From: Bob Halley <halley@dnspython.org>
Date: Thu, 13 Aug 2020 15:08:19 +0000 (-0700)
Subject: Do not try to set a future that is already set. [#572]
X-Git-Tag: v2.1.0rc1~82
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=665b61e1ff85f8904a0bb6d8780ff23759cadfb0;p=thirdparty%2Fdnspython.git

Do not try to set a future that is already set. [#572]
---

diff --git a/dns/_asyncio_backend.py b/dns/_asyncio_backend.py
index 1cf15192..6a563326 100644
--- a/dns/_asyncio_backend.py
+++ b/dns/_asyncio_backend.py
@@ -30,11 +30,11 @@ class _DatagramProtocol:
             self.recvfrom = None
 
     def error_received(self, exc):  # pragma: no cover
-        if self.recvfrom:
+        if self.recvfrom and not self.recvfrom.done():
             self.recvfrom.set_exception(exc)
 
     def connection_lost(self, exc):
-        if self.recvfrom:
+        if self.recvfrom and not self.recvfrom.done():
             self.recvfrom.set_exception(exc)
 
     def close(self):