[Webkit-unassigned] [Bug 180940] Blank page except for inner iframes because pending stylesheets cause style.isNotFinal() to be true

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=180940

--- Comment #12 from Justin Ridgewell <jridgewell at google.com> ---
Woo, after a few hours, we've narrowed it down to the cause. See https://github.com/jridgewell/webkit-h2-style-blank-page for a full reproduction.

1. There must be a stylesheet that has an @import
2. The inner imported stylesheet must take a X milliseconds
3. Clone the <link> for the original stylesheet, replace the original with the clone.
  - This must happen before X milliseconds is up

AMP has some clever hack for font-loading using such a technique. But, it bit us in the end. AMP will be disabling it, but this still leaves a bug in Safari.

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