[Python-checkins] bpo-43318: Fix a bug where pdb does not always echo cleared breakpoints (GH-24646) (GH-26674)

[iritkatriel]

https://github.com/python/cpython/commit/9c0180ae7761b352116a2528aae61eea10e31045
commit: 9c0180ae7761b352116a2528aae61eea10e31045
branch: 3.10
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: iritkatriel <1055913+iritkatriel at users.noreply.github.com>
date: 2021-06-11T17:18:19+01:00
summary:

bpo-43318: Fix a bug where pdb does not always echo cleared breakpoints (GH-24646) (GH-26674)

(cherry picked from commit 4cb6ba14325cff98589c2660d1d2c65f4aacfee4)

Co-authored-by: huzhaojie <hu.zj at foxmail.com>

files:
A Misc/NEWS.d/next/Library/2021-02-25-08-32-06.bpo-43318.bZJw6V.rst
M Lib/pdb.py
M Lib/test/test_pdb.py

diff --git a/Lib/pdb.py b/Lib/pdb.py
index 081a8449d4109..ff40f7b2476a3 100755
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -893,7 +893,7 @@ def do_clear(self, arg):
             except ValueError:
                 err = "Invalid line number (%s)" % arg
             else:
-                bplist = self.get_breaks(filename, lineno)
+                bplist = self.get_breaks(filename, lineno)[:]
                 err = self.clear_break(filename, lineno)
             if err:
                 self.error(err)
diff --git a/Lib/test/test_pdb.py b/Lib/test/test_pdb.py
index f944acd692043..3bece762558e4 100644
--- a/Lib/test/test_pdb.py
+++ b/Lib/test/test_pdb.py
@@ -1322,6 +1322,35 @@ def test_pdb_issue_20766():
     pdb 2: <built-in function default_int_handler>
     """
 
+def test_pdb_issue_43318():
+    """echo breakpoints cleared with filename:lineno
+
+    >>> def test_function():
+    ...     import pdb; pdb.Pdb(nosigint=True, readrc=False).set_trace()
+    ...     print(1)
+    ...     print(2)
+    ...     print(3)
+    ...     print(4)
+    >>> reset_Breakpoint()
+    >>> with PdbTestInput([  # doctest: +NORMALIZE_WHITESPACE
+    ...     'break 3',
+    ...     'clear <doctest test.test_pdb.test_pdb_issue_43318[0]>:3',
+    ...     'continue'
+    ... ]):
+    ...     test_function()
+    > <doctest test.test_pdb.test_pdb_issue_43318[0]>(3)test_function()
+    -> print(1)
+    (Pdb) break 3
+    Breakpoint 1 at <doctest test.test_pdb.test_pdb_issue_43318[0]>:3
+    (Pdb) clear <doctest test.test_pdb.test_pdb_issue_43318[0]>:3
+    Deleted breakpoint 1 at <doctest test.test_pdb.test_pdb_issue_43318[0]>:3
+    (Pdb) continue
+    1
+    2
+    3
+    4
+    """
+
 
 class PdbTestCase(unittest.TestCase):
     def tearDown(self):
diff --git a/Misc/NEWS.d/next/Library/2021-02-25-08-32-06.bpo-43318.bZJw6V.rst b/Misc/NEWS.d/next/Library/2021-02-25-08-32-06.bpo-43318.bZJw6V.rst
new file mode 100644
index 0000000000000..c2c9c8776fd86
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2021-02-25-08-32-06.bpo-43318.bZJw6V.rst
@@ -0,0 +1 @@
+Fix a bug where :mod:`pdb` does not always echo cleared breakpoints.