt_dlp/YoutubeDL.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/yt_dlp/YoutubeDL.py b/yt_dlp/YoutubeDL.py
index 913512387..cf8304c39 100644
--- a/yt_dlp/YoutubeDL.py
+++ b/yt_dlp/YoutubeDL.py
@@ -1166,7 +1166,7 @@ class YoutubeDL(object):
         for key, value in extra_info.items():
             info_dict.setdefault(key, value)
 
-    def extract_info(self, url, download=True, ie_key=None, extra_info={},
+    def extract_info(self, url, download=True, ie_key=None, extra_info=None,
                      process=True, force_generic_extractor=False):
         """
         Return a list with a dictionary for each video extracted.
@@ -1183,6 +1183,9 @@ class YoutubeDL(object):
         force_generic_extractor -- force using the generic extractor
         """
 
+        if extra_info is None:
+            extra_info = {}
+
         if not ie_key and force_generic_extractor:
             ie_key = 'Generic'