[Webkit-unassigned] [Bug 234193] New: Page doesn't draw content if a <style> tag with a font @import is removed during the DOMContentLoaded event

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=234193

            Bug ID: 234193
           Summary: Page doesn't draw content if a <style> tag with a font
                    @import is removed during the DOMContentLoaded event
           Product: WebKit
           Version: Safari 15
          Hardware: Mac (Apple Silicon)
                OS: macOS 12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: neil at neiljhaveri.com

Created attachment 446861

  --> https://bugs.webkit.org/attachment.cgi?id=446861&action=review

Simplified test case

Page doesn't draw content if a <style> tag with a font @import is removed during the DOMContentLoaded event

STEPS TO REPRODUCE:
- Open the attached test.html file in Safari

RESULTS:
- Expect to see lines of text in sans-serif font
- Actual: Text isn't painted at all

NOTES:
- It takes a few seconds, but the page is scrollable
- Text can be selected and copied, even though it's not painted

CONFIGURATION
Safari 15.1 (17612.2.9.1.20)
macOS 12.0.1 (21A559)
MacBookPro18,1 (16" M1 Pro)

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