Workaround MSVC bug.

Author: lucteo

include/stdexec/__detail/__bulk.hpp

@@ -219,10 +219,14 @@ namespace stdexec {
                            __shape_t __begin,
                            __shape_t __end,
                            auto&&... __vs) mutable //
-            noexcept(noexcept(__data.__fun_(__begin++, __vs...))) {
-              while (__begin != __end)
-                __func(__begin++, __vs...);
-            };
+#if !STDEXEC_MSVC()
+            // MSVCBUG https://developercommunity.visualstudio.com/t/noexcept-expression-in-lambda-template-n/10718680
+            noexcept(noexcept(__data.__fun_(__begin++, __vs...)))
+#endif
+          {
+            while (__begin != __end)
+              __func(__begin++, __vs...);
+          };
 
           // Lower `bulk` to `bulk_chunked`. If `bulk_chunked` is customized, we will see the customization.
           return bulk_chunked(

test/stdexec/algos/adaptors/test_bulk.cpp

@@ -148,6 +148,8 @@ namespace {
     error_scheduler sched2{};
     error_scheduler<int> sched3{43};
 
+#if !STDEXEC_MSVC()
+    // MSVCBUG https://developercommunity.visualstudio.com/t/noexcept-expression-in-lambda-template-n/10718680
     check_err_types<ex::__mset<>>( //
       ex::transfer_just(sched1) | ex::bulk(ex::par, n, [](int) noexcept { }));
     check_err_types<ex::__mset<std::exception_ptr>>( //
@@ -158,6 +160,7 @@ namespace {
       ex::transfer_just(sched3) | ex::bulk(ex::par, n, [](int) noexcept { }));
     check_err_types<ex::__mset<std::exception_ptr, int>>( //
       ex::transfer_just(sched3) | ex::bulk(ex::par, n, [](int) { throw std::logic_error{"err"}; }));
+#endif
   }
 
   TEST_CASE("bulk_chunked keeps error_types from input sender", "[adaptors][bulk]") {