From b77d2a8c85339d296b91d6916742ab25300c5542 Mon Sep 17 00:00:00 2001
From: Junliang HU <jlhu@cse.cuhk.edu.hk>
Date: Mon, 29 Mar 2021 21:01:07 +0800
Subject: [PATCH] Fix moving ostream while holding data

---
 include/fmt/os.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/fmt/os.h b/include/fmt/os.h
index 0b0b94ed..78971e37 100644
--- a/include/fmt/os.h
+++ b/include/fmt/os.h
@@ -396,8 +396,10 @@ class ostream final : private detail::buffer<char> {
   ostream(ostream&& other)
       : detail::buffer<char>(other.data(), other.size(), other.capacity()),
         file_(std::move(other.file_)) {
+    other.clear();
     other.set(nullptr, 0);
   }
+
   ~ostream() {
     flush();
     delete[] data();