These are a memory leak if we use e.g. --input-fmt-options decode_md. Some tools still leak if they get errors and return early, but this is true in many other ways too (for example calmd doesn't destroy the thread pool if it gets an error closing fpout; one among many). However I focused on removing memory leaks on successful execution (albeit harmless due to immediately exiting anyway) as it's more likely to trip up testing.