Unless I'm misunderstanding you, [`std::process::exit`](https://doc.rust-lang.org/nightly/std/process/fn.exit.html) does what you want.
EDIT: to expand on this: a suggested workaround is to only call std::process::exit at the very end of the main function. But consider stuff like "env_logger::init". What about that? Ok, that doesn't use Drop and if it did you could put it into it's own scope I guess - so there are workarounds - but it in my opinion that gets pretty ugly. Comparing to c++, std::process::exit or panic! is like abort(), but what I want is a "return 1" from main.
panic! does return a non-zero exit code, but isn't really designed for good end-user output.
That most of my programs have some global (i.e. "for the runtime of the program") stuff that is setup at the beginning of main. And that some of that might want to Drop when the program exits, for example to delete a temporary directory. Now, if I want to return a non-zero exit code I can not do so while still getting all this global stuff destructed correctly (or use a workaround like having a wrapper-main).
> Calling `std::process:exit(1)` at the end of main is identical to `return 1`.
The thing is that it is actually not the same with respect to destructors -- the documentation explicitly calls that out. See also the C++ comparison in my other comment.