Idle timers with the active minibuffer

[Juri Linkov]

Why idle timers don't run when the minibuffer is activated?

I discovered this behavior when tried using isearch in the original
buffer after switching to it from the minibuffer without exiting it.
The idle timer for lazy-highlighting doesn't run.  Steps to reproduce:

1. activate the minibuffer by e.g. `M-:'
2. switch back to the original buffer by `C-x o'
3. start isearch C-s and search for a string that have multiple
occurrences in the original buffer.

Other occurrences are not highlighted by lazy-highlight face.
Putting a breakpoint on isearch-lazy-highlight-update shows
that run-with-idle-timer from isearch-lazy-highlight-new-loop
never runs it when the minibuffer is not yet exited.

Is it an intentional behavior or a bug?

-- 
Juri Linkov
http://www.jurta.org/emacs/