From 58290c0c77e09aa40a098065ea999c85aaba398c Mon Sep 17 00:00:00 2001
From: Claire Xenia Wolf <claire@clairexen.net>
Date: Mon, 26 Apr 2021 16:31:44 +0200
Subject: [PATCH] Remove duplicates from conns array in JSON front-end, fixes
 #2736

---
 frontends/json/jsonparse.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/frontends/json/jsonparse.cc b/frontends/json/jsonparse.cc
index d897ac20b..cbfa038a1 100644
--- a/frontends/json/jsonparse.cc
+++ b/frontends/json/jsonparse.cc
@@ -585,6 +585,10 @@ void json_import(Design *design, string &modname, JsonNode *node)
 			module->memories[mem->name] = mem;
 		}
 	}
+
+	// remove duplicates from connections array
+	pool<RTLIL::SigSig> unique_connections(module->connections_.begin(), module->connections_.end());
+	module->connections_ = std::vector<RTLIL::SigSig>(unique_connections.begin(), unique_connections.end());
 }
 
 struct JsonFrontend : public Frontend {
-- 
2.30.2