From 159043803c1c174320ce88c2f8ed68e21dbf0a56 Mon Sep 17 00:00:00 2001
From: bicarus <202771338+bicarus-dev@users.noreply.github.com>
Date: Sun, 26 Jul 2026 04:30:06 -0700
Subject: [PATCH] imgui: fix crash when launching from UNC path (network
 shares) (#836)

## Link to GitHub Issue or related Pull Request, if one exists
n/a

## Description of change
ImGui filebrowser extension crashes due to MinGW quirk about UNC path
handling.

## Testing
---
 src/spice2x/external/imgui/imgui_filebrowser.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/spice2x/external/imgui/imgui_filebrowser.h b/src/spice2x/external/imgui/imgui_filebrowser.h
index 2f52538..94fcb1f 100644
--- a/src/spice2x/external/imgui/imgui_filebrowser.h
+++ b/src/spice2x/external/imgui/imgui_filebrowser.h
@@ -878,7 +878,15 @@ inline void ImGui::FileBrowser::UpdateFileRecords()
 
 inline void ImGui::FileBrowser::SetPwdUncatched(const std::filesystem::path &pwd)
 {
-    pwd_ = absolute(pwd);
+    // spice2x
+    // avoid MinGW std::filesystem::absolute() duplicating UNC server/share
+    // prefixes, which makes directory_iterator() throw during startup
+    // spice2x
+    const auto &nativePwd = pwd.native();
+    const bool hasUncPrefix = nativePwd.size() >= 2 &&
+        (nativePwd[0] == '\\' || nativePwd[0] == '/') &&
+        (nativePwd[1] == '\\' || nativePwd[1] == '/');
+    pwd_ = hasUncPrefix ? pwd : absolute(pwd);
     UpdateFileRecords();
     selectedFilenames_.clear();
     (*inputNameBuf_)[0] = '\0';