fix issue #1853

gui/qt/main_window.py

@@ -1627,24 +1627,17 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
             return
 
         try:
-            self.wallet.check_password(password)
+            self.wallet.update_password(password, new_password)
         except BaseException as e:
             self.show_error(str(e))
             return
-
-        try:
-            self.wallet.update_password(password, new_password)
         except:
             traceback.print_exc(file=sys.stdout)
             self.show_error(_('Failed to update password'))
             return
 
-        if new_password:
-            msg = _('Password was updated successfully')
-        else:
-            msg = _('This wallet is not encrypted')
+        msg = _('Password was updated successfully') if new_password else _('This wallet is not encrypted')
         self.show_message(msg, title=_("Success"))
-
         self.update_lock_icon()
 
     def toggle_search(self):

lib/commands.py

@@ -94,6 +94,8 @@ class Commands:
         cmd = known_commands[method]
         if cmd.requires_password and self.wallet.use_encryption:
             self._password = apply(password_getter,())
+            if self._password is None:
+                return
         f = getattr(self, method)
         result = f(*args)
         self._password = None

lib/wallet.py

@@ -1107,6 +1107,8 @@ class Abstract_Wallet(PrintError):
             tx.sign(keypairs)
 
     def update_password(self, old_password, new_password):
+        self.check_password(old_password)
+
         if new_password == '':
             new_password = None