Re: segfaults building documentation when machine under load

On Tue, May 19, 2020 at 4:02 PM John W. Eaton <[email protected]> wrote:

> On 5/19/20 3:26 PM, Dmitri A. Sergatskov wrote:
>
> >     Should we switch to bug-tracker?
> >     I was able to get a crash when I bumped the jobs to 200.
> >     bt is attached. The relevant part seems to be:
>
> If I use a large number of jobs, I see
>
>    error: imwrite: invalid empty image
>    error: called from
>        __imwrite__ at line 40 column 5
>        imwrite at line 125 column 5
>        print at line 755 column 13
>        interpimages at line 72 column 5
>
> but no segfaults.
>
> It does look like a threading issue.
>

I used a simplified test by Andreas:

parallel -N0 -q octave --norc --silent --no-history --eval 'figure (1,
"visible",
"off");' ::: {1..200}


>
> jwe
>

Dmitri.