bug#39667: 26.2; Restarting a *shell* buffer breaks saving history

[Lars Ingebrigtsen]

ndame <emacsuser@freemail.hu> writes:

> Restart the shell with M-x shell.
>
> Check the value of comint-input-ring-file-name. It's nil, because
> comint-input-ring has already has a value from the previous
> invocation, so shell-mode skips the whole history setup: (when
> (ring-empty-p comint-input-ring) ...

Yup.  This should now be fixed in Emacs 28.

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