For nested timers with the same timeout, we can get into a situation
where we have recreated a timer list immediately before we need to
clean up an old timer list with the same key. Fix: make sure the list
to be deleted is the same instance as the list whose reference was used
to determine that a cleanup is necessary. If it's not the same instance,
a new list with the same key has been created, and it should not be
deleted.
Fixes: https://github.com/nodejs/node/issues/7722
PR-URL: https://github.com/nodejs/node/pull/7827
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Julien Gilli <jgilli@fastmail.fm>
Erin Spiceland