From b38add8de55c7dd90e0f2a200f8c5a19a494d088 Mon Sep 17 00:00:00 2001
From: takase1121 <20792268+takase1121@users.noreply.github.com>
Date: Thu, 8 Jul 2021 11:20:08 +0800
Subject: [PATCH] move arg checking code to the top

---
 src/api/process.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/api/process.c b/src/api/process.c
index 5b26871f..168fcf9c 100644
--- a/src/api/process.c
+++ b/src/api/process.c
@@ -59,6 +59,13 @@ static int process_start(lua_State* L)
 {
     int cmd_len = lua_rawlen(L, 1) + 1;
     const char** cmd = malloc(sizeof(char *) * cmd_len);
+    luaL_checktype(L, 1, LUA_TTABLE);
+    if (lua_isnoneornil(L, 2)) {
+        lua_settop(L, 1); // remove the nil if it's there
+        lua_newtable(L);
+    }
+    luaL_checktype(L, 2, LUA_TTABLE);
+
     ASSERT_MALLOC(cmd);
     cmd[cmd_len] = NULL;