From bde48fd8110cc5f128d5db44810d17811e328a24 Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Tue, 4 Aug 2020 02:38:16 +0200
Subject: [PATCH] bpo-38156: Fix compiler warning in PyOS_StdioReadline()
 (GH-21721)

incr cannot be larger than INT_MAX: downcast to int explicitly.
---
 Parser/myreadline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Parser/myreadline.c b/Parser/myreadline.c
index a49c9d892dd..143b41f1eab 100644
--- a/Parser/myreadline.c
+++ b/Parser/myreadline.c
@@ -317,7 +317,7 @@ PyOS_StdioReadline(FILE *sys_stdin, FILE *sys_stdout, const char *prompt)
             return NULL;
         }
         p = pr;
-        int err = my_fgets(tstate, p + n, incr, sys_stdin);
+        int err = my_fgets(tstate, p + n, (int)incr, sys_stdin);
         if (err == 1) {
             // Interrupt
             PyMem_RawFree(p);