From 2ab03a0914023d2150f38fa11c48ddedd90d0c94 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max.kellermann@gmail.com>
Date: Mon, 22 May 2023 14:42:02 +0200
Subject: [PATCH] util/ScopeExit: allow the function to throw

Fixes crash inside AtScopeExit() in the WASAPI output plugin.

Closes https://github.com/MusicPlayerDaemon/MPD/issues/1759
---
 src/util/ScopeExit.hxx | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/util/ScopeExit.hxx b/src/util/ScopeExit.hxx
index b64a35cf0..0fecf6c1e 100644
--- a/src/util/ScopeExit.hxx
+++ b/src/util/ScopeExit.hxx
@@ -47,7 +47,11 @@ public:
 		src.enabled = false;
 	}
 
-	~ScopeExitGuard() {
+	/* destructors are "noexcept" by default; this explicit
+	   "noexcept" declaration allows the destructor to throw if
+	   the function can throw; without this, a throwing function
+	   would std::terminate() */
+	~ScopeExitGuard() noexcept(noexcept(F::operator()())) {
 		if (enabled)
 			F::operator()();
 	}