catch some exceptions during GUI init

gui/qt/__init__.py

@@ -195,7 +195,8 @@ class ElectrumGui:
                 wallet = self.daemon.load_wallet(path, None)
             except BaseException as e:
                 traceback.print_exc(file=sys.stdout)
-                d = QMessageBox(QMessageBox.Warning, _('Error'), 'Cannot load wallet:\n' + str(e))
+                d = QMessageBox(QMessageBox.Warning, _('Error'),
+                                _('Cannot load wallet:') + '\n' + str(e))
                 d.exec_()
                 return
             if not wallet:
@@ -212,7 +213,14 @@ class ElectrumGui:
                     return
                 wallet.start_threads(self.daemon.network)
                 self.daemon.add_wallet(wallet)
-            w = self.create_window_for_wallet(wallet)
+            try:
+                w = self.create_window_for_wallet(wallet)
+            except BaseException as e:
+                traceback.print_exc(file=sys.stdout)
+                d = QMessageBox(QMessageBox.Warning, _('Error'),
+                                _('Cannot create window for wallet:') + '\n' + str(e))
+                d.exec_()
+                return
         if uri:
             w.pay_to_URI(uri)
         w.bring_to_top()

lib/daemon.py

@@ -25,6 +25,8 @@
 import ast
 import os
 import time
+import traceback
+import sys
 
 # from jsonrpc import JSONRPCResponseManager
 import jsonrpclib
@@ -300,4 +302,8 @@ class Daemon(DaemonThread):
             gui_name = 'qt'
         gui = __import__('electrum_gui.' + gui_name, fromlist=['electrum_gui'])
         self.gui = gui.ElectrumGui(config, self, plugins)
-        self.gui.main()
+        try:
+            self.gui.main()
+        except BaseException as e:
+            traceback.print_exc(file=sys.stdout)
+            # app will exit now