<generator>: Add death tests

tests/std/test.lst

@@ -649,6 +649,7 @@ tests\P2474R2_views_repeat
 tests\P2474R2_views_repeat_death
 tests\P2494R2_move_only_range_adaptors
 tests\P2502R2_generator
+tests\P2502R2_generator_death
 tests\P2502R2_generator_promise
 tests\P2505R5_monadic_functions_for_std_expected
 tests\P2510R3_text_formatting_pointers

tests/std/tests/P2502R2_generator_death/env.lst

@@ -0,0 +1,4 @@
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+RUNALL_INCLUDE ..\usual_latest_matrix.lst

tests/std/tests/P2502R2_generator_death/test.cpp

@@ -0,0 +1,50 @@
+// Copyright (c) Microsoft Corporation.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+#include <generator>
+#include <utility>
+
+#include <test_death.hpp>
+
+std::generator<int> gen() {
+    co_return;
+}
+
+void test_begin_after_initial_suspend_point() {
+    auto g = gen();
+    (void) g.begin();
+    (void) g.begin();
+}
+
+void test_begin_after_moving_from() {
+    auto g  = gen();
+    auto g2 = std::move(g);
+    (void) g.begin();
+}
+
+void test_end_iterator_dereference() {
+    auto g = gen();
+    auto i = g.begin();
+    (void) *i;
+}
+
+void test_end_iterator_incrementation() {
+    auto g = gen();
+    auto i = g.begin();
+    ++i;
+}
+
+int main(int argc, char** argv) {
+    std_testing::death_test_executive exec;
+
+#ifdef _DEBUG
+    exec.add_death_tests({
+        test_begin_after_initial_suspend_point,
+        test_begin_after_moving_from,
+        test_end_iterator_dereference,
+        test_end_iterator_incrementation,
+    });
+#endif // _DEBUG
+
+    return exec.run(argc, argv);
+}