See [this comment thread](https://github.com/canonical/craft-application/pull/20/files/88c186c8a772c0ad8f5a8cfeb8fe84d352729111#diff-e1faa3a7dda894734ce22e2d235c8e3a1fd7e0ad2ae234fff07ed0fe131af6d3). The modifications made to the YAML loader may be more than is needed with the latest pyyaml, but I'm not confident enough to say so. If the questioned `except` clause is needed, we should have a test for it that has it raise that error, as right now the loader fails with the same issue before it gets to the dict constructor.