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-rw-r--r--Lib/email/header.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/email/header.py b/Lib/email/header.py
index 43220df7620..da739d58925 100644
--- a/Lib/email/header.py
+++ b/Lib/email/header.py
@@ -304,7 +304,7 @@ class Header:
self._continuation_ws, splitchars)
for string, charset in self._chunks:
lines = string.splitlines()
- formatter.feed(lines[0], charset)
+ formatter.feed(lines[0] if lines else '', charset)
for line in lines[1:]:
formatter.newline()
if charset.header_encoding is not None: