From 2742727a0beabaf5b8ae82ff9ee8596cce91b7f4 Mon Sep 17 00:00:00 2001
From: couriersud <couriersud@gmx.org>
Date: Wed, 29 Jan 2020 18:51:26 +0100
Subject: [PATCH] netlist: Fix crash in infix function evaluation. (nw)

---
 src/lib/netlist/plib/pfunction.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/netlist/plib/pfunction.cpp b/src/lib/netlist/plib/pfunction.cpp
index cf43ddc0dde..f05a92ad339 100644
--- a/src/lib/netlist/plib/pfunction.cpp
+++ b/src/lib/netlist/plib/pfunction.cpp
@@ -211,7 +211,7 @@ namespace plib {
 				}
 				else if (p == 0) // Function or variable
 				{
-					if (sexpr[i+1] == "(")
+					if ((i+1<sexpr.size()) && sexpr[i+1] == "(")
 						opstk.push(s);
 					else
 						postfix.push_back(s);