proxy: fix crash in await during SIGHUP reloads

- The await return process uses the "main" VM to move the response into
  the table we will eventually return to the user.
- During the reload routine a nil can be left on the top of the main VM
  stack.
- Safest to just use top-relative indexing for most cases where we use
  the main VM and aren't explicitly clearing the stack beforehand.

1 files changed, 1 insertions, 1 deletions

diff --git a/proxy_await.c b/proxy_await.c
index 5e379db..4a548a3 100644
--- a/proxy_await.c
+++ b/proxy_await.c
@@ -380,7 +380,7 @@ int mcplib_await_return(io_pending_proxy_t *p) {
         // couldn't find a table.insert() equivalent; so this is
         // inserting into the length + 1 position manually.
         //dump_stack(L);
-        lua_rawseti(L, 1, lua_rawlen(L, 1) + 1); // pops mcpres
+        lua_rawseti(L, -2, lua_rawlen(L, 1) + 1); // pops mcpres
         lua_pop(L, 1); // pops restable
     }