bug#70136: 30.0.50; compilation-mode [was: comint-mode] doesn't call hack-dir-local-variables-non-file-buffer

[Juri Linkov]

> @@ -2372,6 +2363,11 @@ compilation-mode
>    ;; some other input event happens.
>    (setq-local jit-lock-defer-time nil)
>    (setq buffer-read-only t)
> +  (unless (buffer-file-name)
> +    (let ((sym (make-symbol "hack-dir-local-variables-non-file-buffer")))
> +      (set sym #'hack-dir-local-variables-non-file-buffer)
> +      ;; Ensure hack-dir-locals is called only after a derived mode is set.
> +      (push sym delayed-mode-hooks)))
>    (run-mode-hooks 'compilation-mode-hook))

Thanks for the patch.  I confirm it completely fixes the bug
reported at the end of bug#68570.