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-rw-r--r--Lib/email/errors.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/Lib/email/errors.py b/Lib/email/errors.py
index d52a624601..c04deb40ed 100644
--- a/Lib/email/errors.py
+++ b/Lib/email/errors.py
@@ -32,7 +32,7 @@ class CharsetError(MessageError):
# These are parsing defects which the parser was able to work around.
-class MessageDefect:
+class MessageDefect(Exception):
"""Base class for a message defect."""
def __init__(self, line=None):
@@ -55,3 +55,6 @@ class MalformedHeaderDefect(MessageDefect):
class MultipartInvariantViolationDefect(MessageDefect):
"""A message claimed to be a multipart but no subparts were found."""
+
+class InvalidMultipartContentTransferEncodingDefect(MessageDefect):
+ """An invalid content transfer encoding was set on the multipart itself."""