From 243a6be085fe6a7ce49169864c68a8839735e49b Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Wed, 23 Oct 2019 17:52:30 +0000
Subject: Vendor import of stripped libc++ trunk r375505, the last commit
 before the upstream Subversion repository was made read-only, and the LLVM
 project migrated to GitHub:

https://llvm.org/svn/llvm-project/libcxx/trunk@375505
---
 include/istream | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'include/istream')

diff --git a/include/istream b/include/istream
index d6217bbb8009..bfbe5f24728e 100644
--- a/include/istream
+++ b/include/istream
@@ -1619,7 +1619,7 @@ operator>>(basic_istream<_CharT, _Traits>& __is, bitset<_Size>& __x)
                  __is.rdbuf()->sbumpc();
             }
             __x = bitset<_Size>(__str);
-            if (__c == 0)
+            if (_Size > 0 && __c == 0)
                __state |= ios_base::failbit;
 #ifndef _LIBCPP_NO_EXCEPTIONS
         }
-- 
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