TEST_F(WhenAllSucceedTest, DoesNotReturnBrokenPromiseIfExecutorShutdownWhileWaiting) {
    // create a future waits on a barrier

    const auto kNumInputs = 5;
    auto [inputPromises, rawInputFutures] = makePromisesAndFutures<void>(kNumInputs);

    // Turn raw input Futures into ExecutorFutures.
    std::vector<ExecutorFuture<void>> inputFutures;
    for (auto i = 0; i < kNumInputs; ++i) {
        inputFutures.emplace_back(std::move(rawInputFutures[i]).thenRunOn(executor()));
    }

    auto result = whenAllSucceed(std::move(inputFutures));

    executor()->shutdown();

    for (auto i = 0; i < kNumInputs; ++i) {
        inputPromises[i].emplaceValue();
    }

    result.get();
}