how properly use recursive

[sineptic]

When i run my parser(application). There is this error

thread 'main' panicked at /home/sineptic/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:197:21:
setting stack permissions failed with: Cannot allocate memory (os error 12)
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

and it freezes.

When I try to RUST_BACKTRACE=1 it run smth but, and print only memory allocation of {different count} bytes failed and then run, but don't print.

I can build without problem.

[wackbyte]

This may mean that your parser is trying to infinitely recurse (stacker allocates more memory for the stack for deep recursion), can you provide the code for it?

[zesterer]

Yes, I agree. This looks like left recursion.

[sineptic]

I implement #653 and write this:

// ...
recursive(|x| {
    x.then_with(move |ctx: Context| {
        take_until(just::<_, _, Simple<char>>('`').repeated().at_least(1)).map(
            move |(chars, ticks)| match ticks.len() {
                n if n == backticks => Context::Ok(
                    [ctx.clone().into_intermediate_state().unwrap(), chars]
                        .concat(),
                    ticks,
                ),
                _ => Context::IntermediateState(
                    [
                        ctx.clone().into_intermediate_state().unwrap(),
                        chars,
                        ticks,
                    ]
                    .concat(),
                ),
            },
        )
    })
})
.map(|x| match x {
    Context::Ok(a, b) => (a, b),
    Context::IntermediateState(_) => unreachable!(),
})
// ...

And have Infinite recursion. How can I avoid this?

[zesterer]

I presume that you're using 0.9.

I don't see anything here that would result in infinite recursion (to be clear, do you mean infinite recursion or infinite iteration?) by itself, the problem must be elsewhere.

[Zij-IT]

@sineptic Have you been able to fix this, or are you able to share more of the code that is producing the error? Otherwise this issue can't move forward.

[sineptic]

Ohhh, I don't remember what I do to make it works, but this issue is irrelevant.