From b3caf846fc0b87b644367affbde2861a9404c6d9 Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Thu, 10 Jun 2021 13:58:06 -0400
Subject: [PATCH] Only close recv chan if we get a ref

---
 tractor/_portal.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tractor/_portal.py b/tractor/_portal.py
index 0ce1a53..7f29e0e 100644
--- a/tractor/_portal.py
+++ b/tractor/_portal.py
@@ -359,6 +359,7 @@ class Portal:
         fn_mod_path, fn_name = func_deats(func)
 
 
+        recv_chan: trio.ReceiveMemoryChannel = None
         try:
             cid, recv_chan, functype, first_msg = await self._submit(
                 fn_mod_path, fn_name, kwargs)
@@ -390,7 +391,8 @@ class Portal:
                 await ctx.cancel()
 
         finally:
-            await recv_chan.aclose()
+            if recv_chan is not None:
+                await recv_chan.aclose()
 
 @dataclass
 class LocalPortal: