From eaa8efb950be5d8f1803a99b06f76cf398c67cb8 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <viz@fb.com>
Date: Thu, 16 Jun 2022 14:56:45 -0700
Subject: [PATCH] Fix ofstream handling in msvc

---
 include/fmt/ostream.h | 4 +++-
 test/ostream-test.cc  | 7 +++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/include/fmt/ostream.h b/include/fmt/ostream.h
index 9b870820..f58453dd 100644
--- a/include/fmt/ostream.h
+++ b/include/fmt/ostream.h
@@ -82,7 +82,9 @@ template class filebuf_access<filebuf_access_tag,
                               &filebuf_type::_Myfile>;
 
 inline bool write(std::filebuf& buf, fmt::string_view data) {
-  print(get_file(buf), data);
+  FILE* f = get_file(buf);
+  if (!f) return false;
+  print(f, data);
   return true;
 }
 inline bool write(std::wfilebuf&, fmt::basic_string_view<wchar_t>) {
diff --git a/test/ostream-test.cc b/test/ostream-test.cc
index b6d0085d..6a95b9ce 100644
--- a/test/ostream-test.cc
+++ b/test/ostream-test.cc
@@ -5,6 +5,8 @@
 //
 // For the license information refer to format.h.
 
+#include <fstream>
+
 #include "fmt/format.h"
 
 using fmt::runtime;
@@ -297,3 +299,8 @@ TEST(ostream_test, is_formattable) {
   EXPECT_TRUE(fmt::is_formattable<std::string>());
   EXPECT_TRUE(fmt::is_formattable<fmt::detail::std_string_view<char>>());
 }
+
+TEST(ostream_test, closed_ofstream) {
+  std::ofstream ofs;
+  fmt::print(ofs, "discard");
+}