1 files changed, 4 insertions, 5 deletions
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index 41f2174..6e24131 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -1495,11 +1495,10 @@ Py_CompileStringObject(const char *str, PyObject *filename, int start,
         return NULL;
     }
     if (flags && (flags->cf_flags & PyCF_ONLY_AST)) {
-        if ((flags->cf_flags & PyCF_OPTIMIZED_AST) == PyCF_OPTIMIZED_AST) {
-            if (_PyCompile_AstOptimize(mod, filename, flags, optimize, arena) < 0) {
-                _PyArena_Free(arena);
-                return NULL;
-            }
+        int syntax_check_only = ((flags->cf_flags & PyCF_OPTIMIZED_AST) == PyCF_ONLY_AST); /* unoptiomized AST */
+        if (_PyCompile_AstOptimize(mod, filename, flags, optimize, arena, syntax_check_only) < 0) {
+            _PyArena_Free(arena);
+            return NULL;
         }
         PyObject *result = PyAST_mod2obj(mod);
         _PyArena_Free(arena);