From 98cdbe37714b23b2826b18276a789cf98ca98510 Mon Sep 17 00:00:00 2001
From: SomberNight <somber.night@protonmail.com>
Date: Mon, 26 Feb 2018 22:03:22 +0100
Subject: [PATCH] fix #3956

---
 gui/qt/util.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gui/qt/util.py b/gui/qt/util.py
index 369c05e8..1a4c5f26 100644
--- a/gui/qt/util.py
+++ b/gui/qt/util.py
@@ -218,13 +218,14 @@ class WindowModalDialog(QDialog, MessageBoxMixin):
 
 
 class WaitingDialog(WindowModalDialog):
-    '''Shows a please wait dialog whilst runnning a task.  It is not
+    '''Shows a please wait dialog whilst running a task.  It is not
     necessary to maintain a reference to this dialog.'''
     def __init__(self, parent, message, task, on_success=None, on_error=None):
         assert parent
         if isinstance(parent, MessageBoxMixin):
             parent = parent.top_level_window()
         WindowModalDialog.__init__(self, parent, _("Please wait"))
+        self.setAttribute(Qt.WA_DeleteOnClose)  # see #3956
         vbox = QVBoxLayout(self)
         vbox.addWidget(QLabel(message))
         self.accepted.connect(self.on_accepted)