IAsyncOperation::GetResults returns an object that has been destructed. #1008
Description
Reproduced cpp/winrt version: 2.0.201201.7 and 2.0.210806.1
IAsyncOperation::GetResults returns an object that has been destructed. But in the same situation, I can use IAsyncOperation::get instead to get the correct object. Is it a bug? Or I missed something?
A minimal example to reproduce this issue:
winrt::HttpClient client;
winrt::IAsyncOperation<winrt::JsonObject> GetAsync(winrt::Uri rest_uri) {
auto resp { co_await client.GetAsync(rest_uri) };
if (!resp.IsSuccessStatusCode())
winrt::throw_hresult(MAKE_HRESULT(SEVERITY_ERROR, FACILITY_HTTP, resp.StatusCode()));
auto rest_content { co_await resp.Content().ReadAsStringAsync() };
auto res = winrt::JsonObject::Parse(rest_content);
// at least here, res is correct
co_return res;
}
int main()
{
winrt::init_apartment();
auto get_op = GetAsync(winrt::Uri([ some URI returning json data ]));
while (get_op.Status() == winrt::AsyncStatus::Started); // just wait
if (get_op.Status() != winrt::AsyncStatus::Completed || !get_op.GetResults())
return get_op.Status() == winrt::AsyncStatus::Canceled ? E_ABORT : get_op.ErrorCode().value;
auto res = get_op.GetResults();
// here res is "null" in debugger
wprintf(L"%s\n", get_op.GetResults().ToString().c_str()); // failed: access violation (object already deleted)
return 0;
}