[Webkit-unassigned] [Bug 191835] New: 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

            Bug ID: 191835
           Summary: Safari 12.0.1 Page freezes with spinning beachball
                    that seems related to javascript
           Product: WebKit
           Version: Safari 12
          Hardware: Macintosh
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: salex at mac.com

Working on a Rails 5.1 application in development mode. While I have a little javascript in the application it appears tied to rails-ujs or jquery_ujs library and not my code.

This is very intermittent and usually will show up on a Rails CRUD delete link, which calls a ujs 'Confirm' alert. The delete link will be unresponsive and a spinning beach ball will come on and off.

Thinking I had a javascript error I tried to open the Develop: show web inspector or console and the links will be greyed out. Can't get into web inspector

I can reload the page and the beach ball will go away but the web inspector links are still greyed out. Clicking on the delete link will bring the beach ball back.

Closing the Safari window and opening a new window will fix everything for maybe days until the intermittent bug shows up.

I have also seen this happen on viewing a page on stackoverflow.com, but don't know if web inspectors links are greyed out before I went to the site.

I have not tried Chrome and see if happens there, but will. That would point to rails-ujs problem,  I did switch back to jquery_ujs for a bit and think I still had the problem.

Have not found any posts with a web search that looks related. Would be glad to provide any additional information if I can get any suggestions on where to look or what to try.

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