Fix a callback leak that would occur when dropping a subscription to a callback collection after triggering that callback, but before processing the effect of *adding* the handler. Co-authored-by: Kay Simmons <kay@zed.dev>
Fix a callback leak that would occur when dropping a subscription to a callback collection after triggering that callback, but before processing the effect of *adding* the handler. Co-authored-by: Kay Simmons <kay@zed.dev>