From 7fd30cdc78ad25db1f4f1f5e615ac5338ed8411b Mon Sep 17 00:00:00 2001
From: DerThorsten <derthorstenbeier@gmail.com>
Date: Tue, 29 Jun 2021 14:25:41 +0200
Subject: [PATCH 1/2] added throwing test

---
 test/test_zfunction.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/test/test_zfunction.cpp b/test/test_zfunction.cpp
index 39b307c..39b65e3 100644
--- a/test/test_zfunction.cpp
+++ b/test/test_zfunction.cpp
@@ -140,5 +140,25 @@ namespace xt
 
         EXPECT_EQ(zres.get_array<double>(), expected);
     }
+
+    TEST_CASE("bad_function_call")
+    {
+
+        zdispatcher_t<detail::plus, 2>::init();
+
+
+        auto x0 = xarray<int>::from_shape({2,2});
+        auto x1 = xarray<int>::from_shape({2,2});
+
+        zarray z0(x0);
+        zarray z1(x1);
+
+        auto res = xarray<double>::from_shape({2,2});
+        zarray zres(res);
+
+        zres =  x0 + x1;
+
+    }
+
 }
 TEST_SUITE_END();
\ No newline at end of file

From 369d0e29dd62c47df9350ecc947fe0ad8f231214 Mon Sep 17 00:00:00 2001
From: DerThorsten <derthorstenbeier@gmail.com>
Date: Tue, 29 Jun 2021 18:37:51 +0200
Subject: [PATCH 2/2] updated issue

---
 test/test_zfunction.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/test_zfunction.cpp b/test/test_zfunction.cpp
index 39b65e3..c83cba2 100644
--- a/test/test_zfunction.cpp
+++ b/test/test_zfunction.cpp
@@ -145,8 +145,8 @@ namespace xt
     {
 
         zdispatcher_t<detail::plus, 2>::init();
-
-
+        zdispatcher_t<detail::xassign_dummy_functor, 1>::init();
+    
         auto x0 = xarray<int>::from_shape({2,2});
         auto x1 = xarray<int>::from_shape({2,2});
 
@@ -156,7 +156,7 @@ namespace xt
         auto res = xarray<double>::from_shape({2,2});
         zarray zres(res);
 
-        zres =  x0 + x1;
+        zres =  z0 + z1;
 
     }