From 3f5c2b86b7dcd1d8b5a2eacad92b659ac9709a53 Mon Sep 17 00:00:00 2001
From: Sverker Eriksson <sverker@erlang.org>
Date: Wed, 6 Feb 2019 20:17:39 +0100
Subject: erts: Fix faulty debug assert in enif_select

---
 erts/emulator/beam/erl_nif.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'erts/emulator/beam/erl_nif.c')

diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index ee6e6085b6..17041cc91c 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -2354,6 +2354,13 @@ static void dtor_demonitor(ErtsMonitor* mon, void* context)
     erts_proc_sig_send_demonitor(mon);
 }
 
+#ifdef DEBUG
+int erts_dbg_is_resource_dying(ErtsResource* resource)
+{
+    return resource->monitors && rmon_is_dying(resource->monitors);
+}
+#endif
+
 #  define NIF_RESOURCE_DTOR &nif_resource_dtor
 
 static int nif_resource_dtor(Binary* bin)
-- 
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