From 21d5f3f4a1da9d3d7fcaadf1e84df6772c9b6a5d Mon Sep 17 00:00:00 2001
From: Paul Cornett <paulcor@users.noreply.github.com>
Date: Fri, 23 Oct 2020 09:20:08 -0700
Subject: [PATCH] Avoid crash if wxMessageBox() is called before GTK is
 initialized

See https://github.com/wxWidgets/wxWidgets/pull/2099
---
 src/gtk/msgdlg.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/gtk/msgdlg.cpp b/src/gtk/msgdlg.cpp
index 3cc63658b9..5530d8bb5c 100644
--- a/src/gtk/msgdlg.cpp
+++ b/src/gtk/msgdlg.cpp
@@ -109,6 +109,10 @@ void wxMessageDialog::DoSetCustomLabel(wxString& var, const ButtonLabel& label)
 
 void wxMessageDialog::GTKCreateMsgDialog()
 {
+    // Avoid crash if wxMessageBox() is called before GTK is initialized
+    if (g_type_class_peek(GDK_TYPE_DISPLAY) == NULL)
+        return;
+
     GtkWindow * const parent = m_parent ? GTK_WINDOW(m_parent->m_widget) : NULL;
 
     GtkMessageType type = GTK_MESSAGE_ERROR;