[3.9] bpo-26053: Fix args echoed by pdb run command (pythonGH-25149)

* bpo-26053: Fix args echoed by pdb run command (pythonGH-22033)

(cherry picked from commit 652bfde)

* bpo-26053: Fix test_pdb.test_issue26053() (pythonGH-25139)

(cherry picked from commit bd4ab8e)

Lib/pdb.py

@@ -1708,7 +1708,7 @@ def main():
             print("The program finished and will be restarted")
         except Restart:
             print("Restarting", mainpyfile, "with arguments:")
-            print("\t" + " ".join(args))
+            print("\t" + " ".join(sys.argv[1:]))
         except SystemExit:
             # In most cases SystemExit does not warrant a post-mortem session.
             print("The program exited via sys.exit(). Exit status:", end=' ')

Lib/test/test_pdb.py

@@ -1443,6 +1443,19 @@ def test_issue16180(self):
             'Fail to handle a syntax error in the debuggee.'
             .format(expected, stdout))
 
+    def test_issue26053(self):
+        # run command of pdb prompt echoes the correct args
+        script = "print('hello')"
+        commands = """
+            continue
+            run a b c
+            run d e f
+            quit
+        """
+        stdout, stderr = self.run_pdb_script(script, commands)
+        res = '\n'.join([x.strip() for x in stdout.splitlines()])
+        self.assertRegex(res, "Restarting .* with arguments:\na b c")
+        self.assertRegex(res, "Restarting .* with arguments:\nd e f")
 
     def test_readrc_kwarg(self):
         script = textwrap.dedent("""

Misc/NEWS.d/next/Library/2020-09-01-10-12-13.bpo-26053.hXikw_.rst

@@ -0,0 +1 @@
+Fixed bug where the :mod:`pdb` interactive run command echoed the args from the shell command line, even if those have been overridden at the pdb prompt.