commit 2a1ee1d970460047bd88da9638f8c1789431d9ab
author Guido van Rossum <guido@python.org> Sat Jun 27 17:34:30 2020 -0700
committer GitHub <noreply@github.com> Sat Jun 27 17:34:30 2020 -0700
tree f9d788be367da763dc8d712b78aa5005c3d0dd35
parent dab533d0ee067159812d4ea51f6fbbb1bd37d8b7

[3.9] bpo-35975: Only use cf_feature_version if PyCF_ONLY_AST in cf_flags (#21022)

Parser/pegen/pegen.c

diff --git a/Parser/pegen/pegen.c b/Parser/pegen/pegen.c
index ef48ade..895677b 100644
--- a/Parser/pegen/pegen.c
+++ b/Parser/pegen/pegen.c
@@ -1041,7 +1041,7 @@
     if (flags->cf_flags & PyCF_TYPE_COMMENTS) {
         parser_flags |= PyPARSE_TYPE_COMMENTS;
     }
-    if (flags->cf_feature_version < 7) {
+    if ((flags->cf_flags & PyCF_ONLY_AST) && flags->cf_feature_version < 7) {
         parser_flags |= PyPARSE_ASYNC_HACKS;
     }
     return parser_flags;
@@ -1214,7 +1214,8 @@
     mod_ty result = NULL;
 
     int parser_flags = compute_parser_flags(flags);
-    int feature_version = flags ? flags->cf_feature_version : PY_MINOR_VERSION;
+    int feature_version = flags && (flags->cf_flags & PyCF_ONLY_AST) ?
+        flags->cf_feature_version : PY_MINOR_VERSION;
     Parser *p = _PyPegen_Parser_New(tok, start_rule, parser_flags, feature_version,
                                     NULL, arena);
     if (p == NULL) {