Parser does not accept incorrect HTML tag with excessive quotes

[wenbinke]

See comment:2 for TC. Note that this HTML is not fixed by Firefox nor Chrome when we pass content through fixBin.

[Piotrek Koszuliński]

First of all, the HTML is invalid. There's an excessive quote after frameborder.

This was causing editor crash on Chrome and this issue is already fixed on ​master (#11754).

Regarding the encoding - that's also caused by the invalid HTML. We'll discuss whether we want to fix editor's parser or whether we'll mark this as "won't fix", because that's not a bug in CKEditor.

[Piotrek Koszuliński]

The TC to test parser:

var frag = CKEDITOR.htmlParser.fragment.fromHtml( '<iframe src="x" frameborder="0" " width=" 560"></iframe></p>' );

// Expected - element.
// Actual - text.
frag.children[ 0 ];

[Piotrek Koszuliński]

We confirm this issue, but we're not planning to work on it (at least not now). Issue is caused by creating incorrect HTML in source mode and CKEditor does not have to accept every broken thing.