From 672ecde68b30344170d0528a0784fb43763ec50f Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 7 Mar 2023 13:53:07 +0530
Subject: [PATCH] X11: Fix a crash if the X server requests clipboard data
 after we have relinquished the clipboard

Fixes #5650
---
 docs/changelog.rst | 2 ++
 glfw/x11_window.c  | 1 +
 2 files changed, 3 insertions(+)

diff --git a/docs/changelog.rst b/docs/changelog.rst
index 950070aab..b69d1a214 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -78,6 +78,8 @@ Detailed list of changes
 
 - Wayland KDE: Fix selecting in un-focused OS window not working correctly (:iss:`6095`)
 
+- X11: Fix a crash if the X server requests clipboard data after we have relinquished the clipboard (:iss:`5650`)
+
 
 0.27.1 [2023-02-07]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/glfw/x11_window.c b/glfw/x11_window.c
index 5fb567a19..137c69b2b 100644
--- a/glfw/x11_window.c
+++ b/glfw/x11_window.c
@@ -719,6 +719,7 @@ static bool createNativeWindow(_GLFWwindow* window,
 static size_t
 get_clipboard_data(const _GLFWClipboardData *cd, const char *mime, char **data) {
     *data = NULL;
+    if (cd->get_data == NULL) { return 0; }
     GLFWDataChunk chunk = cd->get_data(mime, NULL, cd->ctype);
     char *buf = NULL;
     size_t sz = 0, cap = 0;