What causes trouble here is the fact that Emacs changes the current
buffer behind the scenes (somewhere in the main loop), so at the end
of the function it is not known what the buffer will be current after
the function finishes. But sometimes it is desirable to perform some
actions on that buffer (e.g. run hooks).
I don't understand what you mean by "trouble"--the scenario is not
clearly specified. It is a basic feature that the main loop sets the
current buffer. It is a basic feature that with-current-buffer
preserves the current buffer.
Maybe with-current-buffer should keep track of switching buffers
inside with-current-buffer, so it could anticipate what a buffer will
be set as current and don't restore the old buffer.
Certainly not. with-current-buffer must do its job reliably.
Or maybe `pop-to-buffer inside with-current-buffer' is not a suitable
programming construct (I mean mostly for the `next-error' command
where this problem occurred)
There is nothing wrong with it in principle, no reason why it should
in general be avoided. It might not be the right thing for the
specific place you have in mind.
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