From 3ce8bd4d8f8a9b7fb7aea4de03e27ec727e2e48f Mon Sep 17 00:00:00 2001
From: SomberNight <somber.night@protonmail.com>
Date: Tue, 27 Feb 2018 16:40:11 +0100
Subject: [PATCH] fix #3983

---
 gui/qt/history_list.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gui/qt/history_list.py b/gui/qt/history_list.py
index c5364cf2a..9edbd61d4 100644
--- a/gui/qt/history_list.py
+++ b/gui/qt/history_list.py
@@ -136,6 +136,8 @@ class HistoryList(MyTreeWidget, AcceptFileDragDrop):
         vbox.addLayout(Buttons(OkButton(d), CancelButton(d)))
         d.setLayout(vbox)
         if d.exec_():
+            if d.date is None:
+                return None
             button.setText(d.date.toString())
             return time.mktime(d.date.toPyDate().timetuple())