diff --git a/CMakeLists.txt b/CMakeLists.txt
index d16b6e3..95ebe36 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,7 @@ enable_testing()
 
 project(
   libcopp
-  VERSION "2.1.1"
+  VERSION "2.1.2"
   DESCRIPTION "Cross-platform coroutine library in C++ ."
   HOMEPAGE_URL "https://libcopp.atframe.work"
   LANGUAGES C CXX ASM)
diff --git a/atframework/cmake-toolset b/atframework/cmake-toolset
index 3575c16..4ef61a7 160000
--- a/atframework/cmake-toolset
+++ b/atframework/cmake-toolset
@@ -1 +1 @@
-Subproject commit 3575c165f676f3ed8343ee481fde09856ec4a0e2
+Subproject commit 4ef61a71c5c299245bb8d609fbc99170ee522d9e
diff --git a/include/libcopp/coroutine/callable_promise.h b/include/libcopp/coroutine/callable_promise.h
index 19cbf1c..57d362e 100644
--- a/include/libcopp/coroutine/callable_promise.h
+++ b/include/libcopp/coroutine/callable_promise.h
@@ -7,6 +7,7 @@
 // clang-format off
 #include <libcopp/utils/config/stl_include_prefix.h>  // NOLINT(build/include_order)
 // clang-format on
+#include <cstdlib>
 #include <type_traits>
 // clang-format off
 #include <libcopp/utils/config/stl_include_suffix.h>  // NOLINT(build/include_order)
@@ -295,6 +296,10 @@ class LIBCOPP_COPP_API_HEAD_ONLY callable_future {
     initial_awaitable initial_suspend() noexcept { return {}; }
 #  if defined(LIBCOPP_MACRO_ENABLE_EXCEPTION) && LIBCOPP_MACRO_ENABLE_EXCEPTION
     void unhandled_exception() { throw; }
+#  elif defined(LIBCOPP_MACRO_HAS_EXCEPTION) && LIBCOPP_MACRO_HAS_EXCEPTION
+    void unhandled_exception() { throw; }
+#  else
+    void unhandled_exception() { std::abort(); }
 #  endif
   };
   using handle_type = LIBCOPP_MACRO_STD_COROUTINE_NAMESPACE coroutine_handle<promise_type>;
diff --git a/include/libcopp/utils/config/libcopp_build_features.h.in b/include/libcopp/utils/config/libcopp_build_features.h.in
index cd01075..8ebcf6e 100644
--- a/include/libcopp/utils/config/libcopp_build_features.h.in
+++ b/include/libcopp/utils/config/libcopp_build_features.h.in
@@ -83,6 +83,20 @@
 #cmakedefine THREAD_TLS_USE_PTHREAD @THREAD_TLS_USE_PTHREAD@
 #endif
 
+#if defined(__cpp_exceptions)
+#  define LIBCOPP_MACRO_HAS_EXCEPTION __cpp_exceptions
+#elif defined(__EXCEPTIONS) && __EXCEPTIONS
+#  define LIBCOPP_MACRO_HAS_EXCEPTION 1
+#elif defined(__clang__)
+#  if __has_feature(cxx_exceptions)
+#    define LIBCOPP_MACRO_HAS_EXCEPTION 1
+#  endif
+#elif defined(_MSC_VER)
+#  if defined(_CPPUNWIND)
+#    define LIBCOPP_MACRO_HAS_EXCEPTION 1
+#  endif
+#endif
+
 #cmakedefine01 LIBCOPP_MACRO_ENABLE_STD_COROUTINE
 #cmakedefine01 LIBCOPP_MACRO_USE_STD_EXPERIMENTAL_COROUTINE
 #cmakedefine01 LIBCOPP_MACRO_ENABLE_EXCEPTION
diff --git a/include/libcotask/task_promise.h b/include/libcotask/task_promise.h
index 56827b4..913c0e6 100644
--- a/include/libcotask/task_promise.h
+++ b/include/libcotask/task_promise.h
@@ -16,6 +16,7 @@
 #include <libcopp/utils/config/stl_include_prefix.h>  // NOLINT(build/include_order)
 // clang-format on
 #include <assert.h>
+#include <cstdlib>
 #include <functional>
 #include <type_traits>
 
@@ -1231,6 +1232,10 @@ class LIBCOPP_COTASK_API_HEAD_ONLY task_future
       throw;
       // get_context()->last_exception_ = std::current_exception();
     }
+#  elif defined(LIBCOPP_MACRO_HAS_EXCEPTION) && LIBCOPP_MACRO_HAS_EXCEPTION
+    void unhandled_exception() { throw; }
+#  else
+    void unhandled_exception() { std::abort(); }
 #  endif
 
     template <class TCONVERT_PRIVATE_DATA>