[Bug]: Intermittent failure in the "must work properly when selecting undo by keyboard" integration test

[timvandermeij]

Attach (recommended) or Link to PDF file

N/A

Web browser and its version

Firefox 137.0.2

Operating system and its version

Arch Linux

PDF.js version

5.1.91

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

Yes

Is a browser extension

No

Steps to reproduce the problem

I have found that this integration test is one of the most common remaining intermittents now. The most recent occurrence is in #19869. From http://54.241.84.105:8877/ac1262cf22c74ac/output.txt:

1) Highlight Editor Undo deletion popup has the expected behaviour must work properly when selecting undo by keyboard
  Message:
�[31m    ProtocolError: script.callFunction timed out. Increase the 'protocolTimeout' setting in launch/connect calls for a higher timeout if needed.�[0m
  Stack:
        at <instance_members_initializer> (file:///home/ubuntu/pdfjs/botio-files-pdfjs/private/ac1262cf22c74ac/node_modules/puppeteer-core/lib/esm/puppeteer/common/CallbackRegistry.js:97:14)
        at new Callback (file:///home/ubuntu/pdfjs/botio-files-pdfjs/private/ac1262cf22c74ac/node_modules/puppeteer-core/lib/esm/puppeteer/common/CallbackRegistry.js:101:16)
        at CallbackRegistry.create (file:///home/ubuntu/pdfjs/botio-files-pdfjs/private/ac1262cf22c74ac/node_modules/puppeteer-core/lib/esm/puppeteer/common/CallbackRegistry.js:20:26)
        at BidiConnection.send (file:///home/ubuntu/pdfjs/botio-files-pdfjs/private/ac1262cf22c74ac/node_modules/puppeteer-core/lib/esm/puppeteer/bidi/Connection.js:51:32)
        at Session.send (file:///home/ubuntu/pdfjs/botio-files-pdfjs/private/ac1262cf22c74ac/node_modules/puppeteer-core/lib/esm/puppeteer/bidi/core/Session.js:134:42)
        at Session.<anonymous> (file:///home/ubuntu/pdfjs/botio-files-pdfjs/private/ac1262cf22c74ac/node_modules/puppeteer-core/lib/esm/puppeteer/util/decorators.js:101:27)
        at WindowRealm.callFunction (file:///home/ubuntu/pdfjs/botio-files-pdfjs/private/ac1262cf22c74ac/node_modules/puppeteer-core/lib/esm/puppeteer/bidi/core/Realm.js:92:51)
        at WindowRealm.<anonymous> (file:///home/ubuntu/pdfjs/botio-files-pdfjs/private/ac1262cf22c74ac/node_modules/puppeteer-core/lib/esm/puppeteer/util/decorators.js:101:27)
        at #evaluate (file:///home/ubuntu/pdfjs/botio-files-pdfjs/private/ac1262cf22c74ac/node_modules/puppeteer-core/lib/esm/puppeteer/bidi/Realm.js:134:42)
        at BidiFrameRealm.evaluateHandle (file:///home/ubuntu/pdfjs/botio-files-pdfjs/private/ac1262cf22c74ac/node_modules/puppeteer-core/lib/esm/puppeteer/bidi/Realm.js:101:36)

What is the expected behavior?

The integration test should pass consistently.

What went wrong?

The integration test fails intermittently.

Link to a viewer

No response

Additional context

No response

[timvandermeij]

I have debugged this test in #19870 since I wasn't able to make the test fail locally, and thanks to #19870 (comment) found out that the test hangs at https://github.com/mozilla/pdf.js/blob/master/test/integration/highlight_editor_spec.mjs#L2566. This shows that the undo button press didn't work as expected.