From 486f63f2d8673d191cb313b6bb8290796e646536 Mon Sep 17 00:00:00 2001
From: Eric Wasylishen <ewasylishen@gmail.com>
Date: Mon, 11 Sep 2023 18:47:56 -0600
Subject: [PATCH] bspfile.cc: fix infinite loop

---
 common/bspfile.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/common/bspfile.cc b/common/bspfile.cc
index 2616f0be..e16b27e8 100644
--- a/common/bspfile.cc
+++ b/common/bspfile.cc
@@ -1517,7 +1517,9 @@ public:
                         bool found_maps_folder = false;
                         fs::path olddir = gamedir = source;
 
-                        while (!gamedir.empty()) {
+                        // NOTE: parent_path() of C:/ is C:/ and this is considered non-empty
+                        // its relative_path() (the part after the drive letter) is empty, though
+                        while (!gamedir.relative_path().empty()) {
                             gamedir = fs::weakly_canonical(gamedir).parent_path();
 
                             if (string_iequals(gamedir.filename().generic_string(), MAPS_FOLDER)) {