From f31920e0929244b312f2a64af150a125ae00e34b Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Wed, 20 Oct 2021 09:25:12 +0200
Subject: [PATCH] event/Loop: add thread assert() to AddDefer()

Currently fails in class NfsFileReader due to
https://github.com/MusicPlayerDaemon/MPD/issues/1298
---
 src/event/Loop.cxx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/event/Loop.cxx b/src/event/Loop.cxx
index 630b7fb8b..31049a057 100644
--- a/src/event/Loop.cxx
+++ b/src/event/Loop.cxx
@@ -175,6 +175,10 @@ EventLoop::HandleTimers() noexcept
 void
 EventLoop::AddDefer(DeferEvent &d) noexcept
 {
+#ifdef HAVE_THREADED_EVENT_LOOP
+	assert(!IsAlive() || IsInside());
+#endif
+
 	defer.push_back(d);
 	again = true;
 }