From 9c13ae4fe74bb0d548f24bea1ec49a3c085f06ea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5rten=20Nordheim?= <marten.nordheim@qt.io>
Date: Fri, 10 Dec 2021 16:04:13 +0100
Subject: [PATCH] QMultiHash::emplace: work around MSVC2019 recursion bug

It was already worked around in QHash, but QMultiHash got overlooked.

Fixes: QTBUG-98943
Change-Id: I115bf2090500257b5141a386818ae1553702a8c8
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 src/corelib/tools/qhash.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/corelib/tools/qhash.h b/src/corelib/tools/qhash.h
index d9b7df18014..9d6229207d7 100644
--- a/src/corelib/tools/qhash.h
+++ b/src/corelib/tools/qhash.h
@@ -1754,7 +1754,8 @@ public:
     template <typename ...Args>
     iterator emplace(const Key &key, Args &&... args)
     {
-        return emplace(Key(key), std::forward<Args>(args)...);
+        Key copy = key; // Needs to be explicit for MSVC 2019
+        return emplace(std::move(copy), std::forward<Args>(args)...);
     }
 
     template <typename ...Args>