Revert "pythongh-94052: Don't re-run failed tests with --python option (

pythonGH-94054)"

This reverts commit 1347607.

Lib/test/libregrtest/cmdline.py

@@ -1,6 +1,5 @@
 import argparse
 import os
-import shlex
 import sys
 from test.support import os_helper
 
@@ -373,11 +372,8 @@ def _parse_args(args, **kwargs):
         parser.error("-s and -f don't go together!")
     if ns.use_mp is not None and ns.trace:
         parser.error("-T and -j don't go together!")
-    if ns.python is not None:
-        if ns.use_mp is None:
-            parser.error("-p requires -j!")
-        # The "executable" may be two or more parts, e.g. "node python.js"
-        ns.python = shlex.split(ns.python)
+    if ns.python is not None and ns.use_mp is None:
+        parser.error("-p requires -j!")
     if ns.failfast and not (ns.verbose or ns.verbose3):
         parser.error("-G/--failfast needs either -v or -W")
     if ns.pgo and (ns.verbose or ns.verbose2 or ns.verbose3):

Lib/test/libregrtest/main.py

@@ -306,22 +306,13 @@ def list_cases(self):
             printlist(self.skipped, file=sys.stderr)
 
     def rerun_failed_tests(self):
-        self.log()
-
-        if self.ns.python:
-            # Temp patch for https://github.com/python/cpython/issues/94052
-            self.log(
-                "Re-running failed tests is not supported with --python "
-                "host runner option."
-            )
-            return
-
         self.ns.verbose = True
         self.ns.failfast = False
         self.ns.verbose3 = False
 
         self.first_result = self.get_tests_result()
 
+        self.log()
         self.log("Re-running failed tests in verbose mode")
         rerun_list = list(self.need_rerun)
         self.need_rerun.clear()

Lib/test/libregrtest/runtest_mp.py

@@ -2,6 +2,7 @@
 import json
 import os
 import queue
+import shlex
 import signal
 import subprocess
 import sys
@@ -56,7 +57,8 @@ def run_test_in_subprocess(testname: str, ns: Namespace) -> subprocess.Popen:
     worker_args = (ns_dict, testname)
     worker_args = json.dumps(worker_args)
     if ns.python is not None:
-        executable = ns.python
+        # The "executable" may be two or more parts, e.g. "node python.js"
+        executable = shlex.split(ns.python)
     else:
         executable = [sys.executable]
     cmd = [*executable, *support.args_from_interpreter_flags(),