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From: "rafael at espindo dot la" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/95137] Sanitizers seem to be missing support for
 coroutines
Date: Wed, 20 May 2020 20:15:27 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95137

--- Comment #18 from Rafael Avila de Espindola <rafael at espindo dot la> -=
--
(In reply to Avi Kivity from comment #17)
> Is that the test were a lambda coroutine is called from future::then()? In
> that case it's a real use-after-free.

It was reduced from that to just

#include <seastar/core/app-template.hh>
#include <seastar/core/coroutine.hh>
using namespace seastar;
int main(int argc, char** argv) {
    seastar::app_template app;
    app.run(argc, argv, [] () -> future<> {
        future<> xyz =3D make_ready_future<>().then([] {});
        co_await std::move(xyz);
    });
    return 0;
}

Which doesn't have a user after free.=