balloonexpr not called after a long while

[Ni Va]

Hi,

I use balloonexpr feature in order to display some grabbed informations of content of file.

Nota : the balloonexpr function uses search inner func of Vim to search for informations (like line number of begin/end block code)

The functionnality runs for a while and I don't know why after some failure normal search or some time, the balloonexpr is not evaluated/called anymore.

1/ This balloonexr function is enabled by autocommand event triggers:

function! awl#autocmd() "{{{
  augroup Awl
au! Awl
au BufEnter *.awl set filetype=awl
au BufEnter *.awl call s:enableballoon()
au BufLeave *.awl call s:disableballoon()
  augroup END
endfunction "}}}

2/ The enabling balloon func consists in setting some of help's advises:

function! s:enableballoon() "{{{
  call <SID>trace('enable balloon')
  set ballooneval balloonevalterm            <---
  set balloonexpr=awl#BalloonExpr()       <---
  let s:winid = 0
  let s:balloonText = ''
endfu

3/ Balloonexpr is not called after a while or fail search:

function! awl#BalloonExpr() "{{{

Thank you