From 00fdd08bc1160510d8ed3d7a2d82bdd88e148a47 Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Wed, 27 Feb 2019 17:04:28 -0800
Subject: Check flags isn't NULL before dereferencing (this broke
 regen-importlib)

---
 Python/pythonrun.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Python/pythonrun.c')

diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index b763c99da0..199ea82434 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -1200,7 +1200,7 @@ PyParser_ASTFromStringObject(const char *s, PyObject *filename, int start,
     PyCompilerFlags localflags;
     perrdetail err;
     int iflags = PARSER_FLAGS(flags);
-    if (flags->cf_feature_version < 7)
+    if (flags && flags->cf_feature_version < 7)
         iflags |= PyPARSE_ASYNC_HACKS;
 
     node *n = PyParser_ParseStringObject(s, filename,
-- 
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