added error msg for missing params

src/program.cpp

@@ -2,6 +2,7 @@
 #include <migraph/stringutils.hpp>
 #include <migraph/instruction.hpp>
 #include <migraph/env.hpp>
+#include <migraph/ranges.hpp>
 #include <migraph/time.hpp>
 #include <migraph/iterator_for.hpp>
 #include <iostream>
@@ -329,8 +330,10 @@ argument generic_eval(const program& p,
         else if(ins->name() == "@param")
         {
             results.emplace(ins, trace(ins, [&] {
-                                return params.at(
-                                    any_cast<builtin::param>(ins->get_operator()).parameter);
+                                auto param_name = any_cast<builtin::param>(ins->get_operator()).parameter;
+                                if (not contains(params,param_name))
+                                    MIGRAPH_THROW("Parameter not found: " + param_name);
+                                return params.at(param_name);
                             }));
         }
         else if(ins->name() == "@outline")

test/eval_test.cpp

@@ -104,6 +104,21 @@ void param_test()
     EXPECT(result != migraph::literal{4});
 }
 
+void param_error_test()
+{
+    migraph::program p;
+
+    auto x = p.add_parameter("x", {migraph::shape::int64_type});
+    auto y = p.add_parameter("y", {migraph::shape::int64_type});
+
+    p.add_instruction(sum_op{}, x, y);
+    EXPECT(test::throws<migraph::exception>(
+        [&] {
+            p.eval({{"x", migraph::literal{1}.get_argument()}});
+        },
+        "Parameter not found"));
+}
+
 void replace_test()
 {
     migraph::program p;
@@ -215,6 +230,7 @@ int main()
     literal_test2();
     print_test();
     param_test();
+    param_error_test();
     replace_test();
     replace_ins_test();
     replace_ins_test2();

test/include/test.hpp

@@ -140,7 +140,7 @@ bool throws(F f)
     }
 }
 
-template <class F, class Exception>
+template <class Exception, class F>
 bool throws(F f, const std::string& msg = "")
 {
     try