Unsound sending of non-Send types across threads in threadalone
Affected versions can run the Drop impl of a non-Send type on a different thread than it was created on. The flaw occurs when a stderr write performed by the threadalone crate fails, for example because stderr is redirected to a location on a filesystem that is full, or because stderr is a pipe that has been closed by the reader. Dropping a non-Send type on the wrong thread is …