From e5f062c9acf8151f0b8a0c8d7e10f0a4b79c6276 Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@redhat.com>
Date: Wed, 25 Apr 2018 14:45:09 +0200
Subject: [PATCH] bpo-30465: Fix C downcast warning on Windows in ast.c

ast.c: fstring_fix_node_location() downcasts a pointer difference to
a C int. Replace int with Py_ssize_t to fix the compiler warning.
---
 Python/ast.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Python/ast.c b/Python/ast.c
index e2092f0f85433e..0d692ffd95bd1d 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -4313,7 +4313,7 @@ fstring_fix_node_location(const node *parent, node *n, char *expr_str)
                     break;
                 start--;
             }
-            cols += substr - start;
+            cols += (int)(substr - start);
             /* Fix lineno in mulitline strings. */
             while ((substr = strchr(substr + 1, '\n')))
                 lines--;