bug#81609: 31.0.90; Loading debug overwrites debugger

> From: Stefan Monnier <[email protected]>
> Cc: Al Haji-Ali <[email protected]>,  [email protected]
> Date: Sat, 15 Aug 2026 14:49:34 -0400
> 
> >> In debug.el there's a naked setq (with an autoload cookie?)
> >> 
> >> ,----
> >> | ;;;###autoload
> >> | (setq debugger 'debug)
> >> `----
> >> 
> >> which means that whenever debug is required, the previous value of
> >> `debugger` is silently overwritten. In my case, I set in my config
> >> `debugger` to a custom value and `debug` was being lazy-loaded after it
> >> which was overwriting the value.
> >> 
> >> I am not sure why this is done, since `debugger` has the value `debug`
> >> by default.
> >
> > Stefan, any comments or suggestions?
> 
> That `setq` would benefit from being moved to `loadup.el`, indeed.

Done, and closing the bug.