Not all ticked checkboxes are displayed in Acrobat Reader

[bogdanmaris]

Affected versions

• Latest Nightly 82.0a1

Affected platforms

• Ubuntu 18.04 64bit
• MacOS 10.15
• Windows 10 64bit

Steps to reproduce

1. Open the following https://www.nta.go.jp/taxes/tetsuzuki/shinsei/annai/joyaku/annai/pdf2/250.pdf
2. Scroll down to Indirect Ownership column inside the table from 6 and tick all checkboxes.
3. Save the pdf by download button, save as or open with
4. Open the saved pdf in Acrobat Reader.

Expected result

• Checkboxes are ticked when opening the PDF in Acrobat.

Actual result

• Some checkboxes are ticked, some checkboxes are empty, some can be edited/saved some not, some can't be edited anymore.

Regression range

• Not a regression since this did not work before as well.

Suggested severity

• I my opinion this should have the S2 severity since this is data loss related, not sure how many pdfs are affected though.

[calixteman]

This file is encrypted and the resulting string after encryption may contain some \r and according to the spec (7.3.4.2), this char is interpreted like a \n which avoids to decrypt the string.
Few lines after in the specs, it is written that there is no need to escape such char...
I tested the fix with Acrobat on mac and it's ok.