1. Type "word loadp" in the first box.
  2. When the suggestion popup appears, click in the second box.

This test triggers a codepath when we are trying to determine a range around the new correction word. We were remembering the location for the new word by creating a Range from the beginning of the document to the beginning of the new word. However, since the word is inside a shadow root, this Range would collapse and be meaningless. Further processing using the range would trigger ASSERTs and crash.

The test is successful if there is no crash.