From 3c7a4106ed20d92f4352cdb6e3394c2a8762ba44 Mon Sep 17 00:00:00 2001
From: Antonin Portelli <antonin.portelli@me.com>
Date: Mon, 7 May 2018 17:26:39 +0100
Subject: [PATCH] Trap for deadly empty comm thread option

---
 lib/util/Init.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/util/Init.cc b/lib/util/Init.cc
index 45a37a02..7dc8230e 100644
--- a/lib/util/Init.cc
+++ b/lib/util/Init.cc
@@ -385,6 +385,7 @@ void Grid_init(int *argc,char ***argv)
   if( GridCmdOptionExists(*argv,*argv+*argc,"--comms-threads") ){
     arg= GridCmdOptionPayload(*argv,*argv+*argc,"--comms-threads");
     GridCmdOptionInt(arg,CartesianCommunicator::nCommThreads);
+    assert(CartesianCommunicator::nCommThreads > 0);
   }
   if( GridCmdOptionExists(*argv,*argv+*argc,"--cacheblocking") ){
     arg= GridCmdOptionPayload(*argv,*argv+*argc,"--cacheblocking");