From 1c7c2026dbd449f993fe41b7c7f8d8079e1e1545 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max.kellermann@gmail.com>
Date: Tue, 11 Mar 2025 09:23:32 +0100
Subject: [PATCH] config/Path: check for empty XDG variables

---
 src/config/Path.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/config/Path.cxx b/src/config/Path.cxx
index 1687480ab..f3b4d04a1 100644
--- a/src/config/Path.cxx
+++ b/src/config/Path.cxx
@@ -114,6 +114,9 @@ ParsePath(std::string_view path)
 
 		const auto [name, rest] = Split(path, '/');
 		const auto value = GetVariable(name);
+		if (value.IsNull())
+			throw FmtRuntimeError("No value for variable: {:?}", name);
+
 		return value / AllocatedPath::FromUTF8Throw(rest);
 	} else if (!PathTraitsUTF8::IsAbsolute(path)) {
 		throw FmtRuntimeError("not an absolute path: {:?}", path);