From 3835430e017133035af6c4cad0576e88cf8fc383 Mon Sep 17 00:00:00 2001
From: jan <jan@orange.mpxd.net>
Date: Thu, 31 Mar 2022 00:00:58 -0700
Subject: [PATCH] warn if no vias are found

---
 snarl/main.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/snarl/main.py b/snarl/main.py
index f8e0b3b..1afcebd 100644
--- a/snarl/main.py
+++ b/snarl/main.py
@@ -140,6 +140,7 @@ def find_merge_pairs(
         if via_layer is not None:
             vias = via_polys[via_layer]
             if not vias:
+                logger.warning(f'No vias on layer {via_layer}')
                 continue
 
         for top_name in nets.keys():