bug#40152: 27.0.90; icomplete vs recursive prompts

[Eli Zaretskii]

> From: Kévin Le Gouguec <kevin.legouguec@gmail.com>
> Date: Fri, 20 Mar 2020 19:21:01 +0100
> 
> - "Synthetic" reproduction recipe:
>     - (completing-read "Foo? " (tags-lazy-completion-table))
> 
> - With actual user commands:
>     - C-x b foo RET
>       - or any non-Lisp buffer, so that xref picks the etags backend
>     - M-.
> 
> >From there:
> 
> - Try to input a character.
>     - The identifier prompt is interrupted by the etags prompt ("Visit
>       tags table").
> - Try to input a character.
>     - The etags prompt disappears and we're back to the identifier
>       prompt.
> 
> The identifier prompt is replaced with the etags prompt as soon as a
> single character is typed.  While in the etags prompt, one can use
> icomplete commands (e.g. TAB, C-.) as well as C-q CHAR to input
> characters one-by-one.

What would you like to happen instead?