From 50c8dc6d96c3e805407a1f0ad0cfdaff7d1e6ff0 Mon Sep 17 00:00:00 2001
From: Arnaud Giersch <arnaud.giersch@univ-fcomte.fr>
Date: Wed, 25 Dec 2019 22:29:51 +0100
Subject: [PATCH] Host may be null (fix crash with logs).

---
 src/s4u/s4u_Host.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/s4u/s4u_Host.cpp b/src/s4u/s4u_Host.cpp
index 73195c55a4..5022080dd9 100644
--- a/src/s4u/s4u_Host.cpp
+++ b/src/s4u/s4u_Host.cpp
@@ -660,7 +660,13 @@ sg_host_t sg_host_self()
 /* needs to be public and without simcall for exceptions and logging events */
 const char* sg_host_self_get_name()
 {
-  return SIMIX_is_maestro() ? "" : simgrid::kernel::actor::ActorImpl::self()->get_host()->get_cname();
+  const char* res = "";
+  if (not SIMIX_is_maestro()) {
+    simgrid::s4u::Host* host = simgrid::kernel::actor::ActorImpl::self()->get_host();
+    if (host != nullptr)
+      res = host->get_cname();
+  }
+  return res;
 }
 
 double sg_host_load(sg_host_t host)
-- 
2.20.1