Jan 20, 2026 · Jan 15, 2026 · Jan 15, 2026 · Jan 15, 2026 · Jan 16, 2026 · Jan 17, 2026
diff --git a/Lib/pdb.py b/Lib/pdb.py
 locals.update(pdb_eval["write_back"])
 eval_result=pdb_eval["result"]
 ifeval_resultisnotNone:
 print(repr(eval_result))
 self.message(repr(eval_result))

 returnTrue

diff --git a/Lib/test/test_remote_pdb.py b/Lib/test/test_remote_pdb.py
            self.assertIn("Function returned: 42", stdout)
            self.assertEqual(process.returncode, 0)

    def test_exec_in_closure_result_uses_pdb_stdout(self):
        """
        Expression results executed via _exec_in_closure() should be written
        to the debugger output stream (pdb stdout), not to sys.stdout.
        """
        self._create_script()
        process, client_file = self._connect_and_get_client_file()

        with kill_on_error(process):
            self._read_until_prompt(client_file)

            self._send_command(client_file, "(lambda: 123)()")
            messages = self._read_until_prompt(client_file)
            result_msg = "".join(msg.get("message", "") for msg in messages)
            self.assertIn("123", result_msg)

            self._send_command(client_file, "sum(i for i in (1, 2, 3))")
            messages = self._read_until_prompt(client_file)
            result_msg = "".join(msg.get("message", "") for msg in messages)
            self.assertIn("6", result_msg)

            self._send_command(client_file, "c")
            stdout, _ = process.communicate(timeout=SHORT_TIMEOUT)

            self.assertNotIn("\n123\n", stdout)
            self.assertNotIn("\n6\n", stdout)
            self.assertEqual(process.returncode, 0)


 def _supports_remote_attaching():
    PROCESS_VM_READV_SUPPORTED = False
diff --git a/Misc/NEWS.d/next/Library/2026-01-15-16-04-39.gh-issue-143874.1qQgvo.rst b/Misc/NEWS.d/next/Library/2026-01-15-16-04-39.gh-issue-143874.1qQgvo.rst
 Fixed a bug in :mod:`pdb` where expression results were not sent back to remote client.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -888,7 +888,7 @@ def _exec_in_closure(self, source, globals, locals):
		locals.update(pdb_eval["write_back"])
		eval_result=pdb_eval["result"]
		ifeval_resultisnotNone:
		print(repr(eval_result))
		self.message(repr(eval_result))

		returnTrue

Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -1441,6 +1441,34 @@ def test_multi_line_commands(self):
		self.assertIn("Function returned: 42", stdout)
		self.assertEqual(process.returncode, 0)

		def test_exec_in_closure_result_uses_pdb_stdout(self):
		"""
		Expression results executed via _exec_in_closure() should be written
		to the debugger output stream (pdb stdout), not to sys.stdout.
		"""
		self._create_script()
		process, client_file = self._connect_and_get_client_file()

		with kill_on_error(process):
		self._read_until_prompt(client_file)

		self._send_command(client_file, "(lambda: 123)()")
		messages = self._read_until_prompt(client_file)
		result_msg = "".join(msg.get("message", "") for msg in messages)
		self.assertIn("123", result_msg)

		self._send_command(client_file, "sum(i for i in (1, 2, 3))")
		messages = self._read_until_prompt(client_file)
		result_msg = "".join(msg.get("message", "") for msg in messages)
		self.assertIn("6", result_msg)

		self._send_command(client_file, "c")
		stdout, _ = process.communicate(timeout=SHORT_TIMEOUT)

		self.assertNotIn("\n123\n", stdout)
		self.assertNotIn("\n6\n", stdout)
		self.assertEqual(process.returncode, 0)


		def _supports_remote_attaching():
		PROCESS_VM_READV_SUPPORTED = False
Expand Down
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Fixed a bug in :mod:`pdb` where expression results were not sent back to remote client.