[Bug]: pdf form cannot be filled out

[cadeyrn]

Attach (recommended) or Link to PDF file

In the Firefox support, a user provided us with the following PDF file:
einr_scheck_inl3.pdf

It is not possible to fill in the form fields in this form. In other PDF applications (Adobe Acrobat Online, Apple Preview) and browsers (Chrome, Safari) it works.

Web browser and its version

Firefox 135 / 137 Nightly

Operating system and its version

macOS 15.3 / Windows 10

PDF.js version

PDF.js shipped with Firefox 135 / 137 Nightly

Is the bug present in the latest PDF.js version?

Yes

Is a browser extension

No

Steps to reproduce the problem

1. Open the PDF file
2. Try to fill out the form fields

What is the expected behavior?

You can fill out the form fields.

What went wrong?

Nothing happens.

Link to a viewer

No response

Additional context

No response

[Snuffleupagus]

PDF f34a9402cdaec21891650f265516ddb2 [1.4 DKB / -] (PDF.js: 5.0.164 [3f15e0c46]) viewer.mjs:13818:13

ReferenceError: tab_next is not defined
@resource://pdf.js/build/pdf.scripting.mjs line 3889 > eval:1:1
globalEval@resource://pdf.js/build/pdf.scripting.mjs:3889:41
_runActions@resource://pdf.js/build/pdf.scripting.mjs:809:14
runActions@resource://pdf.js/build/pdf.scripting.mjs:1616:23
dispatch@resource://pdf.js/build/pdf.scripting.mjs:1526:10
_dispatchEvent@resource://pdf.js/build/pdf.scripting.mjs:1829:27
initSandbox/<@resource://pdf.js/build/pdf.scripting.mjs:4041:22
viewer.mjs:6793:19

[calixteman]

It's because the tab_next function isn't defined in the pdf.
We shouldn't invalidate the keystroke when the action has thrown.