From 1f7893bd8c8d88f2a84b9bcba67acf43cee0430f Mon Sep 17 00:00:00 2001
From: Eddie Hung <eddie@fpgeh.com>
Date: Fri, 10 Jan 2020 10:46:06 -0800
Subject: [PATCH] abc9: fix memory leak

---
 passes/techmap/abc9.cc | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/passes/techmap/abc9.cc b/passes/techmap/abc9.cc
index 8cb34e523..3fc6ed2c2 100644
--- a/passes/techmap/abc9.cc
+++ b/passes/techmap/abc9.cc
@@ -416,13 +416,11 @@ void abc9_module(RTLIL::Design *design, RTLIL::Module *module, std::string scrip
 
 		dict<IdString, bool> abc9_box;
 		vector<RTLIL::Cell*> boxes;
-		for (auto it = module->cells_.begin(); it != module->cells_.end(); ) {
-			auto cell = it->second;
+		for (auto cell : module->cells().to_vector()) {
 			if (cell->type.in(ID($_AND_), ID($_NOT_), ID($__ABC9_FF_))) {
-				it = module->cells_.erase(it);
+				module->remove(cell);
 				continue;
 			}
-			++it;
 			RTLIL::Module* box_module = design->module(cell->type);
 			auto jt = abc9_box.find(cell->type);
 			if (jt == abc9_box.end())