From ac9b31d6231e617541b54048d4063a3997be4b18 Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Thu, 26 Nov 2020 16:40:48 +0100
Subject: [PATCH] Abort early if the optimizer sequence is empty.

---
 libyul/optimiser/Suite.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libyul/optimiser/Suite.cpp b/libyul/optimiser/Suite.cpp
index f07a16c83..af9c93715 100644
--- a/libyul/optimiser/Suite.cpp
+++ b/libyul/optimiser/Suite.cpp
@@ -364,6 +364,9 @@ void OptimiserSuite::runSequenceUntilStable(
 	size_t maxRounds
 )
 {
+	if (_steps.empty())
+		return;
+
 	size_t codeSize = 0;
 	for (size_t rounds = 0; rounds < maxRounds; ++rounds)
 	{