S+fail+to doのto doが名詞的用法ではない、即ち目的語ではない「証拠」が英英辞書の中に書かれているケースです。
Oxford Dictionary
- [intransitive] to not do something →fail to do something
- People failed to recognize her talent.
- His article fails to mention that he actually supported this change.
- If you fail to comply, you can be fined. (comply=to obey a rule, an order, etc.)
- The government has failed to provide the needed resources.
- Such comments never failed to annoy him.
Cambridge Dictionary
B2 [ I ]
[ + to infinitive ] She failed to reach the Wimbledon Final this year.