Index: src/Common/utility.h
===================================================================
--- src/Common/utility.h	(revision 294647bb36b8887ef83cb50ce4390321fab6d613)
+++ src/Common/utility.h	(revision 8ef9c5e7c34b1c5ff8f0ceff99f5b33aa922b62c)
@@ -320,5 +320,5 @@
 
 inline std::string to_string( const CodeLocation& location ) {
-	return location.filename + ":" + std::to_string(location.linenumber);
+	return location.linenumber >= 0 ? location.filename + ":" + std::to_string(location.linenumber) + " " : "";
 }
 #endif // _UTILITY_H