From a34a1cd125a25083abf02aa6055a634826aaf690 Mon Sep 17 00:00:00 2001
From: Alex Forencich <alex@alexforencich.com>
Date: Sun, 21 Mar 2021 21:03:35 -0700
Subject: [PATCH] Properly handle None

---
 cocotbext/eth/gmii.py  | 2 +-
 cocotbext/eth/xgmii.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/cocotbext/eth/gmii.py b/cocotbext/eth/gmii.py
index 503c58a..b97bc5d 100644
--- a/cocotbext/eth/gmii.py
+++ b/cocotbext/eth/gmii.py
@@ -100,7 +100,7 @@ class GmiiFrame:
             self.error = [0]*n
 
     def compact(self):
-        if not any(self.error):
+        if self.error is not None and not any(self.error):
             self.error = None
 
     def handle_tx_complete(self):
diff --git a/cocotbext/eth/xgmii.py b/cocotbext/eth/xgmii.py
index f0d8662..193d90b 100644
--- a/cocotbext/eth/xgmii.py
+++ b/cocotbext/eth/xgmii.py
@@ -102,7 +102,7 @@ class XgmiiFrame:
             self.ctrl = [0]*n
 
     def compact(self):
-        if not any(self.ctrl):
+        if self.ctrl is not None and not any(self.ctrl):
             self.ctrl = None
 
     def handle_tx_complete(self):