I don't think this will make reuse much worse even in a general programs, as long as there is a good division between expected errors (file not found) and unexpected (invalid operation code). In fact, there are a lot of ignorable errors in Unix which IMHO should have been raising a fatal signal instead, as this would substantially improve general software quality.
As an example: trying to close() invalid FD is a a non-fatal error which is very often ignored. But it is actually super dangerous, especially in multi-threaded apps: closing wrong fd will harmlessly fail most of the time, but 1% of time you'll close a logging socket or a database lock file or some unrelated IPC connection.. That's how you get unreliable software everyone hates.
As an example: trying to close() invalid FD is a a non-fatal error which is very often ignored. But it is actually super dangerous, especially in multi-threaded apps: closing wrong fd will harmlessly fail most of the time, but 1% of time you'll close a logging socket or a database lock file or some unrelated IPC connection.. That's how you get unreliable software everyone hates.