Fix test_tarfile (for not exporting LinkFallbackError) and remove the

non-strict test for unreadable symlinks, whch isn't supported before 3.13.

Author: Yhg1s

Lib/test/test_posixpath.py

@@ -707,22 +707,6 @@ def test_realpath_resolve_first(self, kwargs):
             safe_rmdir(ABSTFN + "/k")
             safe_rmdir(ABSTFN)
 
-    @os_helper.skip_unless_symlink
-    @skip_if_ABSTFN_contains_backslash
-    @unittest.skipIf(os.chmod not in os.supports_follow_symlinks, "Can't set symlink permissions")
-    @unittest.skipIf(sys.platform != "darwin", "only macOS requires read permission to readlink()")
-    def test_realpath_unreadable_symlink(self):
-        try:
-            os.symlink(ABSTFN+"1", ABSTFN)
-            os.chmod(ABSTFN, 0o000, follow_symlinks=False)
-            self.assertEqual(realpath(ABSTFN), ABSTFN)
-            self.assertEqual(realpath(ABSTFN + '/foo'), ABSTFN + '/foo')
-            self.assertEqual(realpath(ABSTFN + '/../foo'), dirname(ABSTFN) + '/foo')
-            self.assertEqual(realpath(ABSTFN + '/foo/..'), ABSTFN)
-        finally:
-            os.chmod(ABSTFN, 0o755, follow_symlinks=False)
-            os_helper.unlink(ABSTFN)
-
     @os_helper.skip_unless_symlink
     @skip_if_ABSTFN_contains_backslash
     @unittest.skipIf(os.chmod not in os.supports_follow_symlinks, "Can't set symlink permissions")

Lib/test/test_tarfile.py

@@ -2461,7 +2461,7 @@ def test__all__(self):
             "fully_trusted_filter", "data_filter",
             "tar_filter", "FilterError", "AbsoluteLinkError",
             "OutsideDestinationError", "SpecialFileError", "AbsolutePathError",
-            "LinkOutsideDestinationError",
+            "LinkOutsideDestinationError", "LinkFallbackError",
             }
         support.check__all__(self, tarfile, not_exported=not_exported)