From 2a8cff626b9be044a165475b70eef379f5bc7535 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kamil=20=C5=9Aliwak?= <kamil.sliwak@codepoets.it>
Date: Thu, 19 Nov 2020 19:57:35 +0100
Subject: [PATCH] CommandLineInterface::link(): Print invalid link references
 to stderr

---
 solc/CommandLineInterface.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/solc/CommandLineInterface.cpp b/solc/CommandLineInterface.cpp
index 7d3f7d763..b74cc224f 100644
--- a/solc/CommandLineInterface.cpp
+++ b/solc/CommandLineInterface.cpp
@@ -55,6 +55,7 @@
 #include <libsolutil/CommonIO.h>
 #include <libsolutil/JSON.h>
 
+#include <algorithm>
 #include <memory>
 
 #include <boost/filesystem.hpp>
@@ -1788,6 +1789,7 @@ bool CommandLineInterface::link()
 			)
 			{
 				serr() << "Error in binary object file " << src.first << " at position " << (it - src.second.begin()) << endl;
+				serr() << '"' << string(it, it + min(placeholderSize, static_cast<int>(end - it))) << "\" is not a valid link reference." << endl;
 				return false;
 			}