wrong line dash pattern rendering behavior when dash array is empty

[ex37]

Link to PDF file here:
dash_array_example.pdf

Configuration:

• Web browser and its version: chrome 123 (not important)
• PDF.js version: 4.1.367

Steps to reproduce the problem:

1. open inside pdf.js viewer any pdf file which has an annotation with an empty array as a dash pattern

What is the expected behavior?
from PDF spec, page 218:

it's completely valid having empty dash array, and in Acrobat line is rendered with proper width:

What went wrong?
cause of the following line:

pdf.js/src/core/annotation.js

Line 1503 in 5adad89

this.width = 0; // Adobe behavior when the array is invalid.

annotation width is set to 0, when dash array is empty.

A solution could be changing the else if statement to smth like this:
else if (!Array.isArray(dashArray))

[timvandermeij]

Fixed by the PR above. Thank you for reporting this and providing a good analysis to reproduce the issue!

[ex37]

thanks for the quick fix