From d3c0ec5651aa224908618efb555f897b995b477c Mon Sep 17 00:00:00 2001
From: Elad <18193363+elad335@users.noreply.github.com>
Date: Sat, 2 Nov 2024 13:34:51 +0200
Subject: [PATCH] Print last system error on fs::error::unknown

---
 Utilities/File.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Utilities/File.cpp b/Utilities/File.cpp
index 89d53f9407..7426529e26 100644
--- a/Utilities/File.cpp
+++ b/Utilities/File.cpp
@@ -2639,6 +2639,17 @@ void fmt_class_string<fs::seek_mode>::format(std::string& out, u64 arg)
 template<>
 void fmt_class_string<fs::error>::format(std::string& out, u64 arg)
 {
+	if (arg == static_cast<u64>(fs::error::unknown))
+	{
+		// Note: may not be the correct error code because it only prints the last
+#ifdef _WIN32
+		fmt::append(out, "Unknown error [errno=%d]", GetLastError());
+#else
+		fmt::append(out, "Unknown error [errno=%d]", errno);
+#endif
+		return;
+	}
+
 	format_enum(out, arg, [](auto arg)
 	{
 		switch (arg)