Re: pdf changes every few compilations, although changing nothing

[David Nalesnik]

On Mon, Apr 10, 2017 at 5:36 AM, Thomas Morley <address@hidden> wrote:
> Hi all,
>
> with the code below I experienced some pretty strange behaviour.
>
> The visual output changes every few compilations, although I changed 
> _nothing_!!
> In average two times in 10 compilations.
>
>
> Furthermore:
> While uncommenting the second example things change again:
> First example prints correct, second always wrong.
> Then commenting first example causes always correct output for the second.
>
>
> I use self-compiled 2.19.60 from
> commit 777ce245ecf9041a98d977f017c10b4edabaec04
> Author: Phil Holmes <address@hidden>
> Date:   Mon Apr 10 08:28:15 2017 +0100
>
>     Release: bump VERSION.
>
>
> I'm aware there were some recent changes to the bracket code and the
> dependencies of TupletBracket/TupletNumber.
> Admittedly my own code is a brute-force override. Something wrong
> there or with the recent changes?

I strongly doubt this.  The changes I made to any bracket code this
touches are purely organizational.

On Mon, Apr 10, 2017 at 6:20 AM, Thomas Morley <address@hidden> wrote:
> 2017-04-10 12:36 GMT+02:00 Thomas Morley <address@hidden>:
>> Hi all,
>>
>> with the code below I experienced some pretty strange behaviour.
>>
>> The visual output changes every few compilations, although I changed 
>> _nothing_!!
>> In average two times in 10 compilations.
>
>> Also, my code is not a minimal example, sorry for that, I keep trying
>> to reduce it.
>
>
> Here the best minimal I can come up with:
>
> \version "2.19.60"
>
> tst = {
>     \override TupletBracket.stencil =
>     #(lambda (grob)
>        (let* ((orig (ly:grob-original grob))
>               (siblings (if (ly:grob? orig) (ly:spanner-broken-into orig) 
> '()))
>               (tuplet-number (ly:grob-object grob 'tuplet-number)))
>          (if (or (and (pair? siblings)
>                       (equal? grob (car siblings)))
>                  (null? siblings))
>              (ly:grob-set-property! tuplet-number 'X-offset 0))
>          (ly:tuplet-bracket::print grob)))
>     }
>
> %%{
> \new Staff { \tst \tuplet 1/1 { \repeat unfold 30 c'1 } }
> %}
> %%{
> \new Staff { \tst \tuplet 1/1 { c'1 c'1 c' c' c' } }
> %}
>
>

I notice the same variability with 2.19.56 and 2.18.2.  I'll see if I
can figure out more.

Best,
David