Refreshing was the key. Just typing it in does nothing, but refreshing or opening a saved document from your documents in docs with the text in it already leads to the crash.
Does not work for me in Google Docs, no matter if copied, or reloaded, refreshed etc. Perhaps they fixed it already.
on my side it didn't trigger the crash right away but if you refresh the page, a popup with "Something went wrong" will show up