From 3eed6bb8ff0fc2c6761064c63f9aadc23c8db4aa Mon Sep 17 00:00:00 2001
From: mrg <mrg@ucsc.edu>
Date: Wed, 14 Apr 2021 11:07:38 -0700
Subject: [PATCH] Check for None before checking DRC tool

---
 compiler/base/lef.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/base/lef.py b/compiler/base/lef.py
index 8ca4918b..a5c1910a 100644
--- a/compiler/base/lef.py
+++ b/compiler/base/lef.py
@@ -68,7 +68,7 @@ class lef:
     def lef_write(self, lef_name):
         """ Write the entire lef of the object to the file. """
 
-        if OPTS.drc_exe[0] == "magic":
+        if OPTS.drc_exe and OPTS.drc_exe[0] == "magic":
             self.magic_lef_write(lef_name)
             return