From 8471d4249c73830a142e066ec83dccf8211a123a Mon Sep 17 00:00:00 2001
From: David Shah <dave@ds0.me>
Date: Wed, 21 Nov 2018 17:23:20 +0000
Subject: [PATCH] router1: Fix unrouted, undriven nets

Signed-off-by: David Shah <dave@ds0.me>
---
 common/router1.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/common/router1.cc b/common/router1.cc
index a3388fa8..aa4332aa 100644
--- a/common/router1.cc
+++ b/common/router1.cc
@@ -870,7 +870,12 @@ bool Context::checkRoutedDesign() const
         }
 
         auto src_wire = ctx->getNetinfoSourceWire(net_info);
-        log_assert(src_wire != WireId());
+        if (src_wire == WireId()) {
+            log_assert(net_info->driver.cell == nullptr);
+            if (ctx->debug)
+                log("  undriven and unrouted\n");
+            continue;
+        }
 
         if (net_info->wires.count(src_wire) == 0) {
             if (ctx->debug)