From 6dcc7e29df3bef708b8e0816425b2e9ad8824525 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Mon, 9 Apr 2018 11:48:20 -0700
Subject: [PATCH] ircd::fmt: Leave useful note for assertion.

---
 ircd/fmt.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ircd/fmt.cc b/ircd/fmt.cc
index 14ce9342b..1f1eb6c58 100644
--- a/ircd/fmt.cc
+++ b/ircd/fmt.cc
@@ -274,7 +274,8 @@ try
 	auto it(begin(v));
 	for(size_t i(0); i < v.size(); ++it, i++)
 	{
-		assert(!finished());
+		assert(!finished()); // You passed too many arguments for your format string
+
 		const auto &ptr(get<0>(*it));
 		const auto &type(get<1>(*it));
 		argument(std::make_tuple(ptr, std::type_index(*type)));