From 83f59945a6b5289ec1f8cb5d7f6046d43efe6ebd Mon Sep 17 00:00:00 2001
From: Raphael Robatsch <raphael-git@tapesoftware.net>
Date: Sat, 3 Dec 2022 18:30:32 +0100
Subject: [PATCH] fix crash when an output goes away

happens e.g. when a monitor is powered off.
The wl_output interface published by dwl has version 1, but the
wl_output_release request is only supported since version 3.
---
 src/common.hpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/common.hpp b/src/common.hpp
index aed4480..c905358 100644
--- a/src/common.hpp
+++ b/src/common.hpp
@@ -54,8 +54,14 @@ struct WlDeleter;
 template<typename T>
 using wl_unique_ptr = std::unique_ptr<T, WlDeleter<T>>;
 
+inline void wl_output_release_checked(wl_output* output) {
+	if (wl_output_get_version(output) >= WL_OUTPUT_RELEASE_SINCE_VERSION) {
+		wl_output_release(output);
+	}
+}
+
 WL_DELETER(wl_buffer, wl_buffer_destroy);
-WL_DELETER(wl_output, wl_output_release);
+WL_DELETER(wl_output, wl_output_release_checked);
 WL_DELETER(wl_pointer, wl_pointer_release);
 WL_DELETER(wl_seat, wl_seat_release);
 WL_DELETER(wl_surface, wl_surface_destroy);