gh-104301: Allow leading whitespace in disambiguated pdb statements (#104342)

1 files changed, 23 insertions, 0 deletions

diff --git a/Lib/test/test_pdb.py b/Lib/test/test_pdb.py
index 482c92d..037673d 100644
--- a/Lib/test/test_pdb.py
+++ b/Lib/test/test_pdb.py
@@ -1798,6 +1798,29 @@ def test_pdb_issue_gh_101517():
     (Pdb) continue
     """
 
+def test_pdb_ambiguous_statements():
+    """See GH-104301
+
+    Make sure that ambiguous statements prefixed by '!' are properly disambiguated
+
+    >>> with PdbTestInput([
+    ...     '! n = 42',  # disambiguated statement: reassign the name n
+    ...     'n',         # advance the debugger into the print()
+    ...     'continue'
+    ... ]):
+    ...     n = -1
+    ...     import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
+    ...     print(f"The value of n is {n}")
+    > <doctest test.test_pdb.test_pdb_ambiguous_statements[0]>(8)<module>()
+    -> print(f"The value of n is {n}")
+    (Pdb) ! n = 42
+    (Pdb) n
+    The value of n is 42
+    > <doctest test.test_pdb.test_pdb_ambiguous_statements[0]>(1)<module>()
+    -> with PdbTestInput([
+    (Pdb) continue
+    """
+
 
 @support.requires_subprocess()
 class PdbTestCase(unittest.TestCase):