[Webkit-unassigned] [Bug 272199] New: Web Inspector: JavaScript breakpoint location is sometimes incorrect when inspector first shows up

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=272199

            Bug ID: 272199
           Summary: Web Inspector: JavaScript breakpoint location is
                    sometimes incorrect when inspector first shows up
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: qianlangchen at apple.com
                CC: inspector-bugzilla-changes at group.apple.com

Created attachment 470762

  --> https://bugs.webkit.org/attachment.cgi?id=470762&action=review

Video demo: Breakpoint location is incorrect unless I click on the breakpoint

If you set a breakpoint in some file at line L and column C, sometimes when that breakpoint first shows up in the source side bar on the left, the source location is displayed as 1:(global C ignoring new lines) instead of L:C.

To reproduce (this is only one instance that the issue may reproduce, but it can happen on any website and any source file):
   1. Go to https://search.brave.com
   2. Open inspector's Sources tab
   3. Make a breakpoint in the 0.DS3i2RRo.js file at line 5
   4. Try reloading the page with the inspector open, navigating to another page and go back, reopening the inspector, and/or all of the above, to make the bug show up
      - Due to https://bugs.webkit.org/show_bug.cgi?id=272098 sometimes the breakpoint just doesn't show up in the sidebar. Change the file filter from "By Type" or "By Path" to the other one if it doesn't show up
      - When the bug happens, the breakpoint's location shows up as some 1:1507 instead of 22:9

See video demo. As you can see, the bug doesn't always happen.

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