Re: segfaults building documentation when machine under load

[Dmitri A. Sergatskov]

On Tue, May 19, 2020 at 4:02 PM John W. Eaton <address@hidden> 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.