bpo-32381: pymain_run_command() uses PyCF_IGNORE_COOKIE (GH-23724)

The coding cookie (ex: "# coding: latin1") is now ignored in the
command passed to the -c command line option.

Since pymain_run_command() uses UTF-8, pass PyCF_IGNORE_COOKIE
compiler flag to the parser.

pymain_run_python() no longer propages compiler flags between
function calls.

1 files changed, 8 insertions, 0 deletions

diff --git a/Lib/test/test_cmd_line.py b/Lib/test/test_cmd_line.py
index fa3329efa28..f12dff3202f 100644
--- a/Lib/test/test_cmd_line.py
+++ b/Lib/test/test_cmd_line.py
@@ -153,6 +153,14 @@ class CmdLineTest(unittest.TestCase):
                    % (os_helper.FS_NONASCII, ord(os_helper.FS_NONASCII)))
         assert_python_ok('-c', command)
 
+    @unittest.skipUnless(os_helper.FS_NONASCII, 'need os_helper.FS_NONASCII')
+    def test_coding(self):
+        # bpo-32381: the -c command ignores the coding cookie
+        ch = os_helper.FS_NONASCII
+        cmd = f"# coding: latin1\nprint(ascii('{ch}'))"
+        res = assert_python_ok('-c', cmd)
+        self.assertEqual(res.out.rstrip(), ascii(ch).encode('ascii'))
+
     # On Windows, pass bytes to subprocess doesn't test how Python decodes the
     # command line, but how subprocess does decode bytes to unicode. Python
     # doesn't decode the command line because Windows provides directly the