InitSpace panic with const array size Option

[donkeizluv]

InitSpace account panics if there is an Option array field with const size

following snippet will panic on build:

const META_HASH_LEN: usize = 32;

#[account]
#[derive(InitSpace)]
pub struct Config {
    pub bump: u8,
    pub meta_hash: Option<[u8; META_HASH_LEN]>,
}

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: ParseIntError { kind: InvalidDigit }', lang/syn/src/idl/mod.rs:219:76
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[Aursen]

Thanks for the issue, I will fix it. I'm waiting this merge: #2555

Edit: It is not an issue of the InitSpace macro but it is from the idl parsing

[acheroncrypto]

Fixed in #2555.