From 19cea16ef9d5b1bd9c501899aa4c07f6be8a6740 Mon Sep 17 00:00:00 2001
From: Patrick Shriwise <pshriwise@gmail.com>
Date: Mon, 7 Dec 2020 19:29:59 -0600
Subject: [PATCH] Adding check that the LibMeshInit object is set.

---
 src/initialize.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/initialize.cpp b/src/initialize.cpp
index c6d8250c1..d30581e06 100644
--- a/src/initialize.cpp
+++ b/src/initialize.cpp
@@ -68,7 +68,7 @@ int openmc_init(int argc, char* argv[], const void* intracomm)
 #endif
 
 // initialize libMesh if it hasn't been initialized already
-// by a call external to OpenMC
+// (if initialized externally, the LMI object needs to be provided also)
 if (!settings::LMI && !libMesh::initialized())
 {
 #ifdef OPENMC_MPI
@@ -81,6 +81,10 @@ if (!settings::LMI && !libMesh::initialized())
   settings::LMI = std::make_unique<libMesh::LibMeshInit>(argc, argv, 0, n_threads);
 #endif
 }
+
+if (!settings::LMI) {
+  fatal_error("libMesh::LibMeshInit object isn't set.");
+}
 #endif
 
   // Start total and initialization timer