trezor: raise and catch BaseException in signing

gui/qt/util.py

@@ -35,7 +35,7 @@ class WaitingDialog(QThread):
         self.error = None
         try:
             self.result = self.run_task()
-        except Exception as e:
+        except BaseException as e:
             traceback.print_exc(file=sys.stdout)
             self.error = str(e)
         self.d.emit(SIGNAL('done'))

plugins/btchipwallet.py

@@ -322,8 +322,10 @@ class BTChipWallet(NewWallet):
         return b64encode(chr(27 + 4 + (signature[0] & 0x01)) + r + s) 
 
     def sign_transaction(self, tx, keypairs, password):
-        if tx.error or tx.is_complete():
+        if tx.is_complete():
             return
+        if tx.error:
+            raise BaseException(tx.error)
         self.signing = True        
         inputs = []
         inputsPaths = []

plugins/trezor.py

@@ -274,8 +274,10 @@ class TrezorWallet(NewWallet):
         return str(b64_msg_sig)
 
     def sign_transaction(self, tx, keypairs, password):
-        if tx.error or tx.is_complete():
+        if tx.is_complete():
             return
+        if tx.error:
+            raise BaseException(tx.error)
 
         if not self.check_proper_device():
             give_error('Wrong device or password')