From f27edd36d73db3a0bb9758bb90746afa3751b32f Mon Sep 17 00:00:00 2001
From: Paul Mathieu <paul@ponteilla.net>
Date: Sat, 7 May 2022 11:34:35 -0700
Subject: [PATCH] as: fix empty param list

nop was failing
---
 tools/as.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/as.py b/tools/as.py
index 3cc60b0..d3b56a8 100644
--- a/tools/as.py
+++ b/tools/as.py
@@ -37,6 +37,8 @@ class AsTransformer(lark.Transformer):
 
     def statement(self, s):
         opcode, *params = s
+        if params[0] is None:
+            params = []
         addr = self.addr
         self.addr += 2
         return ('OP', addr, opcode, *params)