[Octave-bug-tracker] [bug #55226] building doc figures in .png format occasionally fails with error in getframe: unable to retrieve figure pixels

[Mike Miller]

Update of bug #55226 (project octave):

                  Status:                    None => Confirmed              

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Follow-up Comment #5:

Thank you!

I've also tested the following now:


$ for i in $(seq 1 100); do ./run-octave -qfH --eval 'hf = figure ("visible",
"off"); d = getframe (hf);'; done
error: getframe: unable to retrieve figure pixels
error: getframe: unable to retrieve figure pixels
$ for i in $(seq 1 100); do ./run-octave -qfH --eval 'pause (1); hf = figure
("visible", "off"); d = getframe (hf);'; done
error: getframe: unable to retrieve figure pixels
error: getframe: unable to retrieve figure pixels
error: getframe: unable to retrieve figure pixels
$ for i in $(seq 1 100); do ./run-octave -qfH --eval 'pause (3); hf = figure
("visible", "off"); d = getframe (hf);'; done


I get the same 2-3% failure rate with the first two as with my other tests.
But with a three second pause before doing anything each time Octave starts, I
get zero failures. This again seems to tie it to the elapsed time between
Octave starting and the call to getframe.

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