window[0] is throwing an SyntaxError

[pshaughn]

WPT xhr/open-url-multi-window-* and xhr/open-url-about-blank-window try to find an iframe as self[0], where self is window, and throw "The string did not match the expected pattern." which is defined in script/dom/domexception.rs as the SyntaxError message.

[jdm]

This is caused by the missing indexed getter:

servo/components/script/dom/webidls/Window.webidl

Line 45 in 69c7595

//getter WindowProxy (unsigned long index);

[jdm]

That being said, the spec doesn't include an indexed getter on the Window interface, and instead includes the GetOwnProperty spec text for WindowProxy: https://html.spec.whatwg.org/multipage/window-object.html#windowproxy-getownproperty

[pshaughn]

I am mistaken here; the window[0] part is getting /something/ back, and then something else goes wrong later in the same line.