For error handling, I'd encourage you to look at error-chain. It makes it pretty simple to propagate all your errors with try!/? so long as all your functions return a Result. And the quick_main macro can handle the panicking if you let it propagate all the way to main. Hopefully once the ? In main RFC gets released, quick_main won't even be necessary.
There's a couple of annoyances to it. The documentation is really sparse for something as integral as it aims to be. And there's a frustratingly large number of third-party crates that don't use standard error types and prevent you from calling chain_error to convert from their error types to yours.
But once you get the gist of it, a few lines of boilerplate gives you the ability to handle errors concisely and correctly throughout your program.
There's a couple of annoyances to it. The documentation is really sparse for something as integral as it aims to be. And there's a frustratingly large number of third-party crates that don't use standard error types and prevent you from calling chain_error to convert from their error types to yours.
But once you get the gist of it, a few lines of boilerplate gives you the ability to handle errors concisely and correctly throughout your program.