From f6b251145f18d4e28542e4d6f3f7f4c94a9ab35f Mon Sep 17 00:00:00 2001
From: Patrick Shriwise <pshriwise@gmail.com>
Date: Sat, 16 Mar 2019 12:48:47 -0500
Subject: [PATCH] Placing id read in try-catch.

---
 src/dagmc.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/dagmc.cpp b/src/dagmc.cpp
index 435cb42184..456f9f2795 100644
--- a/src/dagmc.cpp
+++ b/src/dagmc.cpp
@@ -113,7 +113,15 @@ void legacy_assign_material(const std::string& mat_string,
 
   // if no material was set using a name, assign by id
   if (!mat_found_by_name) {
-    c->material_.emplace_back(std::stoi(mat_string));
+    try {
+      auto id = std::stoi(mat_string);
+      c->material_.emplace_back(id);
+    } catch (...) {
+      std::stringstream err_msg;
+      err_msg << "No material " << mat_string
+              << " found for volume (cell) " << c->id_;
+      fatal_error(err_msg);
+    }
   }
 
   if (settings::verbosity >= 10) {