[Webkit-unassigned] [Bug 254238] New: Web Inspector: breakpoint on content modification is not persistent

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=254238

            Bug ID: 254238
           Summary: Web Inspector: breakpoint on content modification is
                    not persistent
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: karlcow at apple.com
                CC: inspector-bugzilla-changes at group.apple.com,
                    webkit-bug-importer at group.apple.com

1. with Safari Tech Preview 165
2. Go to https://www.pinterest.com/
3. Log in
4. Open Web Inspector
5. Go to the Elements tab
6. Find #homefeedGridFadeInTransitionContainer > div > div aka (<div style="width: 100%">…)
7. Control+click on this element
8. Select "Break on…", choose: "subtree modified" or/and "node removed"
9. Shift + reload

Expected:
Stop when the subtree is being modified. 

Actual:
Nothing happens, the page just reload, but the breakpoint was not effective


10. Check the Sources tab

Expected:
Breakpoint is visible

Actual:
Breakpoint is gone.


11. Close Web Inspector and Reopen Web Inspectore
12. Go to Sources tab, the breakpoint is visible again.

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