PNG Metadata addition is sometimes creating invalid pngs

[stocksr]

Describe the bug
With versions of this plugin that add png meta data I am getting

     CypressError: `cy.task('cp-visual-regression-diff-compareImages')` failed with the following error:

> unrecognised content at end of stream

https://on.cypress.io/api/task
<snip>
    Error: unrecognised content at end of stream
        at module.exports.SyncReader.process (C:\src\Avius4\UI\node_modules\pngjs\lib\sync-reader.js:43:11)
        at module.exports (C:\src\Avius4\UI\node_modules\pngjs\lib\parser-sync.js:68:10)
        at Object.read (C:\src\Avius4\UI\node_modules\pngjs\lib\png-sync.js:7:10)
        at compareImagesTask (C:\src\Avius4\UI\node_modules\@frsource\cypress-plugin-visual-regression-diff\src\task.hook.ts:85:3

if I look at the PNG for that test I can see that it is invalid (the metadata tEXt block is after the IEND block )

To Reproduce

• Update to a current version of this plugin (3.1.5 in this case - but I have not tested other v3 versions)
• Run with pluginVisualRegressionUpdateImages=true to recreate all the images
• Run a normal test run
• see the error

Expected behavior
The generated images should be correct

Please complete the following information:

• OS and version: Windows 11
• Browser and version: electron(embedded)
• Cypress version 11.1

Additional context
I think but am not sure that this only happens on small images
here is an example images
example-pngs.zip

[FRSgit]

Hey @stocksr!

Thanks for the report. I'm looking into this issue, I've also created a bug report on bug tracker of meta-png (your can follow the ticket there as well) as I believe it's an issue with that library.
Let's try to investigate if further.

[FRSgit]

Hey @stocksr!

Just wanted to report that fix have been added to meta-png library, so I have updated this one and released under 3.1.6 - feel free to test it out!

[stocksr]

Many thanks - tested 3.1.6 and can confirm that all generated pngs are now valid

[FRSgit]

Okay, closing this one as fixed then 🙂