[Clipboard API] DataError vs NotAllowedError for malformed image data. Spec bug or wrong WPT?

[karlcow]

wpt/clipboard-apis/async-write-image-read-image.https.html

Lines 81 to 83 in 9cc1a33

	await promise_rejects_dom(t, 'DataError',
	navigator.clipboard.write([clipboardItemInput]));
	}, 'Verify write error on malformed data [image/png ClipboardItem]');

1. navigator.clipboard.write() is currently failing for malformed image data with NotAllowedError in Safari.
2. All the failures in the specification are NotAllowedError https://w3c.github.io/clipboard-apis/#dom-clipboard-write
3. WPT is expecting DataError https://github.com/web-platform-tests/wpt/blob/9cc1a33a76/clipboard-apis/async-write-image-read-image.https.html#L81-L83 which is passing on Chrome and Firefox

WPT issue or should the spec change?

[karlcow]

@garykac @saschanaz for recommendations.

[gsnedders]

Similar but different to #49301? Similar to that, the spec doesn't really seem to define this (it takes whatever the data is and sets it to that value, regardless of validity).

[karlcow]

ha good point, I had fogotten about this. Thanks @gsnedders