From 7e854fcdf69c606ac4a248f5936d8f8fdaa7bd6f Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Thu, 15 Jul 2021 16:06:54 +0200
Subject: [PATCH] Do not add utility file for "viaIR".

---
 libsolidity/interface/CompilerStack.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/libsolidity/interface/CompilerStack.cpp b/libsolidity/interface/CompilerStack.cpp
index ff6923a62..a85f320b1 100644
--- a/libsolidity/interface/CompilerStack.cpp
+++ b/libsolidity/interface/CompilerStack.cpp
@@ -922,8 +922,11 @@ map<string, unsigned> CompilerStack::sourceIndices() const
 	unsigned index = 0;
 	for (auto const& s: m_sources)
 		indices[s.first] = index++;
-	solAssert(!indices.count(CompilerContext::yulUtilityFileName()), "");
-	indices[CompilerContext::yulUtilityFileName()] = index++;
+	if (!m_viaIR)
+	{
+		solAssert(!indices.count(CompilerContext::yulUtilityFileName()), "");
+		indices[CompilerContext::yulUtilityFileName()] = index++;
+	}
 	return indices;
 }