Re: Bug or feature?

[Stefan Monnier <monnier@iro.umontreal.ca>]

>> There is an elaborate segment of code in reset_buffer_local_variables
>> for, among other actions, eliminating outdated value cells from
>> buffer-local symbols that is not run when the shortcut is taken of
>> clearing local_var_alist_ in the case where PERMANENT_TOO is set, which
>> I suspect results in variable watchers being ignored and outdated symbol
>> values persisting.  Is there a specific reason for this discrepancy, or
>> is it just an oversight?
> Stefan, any comments?

Yes, it was an oversight in my commit 3ddff0803415.

This code also has another related problem because the var watchers can
change `local_var_alist`.  And I can't see in the code what prevents us
from running the watcher twice for those vars with `Qpermanent_local_hook`.
Oh, and calling `swap_in_global_binding` doesn't sound quite right
if we don't kill the var (because of `Qpermanent_local_hook`).


        Stefan