Audit required: Function call in default() that returns Self RS-A1008

[philipjonsen]

Description
The default() function in the Default trait is used to create a default instance of the type. While implementing this, if a function call returns the same type, it could possibly create an infinite loop by calling default() itself.

Consider revisiting this implementation.

Bad practice;
`struct A(i32);

impl A {
fn new() -> Self {
Self::default()
}
}

impl Default for A {
fn default() -> Self {
// This call will create an infinite loop
Self::new()
}
}
´

Found call returning Self in default()
https://github.com/nitro/blob/master/arbitrator/prover/src/programs/counter.rs#L40-L42