From 721461298d1ec96678b876d74ea2186dde77b0be Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Mon, 10 Mar 2025 11:17:46 -0400
Subject: [PATCH] Avoid attr-err when `._ipc_msg==None`

Seems this can happen in particular when we raise a `MessageTypeError`
on the sender side of a `Context`, since there isn't any msg relayed
from the other side (though i'm wondering if MTE should derive from RAE
then considering this case?).

Means `RemoteActorError.boxed_type = None` in such cases instead of
raising an attr-error for the `None.boxed_type_str`.
---
 tractor/_exceptions.py | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/tractor/_exceptions.py b/tractor/_exceptions.py
index 249ea164..92a07375 100644
--- a/tractor/_exceptions.py
+++ b/tractor/_exceptions.py
@@ -432,9 +432,13 @@ class RemoteActorError(Exception):
         Error type boxed by last actor IPC hop.
 
         '''
-        if self._boxed_type is None:
+        if (
+            self._boxed_type is None
+            and
+            (ipc_msg := self._ipc_msg)
+        ):
             self._boxed_type = get_err_type(
-                self._ipc_msg.boxed_type_str
+                ipc_msg.boxed_type_str
             )
 
         return self._boxed_type
@@ -1144,6 +1148,12 @@ def unpack_error(
 
     '''
     if not isinstance(msg, Error):
+        # log.critical(
+        #     f'Why a non-Error !?\n'
+        #     f'{msg}\n'
+        # )
+        # dun work without gb-portal!
+        # breakpoint()
         return None
 
     # try to lookup a suitable error type from the local runtime