From c702e15a3fc9299499d7e362b180bc3ba778bbb4 Mon Sep 17 00:00:00 2001
From: airskywater <96818686+airskywater@users.noreply.github.com>
Date: Sat, 24 Sep 2022 12:03:44 +0800
Subject: Add more sanity check for pointers

---
 common/kernel/timing.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/kernel/timing.cc b/common/kernel/timing.cc
index 66de8dfc..a9f64afa 100644
--- a/common/kernel/timing.cc
+++ b/common/kernel/timing.cc
@@ -299,6 +299,7 @@ void TimingAnalyser::identify_related_domains()
     std::function<void(const NetInfo *, dict<IdString, delay_t> &, delay_t)> find_net_drivers =
             [&](const NetInfo *ni, dict<IdString, delay_t> &drivers, delay_t delay_acc) {
                 // Get driving cell and port
+                if (nullptr == ni) return;
                 const CellInfo *cell = ni->driver.cell;
                 if (nullptr == cell) return;
         
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