chromium/third_party/blink/web_tests/dom/mutation-event-tests/editing/execCommand/5120591-expected.txt

CONSOLE WARNING: Listener added for a 'DOMSubtreeModified' mutation event. This event type is deprecated, and will be removed from this browser VERY soon. Usage of this event listener will cause performance issues today, and represents a large risk of imminent site breakage. Consider using MutationObserver instead. See https://chromestatus.com/feature/5083947249172480 for more information.
Tests for a crash when creating a link inside a region with a subtree modified event listener.

This should be a link.
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