From e2e5b9842c3d2b1324567da76693849b58e48b64 Mon Sep 17 00:00:00 2001
From: Kristoffer Carlsson <kcarlsson89@gmail.com>
Date: Wed, 20 Jun 2018 12:47:12 +0200
Subject: [PATCH] manually inline setfield! in Stateful popfirst!

---
 base/iterators.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/base/iterators.jl b/base/iterators.jl
index 1ce2d65264d01..3595bc9028920 100644
--- a/base/iterators.jl
+++ b/base/iterators.jl
@@ -1075,7 +1075,7 @@ convert(::Type{Stateful}, itr) = Stateful(itr)
         throw(EOFError())
     else
         val, state = vs
-        s.nextvalstate = iterate(s.itr, state)
+        Core.setfield!(s, :nextvalstate, iterate(s.itr, state))
         s.taken += 1
         return val
     end