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-rw-r--r--Lib/email/_header_value_parser.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/email/_header_value_parser.py b/Lib/email/_header_value_parser.py
index 0cf23fc..7755e62 100644
--- a/Lib/email/_header_value_parser.py
+++ b/Lib/email/_header_value_parser.py
@@ -1520,13 +1520,18 @@ def get_obs_local_part(value):
raise
token, value = get_cfws(value)
obs_local_part.append(token)
+ if not obs_local_part:
+ raise errors.HeaderParseError(
+ "expected obs-local-part but found '{}'".format(value))
if (obs_local_part[0].token_type == 'dot' or
obs_local_part[0].token_type=='cfws' and
+ len(obs_local_part) > 1 and
obs_local_part[1].token_type=='dot'):
obs_local_part.defects.append(errors.InvalidHeaderDefect(
"Invalid leading '.' in local part"))
if (obs_local_part[-1].token_type == 'dot' or
obs_local_part[-1].token_type=='cfws' and
+ len(obs_local_part) > 1 and
obs_local_part[-2].token_type=='dot'):
obs_local_part.defects.append(errors.InvalidHeaderDefect(
"Invalid trailing '.' in local part"))