That's actually the same as Java, with its "checked exceptions" (aka listed in function signatures), and the RunTimeException hierachy which don't have to be listed.

In Java common errors and exceptions, like file I/O errors, have to be declared on each function signature, except everything under the RunTimeException hierachy is exempt from this requirment. In the language, RunTimeExceptions these are the messy errors like NullPointerException and ArithmeticException.

In practice, people do subclass program-specific exceptions under RunTimeException in Java, as well as wrapping existing exceptions inside a RunTimeException, for the sole purpose of not having to add them to function signatures all over the place.