From 082405259b7b6698f775783e24bcaf40acd99ccc Mon Sep 17 00:00:00 2001
From: roytam1 <roytam@gmail.com>
Date: Wed, 15 Jun 2022 10:10:10 +0800
Subject: [PATCH] editor: check selection->GetAnchorFocusRange() before using
 its functions

this fixes crash when clicking Quote Message twice.
---
 editor/libeditor/EditorBase.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/editor/libeditor/EditorBase.cpp b/editor/libeditor/EditorBase.cpp
index 60df3571ef..ef5845ffe0 100644
--- a/editor/libeditor/EditorBase.cpp
+++ b/editor/libeditor/EditorBase.cpp
@@ -4201,7 +4201,7 @@ EditorBase::DeleteSelectionAndPrepareToCreateNode()
   NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
   MOZ_ASSERT(selection->GetAnchorFocusRange());
 
-  if (!selection->GetAnchorFocusRange()->Collapsed()) {
+  if (selection->GetAnchorFocusRange() && !selection->GetAnchorFocusRange()->Collapsed()) {
     nsresult rv = DeleteSelection(nsIEditor::eNone, nsIEditor::eStrip);
     NS_ENSURE_SUCCESS(rv, rv);