From d39aed63a1f47a3c8b98ffe96339dfe45e70fad2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=A5=9E=E7=A7=98=E7=9A=84man?= <2755488504@qq.com>
Date: Sat, 31 Oct 2026 16:38:28 +0800
Subject: [PATCH] fix: Uncaught exception in get_normalizer_issues

OSS-Contributor-Artifact: ef910267c6341da49dc992f9b0e1b23051f4cbcbacb023a41dd5cc1336d2ab98
---
 parso/python/pep8.py             |  2 +-
 tests/test_oss_regression_219.py | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 tests/test_oss_regression_219.py

diff --git a/parso/python/pep8.py b/parso/python/pep8.py
index 47db445..43cc9c0 100644
--- a/parso/python/pep8.py
+++ b/parso/python/pep8.py
@@ -444,7 +444,7 @@ def _visit_part(self, part, spacing, leaf):
                         should_be_indentation = n.indentation
 
                         self._last_indentation_tos = n
-                        if n == node:
+                        if n == node or n.parent is None:
                             break
                         n = n.parent
 
diff --git a/tests/test_oss_regression_219.py b/tests/test_oss_regression_219.py
new file mode 100644
index 0000000..698e787
--- /dev/null
+++ b/tests/test_oss_regression_219.py
@@ -0,0 +1,21 @@
+import parso
+import pytest
+
+
+@pytest.mark.parametrize('newline', ['\n', '\r\n', '\r'])
+def test_comment_after_line_continuation(newline):
+    code = '\\' + newline + '#'
+    grammar = parso.load_grammar()
+    module = grammar.parse(code)
+
+    try:
+        issues = grammar._get_normalizer_issues(module)
+    except AttributeError as error:
+        raise AssertionError(
+            'A comment after a line continuation must not crash normalization'
+        ) from error
+
+    assert [(issue.code, issue.start_pos) for issue in issues] == [
+        (292, (2, 1))
+    ]
+    assert module.get_code() == code