From 446ccf1f05b2b36db9161bf4ab050778a1cbaee6 Mon Sep 17 00:00:00 2001
From: Clifford Wolf <clifford@clifford.at>
Date: Sun, 7 Jan 2018 16:35:22 +0100
Subject: [PATCH] Bugfix in hierarchy blackbox module port width handling

---
 passes/hierarchy/hierarchy.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/passes/hierarchy/hierarchy.cc b/passes/hierarchy/hierarchy.cc
index c680dbbd8..898763c64 100644
--- a/passes/hierarchy/hierarchy.cc
+++ b/passes/hierarchy/hierarchy.cc
@@ -621,8 +621,9 @@ struct HierarchyPass : public Pass {
 		}
 
 		std::set<Module*> blackbox_derivatives;
+		std::vector<Module*> design_modules = design->modules();
 
-		for (auto module : design->modules())
+		for (auto module : design_modules)
 		for (auto cell : module->cells())
 		{
 			Module *m = design->module(cell->type);
-- 
2.30.2