python · bitdancer · May 19, 2025 · May 19, 2025 · May 19, 2025
@@ -1020,6 +1020,8 @@ def _get_ptext_to_endchars(value, endchars):
    a flag that is True iff there were any quoted printables decoded.

    """
+    if not value:
+        return '', '', False
    fragment, *remainder = _wsp_splitter(value, 1)
    vchars = []
    escape = False

@@ -463,6 +463,19 @@ def test_get_qp_ctext_non_printables(self):
                                [errors.NonPrintableDefect], ')')
        self.assertEqual(ptext.defects[0].non_printables[0], '\x00')

+    def test_get_qp_ctext_close_paren_only(self):
+        self._test_get_x(parser.get_qp_ctext,
+                        ')', '', ' ', [], ')')
+
+    def test_get_qp_ctext_open_paren_only(self):
+        self._test_get_x(parser.get_qp_ctext,
+                        '(', '', ' ', [], '(')
+
+    def test_get_qp_ctext_no_end_char(self):
+        self._test_get_x(parser.get_qp_ctext,
+                        '', '', ' ', [], '')
+
+
    # get_qcontent

    def test_get_qcontent_only(self):
@@ -503,6 +516,14 @@ def test_get_qcontent_non_printables(self):
                                [errors.NonPrintableDefect], '"')
        self.assertEqual(ptext.defects[0].non_printables[0], '\x00')

+    def test_get_qcontent_empty(self):
+        self._test_get_x(parser.get_qcontent,
+                         '"', '', '', [], '"')
+
+    def test_get_qcontent_no_end_char(self):
+        self._test_get_x(parser.get_qcontent,
+                         '', '', '', [], '')
+
    # get_atext

    def test_get_atext_only(self):
@@ -1283,6 +1304,18 @@ def test_get_dtext_open_bracket_mid_word(self):
        self._test_get_x(parser.get_dtext,
                        'foo[bar', 'foo', 'foo', [], '[bar')

+    def test_get_dtext_open_bracket_only(self):
+        self._test_get_x(parser.get_dtext,
+                        '[', '', '', [], '[')
+
+    def test_get_dtext_close_bracket_only(self):
+        self._test_get_x(parser.get_dtext,
+                        ']', '', '', [], ']')
+
+    def test_get_dtext_empty(self):
+        self._test_get_x(parser.get_dtext,
+                        '', '', '', [], '')
+
    # get_domain_literal

    def test_get_domain_literal_only(self):

diff --git a/Misc/NEWS.d/next/Library/2025-05-19-10-32-11.gh-issue-134152.INJC2j.rst b/Misc/NEWS.d/next/Library/2025-05-19-10-32-11.gh-issue-134152.INJC2j.rst
@@ -0,0 +1,2 @@
+Fixed :exc:`UnboundLocalError` that could occur during :mod:`email` header
+parsing if an expected trailing delimiter is missing in some contexts.
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		Fixed :exc:`UnboundLocalError` that could occur during :mod:`email` header
		parsing if an expected trailing delimiter is missing in some contexts.