From 1e3b395ed422996cb1db5bd03a49bd6a3b7e798a Mon Sep 17 00:00:00 2001
From: Anna Henningsen <anna@addaleax.net>
Date: Tue, 21 Nov 2017 12:39:55 +0100
Subject: [PATCH] http2: don't call into JS from GC

Calling into JS land from GC is not allowed, so delay
the resolution of pending pings when a session is destroyed.
---
 src/node_http2.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/node_http2.cc b/src/node_http2.cc
index b439ae588a7756..52883dcd644bfc 100644
--- a/src/node_http2.cc
+++ b/src/node_http2.cc
@@ -406,7 +406,11 @@ void Http2Session::Close() {
 
   while (!outstanding_pings_.empty()) {
     Http2Session::Http2Ping* ping = PopPing();
-    ping->Done(false);
+    // Since this method may be called from GC, calling into JS directly
+    // is not allowed.
+    env()->SetImmediate([](Environment* env, void* data) {
+      static_cast<Http2Session::Http2Ping*>(data)->Done(false);
+    }, static_cast<void*>(ping));
   }
 
   Stop();