34d470967a
Fixes #10020 Previous fix445e1d3tried to close one double invocation, but added another, since it failed to ensure all potential nullings of the opt shared_future happened before a new allocator could reset it. This simplifies the code by making clearing the shared_future a pre-requisite for resolving its contents (as read by waiters). Also removes any need for try-catch etc. Closes #10024 (cherry picked from commit1e66043412)