- Added `$m = null; $m->method()` to a fixture test to force a fatal.
- Saw consistent deadlock, with `storage destroy` never exiting.
- Added `--trace` to the `storage destroy` command and made it use `phutil_passthru()` so I could see what was happening.
- Saw it hang on some arbitrary database.
- Conneced to MySQL, used `show full processlist;` to see what was wrong.
- Saw the `DROP DATABASE ...` command waiting for locks to release on the database, and other connections still open.
- Applied patch.
- Saw consistent success.
- Used `storage destroy --unittest-fixtures` to clean up extra databases.