From: Clifford Wolf <clifford@clifford.at>
Date: Tue, 30 Apr 2019 20:20:45 +0000 (+0200)
Subject: Fix segfault in wreduce
X-Git-Tag: yosys-0.9~142^2~6
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=32ff37bb5a8cec79e8cbcfac4075cc553fa9a394;p=yosys.git

Fix segfault in wreduce

Signed-off-by: Clifford Wolf <clifford@clifford.at>
---

diff --git a/passes/opt/wreduce.cc b/passes/opt/wreduce.cc
index 68e077cf9..41de8aad1 100644
--- a/passes/opt/wreduce.cc
+++ b/passes/opt/wreduce.cc
@@ -180,6 +180,8 @@ struct WreduceWorker
 			}
 
 			auto info = mi.query(sig_q[i]);
+			if (info == nullptr)
+				return;
 			if (!info->is_output && GetSize(info->ports) == 1 && !keep_bits.count(mi.sigmap(sig_q[i]))) {
 				remove_init_bits.insert(sig_q[i]);
 				sig_d.remove(i);