bug#30823: 25.3; modification-hooks of overlays are not run in some cases

[Richard Stallman]

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  >   I was asking
  > > whether we want to support code which does this, because maybe it is
  > > unreasonable to delete an overlay from within its modification hook.

I think I see natural occasions to want to do just that, so I think we had
better support it.

-- 
Dr Richard Stallman
President, Free Software Foundation (https://gnu.org, https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)