From 6c7335e002c3b8018606cd857460c646da162b3d Mon Sep 17 00:00:00 2001
From: Kittywhiskers Van Gogh <63189531+kwvg@users.noreply.github.com>
Date: Sun, 13 Feb 2022 17:30:21 +0200
Subject: [PATCH] merge bitcoin#24331: Revert back `MoveFileExW` call for
 MinGW-w64

---
 src/test/fs_tests.cpp | 34 ++++++++++++++++++++++++++++++++++
 src/util/system.cpp   | 11 +++++++++++
 2 files changed, 45 insertions(+)

diff --git a/src/test/fs_tests.cpp b/src/test/fs_tests.cpp
index b06d2b747e..4a8803a205 100644
--- a/src/test/fs_tests.cpp
+++ b/src/test/fs_tests.cpp
@@ -118,6 +118,40 @@ BOOST_AUTO_TEST_CASE(fsbridge_fstream)
     }
 }
 
+BOOST_AUTO_TEST_CASE(rename)
+{
+    const fs::path tmpfolder{m_args.GetDataDirBase()};
+
+    const fs::path path1{GetUniquePath(tmpfolder)};
+    const fs::path path2{GetUniquePath(tmpfolder)};
+
+    const std::string path1_contents{"1111"};
+    const std::string path2_contents{"2222"};
+
+    {
+        std::ofstream file{path1};
+        file << path1_contents;
+    }
+
+    {
+        std::ofstream file{path2};
+        file << path2_contents;
+    }
+
+    // Rename path1 -> path2.
+    BOOST_CHECK(RenameOver(path1, path2));
+
+    BOOST_CHECK(!fs::exists(path1));
+
+    {
+        std::ifstream file{path2};
+        std::string contents;
+        file >> contents;
+        BOOST_CHECK_EQUAL(contents, path1_contents);
+    }
+    fs::remove(path2);
+}
+
 #ifndef WIN32
 BOOST_AUTO_TEST_CASE(create_directories)
 {
diff --git a/src/util/system.cpp b/src/util/system.cpp
index bbaa2f9ecb..a65ed64966 100644
--- a/src/util/system.cpp
+++ b/src/util/system.cpp
@@ -1138,9 +1138,20 @@ std::vector<util::SettingsValue> ArgsManager::GetSettingsList(const std::string&
 
 bool RenameOver(fs::path src, fs::path dest)
 {
+#ifdef __MINGW64__
+    // This is a workaround for a bug in libstdc++ which
+    // implements std::filesystem::rename with _wrename function.
+    // This bug has been fixed in upstream:
+    //  - GCC 10.3: 8dd1c1085587c9f8a21bb5e588dfe1e8cdbba79e
+    //  - GCC 11.1: 1dfd95f0a0ca1d9e6cbc00e6cbfd1fa20a98f312
+    // For more details see the commits mentioned above.
+    return MoveFileExW(src.wstring().c_str(), dest.wstring().c_str(),
+                       MOVEFILE_REPLACE_EXISTING) != 0;
+#else
     std::error_code error;
     fs::rename(src, dest, error);
     return !error;
+#endif
 }
 
 /**