[Webkit-unassigned] [Bug 191835] Safari 12.0.1 Page freezes with spinning beachball that seems related to javascript

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=191835

--- Comment #10 from Steve Alex <salex at mac.com> ---
I've found a reproducible sequence, at least on my MacBook Air. I don't have another box running safari 12.0.1.  This does not even require my code.

1 Open a new Safari window.

2 Go to URL: https://www.w3schools.com/js/tryit.asp?filename=tryjs_confirm

3 Click on the 'Try it' button and click Ok in the dialog

4 Using a bookmark go to another site ( I went DrudgeReport, don't think it matters)

5 Using the back arrow go back to the previous page (w3schools)

6 Try clicking on 'Try it' button. On my system will will fail. (Develop 'Show Web Inspector' links grayed out etc)


If I try this sequence with Web Inspector open, it will work, but the w3schools site will report a js error

The source list for Content Security Policy directive 'script-src' contains an invalid source: ''strict-dynamic''. It will be ignored.

The same sequence using my demo site will fail with my test destroy link, now on home page.

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