From 114858452643fa4beddd7849520873ad783b7727 Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Mon, 14 Sep 2015 00:26:50 +0900
Subject: [PATCH] nghttpx: Reserve room for required header fields for
 PUSH_PROMISE

---
 src/shrpx_http2_upstream.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/shrpx_http2_upstream.cc b/src/shrpx_http2_upstream.cc
index 6455aec9..859eea2e 100644
--- a/src/shrpx_http2_upstream.cc
+++ b/src/shrpx_http2_upstream.cc
@@ -1648,7 +1648,8 @@ int Http2Upstream::submit_push_promise(const std::string &scheme,
                                        Downstream *downstream) {
   int rv;
   std::vector<nghttp2_nv> nva;
-  nva.reserve(downstream->get_request_headers().size());
+  // 4 for :method, :scheme, :path and :authority
+  nva.reserve(4 + downstream->get_request_headers().size());
 
   // juse use "GET" for now
   nva.push_back(http2::make_nv_ll(":method", "GET"));