bug#56528: 29.0.50; Emacs lucid segfaults when X dies

[Po Lu]

Eli Zaretskii <eliz@gnu.org> writes:

> The reason seems to be that the selected-frame wasn't changed to be a
> valid usable frame.

Right, but under daemon mode, shouldn't `delete_frame' eventually select
the initial frame?

> But I wonder how the above is different from simply crashing.

When there are multiple terminals, it allows suriving the disconnect of
a single terminal.