[wip] use lua_resume directly!

This makes other tests pass, but this is very WIP because it doesn't
destroy the thread, etc. Some setup is going wrong when running this
because this change produces segfaults with `r->connection->pool`
being unset.

src/common/lua/ngx_wasm_lua_ffi.c

@@ -336,8 +336,8 @@ property_handler(void *data, ngx_str_t *key, ngx_str_t *value)
     ngx_wasm_ffi_host_property_req_ctx_t   hprctx;
     ngx_proxy_wasm_ctx_t                  *pwctx = get_pwctx(hpctx->r);
     lua_State                             *co;
-    ngx_int_t                              rc = NGX_OK;
     ngx_wasm_lua_ctx_t                    *lctx;
+    int                                    rv;
 
     // FIXME if this function is changed to return NGX_AGAIN,
     // hprctx needs to be dynamically allocated:
@@ -384,14 +384,21 @@ property_handler(void *data, ngx_str_t *key, ngx_str_t *value)
 
     /* run handler */
 
-    rc = ngx_wasm_lua_thread_run(lctx);
-    if (rc == NGX_AGAIN) {
+    rv = lua_resume(lctx->co, lctx->nargs);
+    if (rv == LUA_YIELD) {
         ngx_wavm_log_error(NGX_LOG_ERR, pwctx->log, NULL,
         "cannot yield from host property handler");
 
         return NGX_ERROR;
     }
 
+    if (rv != 0) {
+        ngx_wavm_log_error(NGX_LOG_ERR, pwctx->log, NULL,
+        "Lua resume failed with error: %d", rv);
+
+        return NGX_ERROR;
+    }
+
     // ngx_wasm_assert(rc == NGX_DONE);
 
     return hprctx.rc;