1636347 - Some glyphs in PDF garbled after a period of time

Status: RESOLVED DUPLICATE of bug 1607630

(Core :: Graphics: Canvas2D, defect)

Description

[Martin Thomson [:mt:]]

Attachment: garbled.png

Reading crypto papers as PDF, which contain a lot of glyphs that aren't commonplace. Sometimes when I switch back to the tab containing the paper, the glyphs are replaced with placeholders. In this case, it appears to be the BMP fallback, but I have seen a simple box replacement also (perhaps something like □, U+24A1).

This is PDF rendering, so the text is being drawn to a canvas.

This is very hard to reproduce, but I managed to get a screenshot eventually; see attached. Reloading corrects it, after which it is hard to get back.

Comment 1

[Martin Thomson [:mt:]]

Attachment: Expected

For reference, this is https://link.springer.com/content/pdf/10.1007%2F3-540-36492-7_7.pdf

I have seen this on other similar papers.

Comment 2

[Jeff Muizelaar [:jrmuizel]]

It might be worth filing this against pdf.js as well. It's not really clear who's fault it would be.

Comment 3

[Bob Owen (:bobowen)]

I'm pretty sure this will be a duplicate of bug 1607630.