From 8673510d7e771e65fed0b1cb1a0733d52e263833 Mon Sep 17 00:00:00 2001
From: Laurent Huberdeau <laurenthuberd@gmail.com>
Date: Sun, 29 Sep 2024 23:34:52 -0400
Subject: [PATCH] Fix compound test when OPTIMIZE_CONSTANT_PARAM

---
 sh.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sh.c b/sh.c
index 82a4d4f2..ec11f53b 100644
--- a/sh.c
+++ b/sh.c
@@ -2109,6 +2109,8 @@ void mark_mutable_variables_statement(ast node) {
   int op = get_op(node);
   ast params;
 
+  if (node == 0) return;
+
   if (op == IF_KW) {
     mark_mutable_variables_statement(get_child(node, 0));
     if (get_child(node, 1)) mark_mutable_variables_body(get_child(node, 1));