From 741155468610196bc9fa03cab92902d012b32654 Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Thu, 6 May 2021 09:33:41 +0100
Subject: [PATCH] Revert "libstdc++: Use unsigned char argument to
 std::isdigit"

This reverts commit d0d6ca019717305df0ef41e3fe1da48f7f561fac.
---
 libstdc++-v3/include/std/charconv | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/include/std/charconv b/libstdc++-v3/include/std/charconv
index 571be075a6b3..193702e677a6 100644
--- a/libstdc++-v3/include/std/charconv
+++ b/libstdc++-v3/include/std/charconv
@@ -565,7 +565,7 @@ namespace __detail
       while (__first != __last)
 	{
 	  unsigned char __c = *__first;
-	  if (std::isdigit(static_cast<unsigned char>(__c)))
+	  if (std::isdigit(__c))
 	    __c -= '0';
 	  else
 	    {
-- 
2.47.2