From 4c5d586249d390c8b4f1738e60f4d65776b748e8 Mon Sep 17 00:00:00 2001
From: Fabian Homborg <FHomborg@gmail.com>
Date: Fri, 10 Sep 2021 20:06:03 +0200
Subject: [PATCH] tinyexpr: Check for null-pointer

---
 src/tinyexpr.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tinyexpr.cpp b/src/tinyexpr.cpp
index fe226781d..1d0d7bcc5 100644
--- a/src/tinyexpr.cpp
+++ b/src/tinyexpr.cpp
@@ -586,7 +586,7 @@ double te_eval(const te_expr *n) {
 
 static void optimize(te_expr *n) {
     /* Evaluates as much as possible. */
-    if (n->type == TE_CONSTANT) return;
+    if (!n || n->type == TE_CONSTANT) return;
 
     const int arity = get_arity(n->type);
     bool known = true;