Re: New multi-command facility displays in the wrong echo area.

[Gregory Heytings]

> When just the isearch is active, f10 does indeed work.  When, 
> additionally, C-x b is active on another frame, it throws the error 
> "Command attempted to use minibuffer while in minibuffer".  This is 
> surely correct.  However, the isearch highlighting doesn't get removed 
> in this error case.  That is incorrect.

It's not removed because isearch is not aborted.  You can continue your 
isearch or abort it with C-g.  That's a difference indeed: in earlier 
Emacsen isearch would have aborted in this case.  Which one is better is 
not clear to me.

> > Yet another similar use case is when you type "C-x 8 RET" during 
> > Isearch: that reads the character's name/codepoint from the minibuffer.
>
> This goes wrong.  With C-x b active on frame F1, move to F2, start an 
> isearch, C-x 8 RET, use TAB completion to select a character and RET. 
> This displays
>
>    Switch to buffer (default xdisp.c):  [Failing I-search: su�]
>
> on F2.  On terminating the isearch and completing the C-x b action in 
> F2's minibufer, the buffer switch has worked in frame F1.

It doesn't go wrong, it has moved the minibuffer from frame F1 to frame 
F2.