From 3a0439de04ae76f5eb097b224cb7d60059c547a8 Mon Sep 17 00:00:00 2001
From: Leo Horie <leohorie@hotmail.com>
Date: Fri, 31 Oct 2014 21:35:32 -0400
Subject: [PATCH] add error message for case of bad serialize

---
 mithril.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mithril.js b/mithril.js
index 4f5ffa35..15f3cfb4 100644
--- a/mithril.js
+++ b/mithril.js
@@ -885,6 +885,7 @@ Mithril = m = new function app(window, undefined) {
 				if (maybeXhr != null) xhr = maybeXhr
 			}
 
+			if (!isStr(options.data) && options.data.constructor != window.FormData) throw "Request data should be either be a string or FormData. Check the `serialize` option in `m.request`"
 			xhr.send(options.method == "GET" || !options.data ? "" : options.data)
 			return xhr
 		}