[tetrazine]

There’s probably nothing to this, but when I try to screenshot the pdf (https://ia802805.us.archive.org/7/items/comp3321/comp3321.pd...) on iOS Safari, my phone locks up for a moment with a black screen and spinner and then I have to unlock the phone. Doesn’t happen on other PDFs on archive.org or after I’ve saved it to iBooks. Can anyone replicate? Is this perhaps the result of some byzantine configuration state in the PDF spec that Apple has chosen to implement or that their implementation is choking on?

[gruez]

>my phone locks up for a moment with a black screen and spinner and then I have to unlock the phone

AFAIK that happens when springboard crashes. Maybe there's a 0day exploit in there?

[simongr3dal]

When taking a screenshot in safari on iOS 13 it also tries to save a pdf of the entire page. If you open the little screenshot overlay in the corner there is an option to save as the full page as pdf instead of a screenshot.

Maybe the pdf is just too big to be re-rendered and saved as a new pdf and it crashes somehow.