trezor/keepkey: catch exception during device init

plugins/keepkey/plugin.py

@@ -1,4 +1,6 @@
 from binascii import hexlify, unhexlify
+import traceback
+import sys
 
 from electrum.util import bfh, bh2u
 from electrum.bitcoin import (b58_address_to_hash160, xpub_from_pubkey,
@@ -161,12 +163,21 @@ class KeepKeyCompatiblePlugin(HW_PluginBase):
         def f(method):
             import threading
             settings = self.request_trezor_init_settings(wizard, method, self.device)
-            t = threading.Thread(target = self._initialize_device, args=(settings, method, device_id, wizard, handler))
+            t = threading.Thread(target=self._initialize_device_safe, args=(settings, method, device_id, wizard, handler))
             t.setDaemon(True)
             t.start()
             wizard.loop.exec_()
         wizard.choice_dialog(title=_('Initialize Device'), message=msg, choices=choices, run_next=f)
 
+    def _initialize_device_safe(self, settings, method, device_id, wizard, handler):
+        try:
+            self._initialize_device(settings, method, device_id, wizard, handler)
+        except BaseException as e:
+            traceback.print_exc(file=sys.stderr)
+            handler.show_error(str(e))
+        finally:
+            wizard.loop.exit(0)
+
     def _initialize_device(self, settings, method, device_id, wizard, handler):
         item, label, pin_protection, passphrase_protection = settings
 
@@ -192,7 +203,6 @@ class KeepKeyCompatiblePlugin(HW_PluginBase):
             pin = pin_protection  # It's the pin, not a boolean
             client.load_device_by_xprv(item, pin, passphrase_protection,
                                        label, language)
-        wizard.loop.exit(0)
 
     def setup_device(self, device_info, wizard, purpose):
         devmgr = self.device_manager()

plugins/trezor/trezor.py

@@ -1,4 +1,6 @@
 from binascii import hexlify, unhexlify
+import traceback
+import sys
 
 from electrum.util import bfh, bh2u, versiontuple
 from electrum.bitcoin import (b58_address_to_hash160, xpub_from_pubkey,
@@ -196,12 +198,21 @@ class TrezorPlugin(HW_PluginBase):
         def f(method):
             import threading
             settings = self.request_trezor_init_settings(wizard, method, self.device)
-            t = threading.Thread(target = self._initialize_device, args=(settings, method, device_id, wizard, handler))
+            t = threading.Thread(target=self._initialize_device_safe, args=(settings, method, device_id, wizard, handler))
             t.setDaemon(True)
             t.start()
             wizard.loop.exec_()
         wizard.choice_dialog(title=_('Initialize Device'), message=msg, choices=choices, run_next=f)
 
+    def _initialize_device_safe(self, settings, method, device_id, wizard, handler):
+        try:
+            self._initialize_device(settings, method, device_id, wizard, handler)
+        except BaseException as e:
+            traceback.print_exc(file=sys.stderr)
+            handler.show_error(str(e))
+        finally:
+            wizard.loop.exit(0)
+
     def _initialize_device(self, settings, method, device_id, wizard, handler):
         item, label, pin_protection, passphrase_protection = settings
 
@@ -240,7 +251,6 @@ class TrezorPlugin(HW_PluginBase):
             pin = pin_protection  # It's the pin, not a boolean
             client.load_device_by_xprv(item, pin, passphrase_protection,
                                        label, language)
-        wizard.loop.exit(0)
 
     def setup_device(self, device_info, wizard, purpose):
         devmgr = self.device_manager()