soroban-cli: Cannot seem to pass None via the CLI

[kalepail]

What version are you using?

soroban 0.3.3 (dc87a2947e8bfbbea56cd3762795b527812d2d01)
soroban-env 0.0.10 (c14805161b54ba272108ba0503057683f2a688a2)
soroban-env interface version 26
stellar-xdr 0.0.9 (1309e3de46fcb01743f818831de3a9ac4a5b1ab6)
xdr next (026c9cd074bdb28ddde8ee52f2a4502d9e518a09)

What did you do?

Tried to call a None argument via the CLI in several different ways

--arg '{"static":"void"}'
--arg 'null'
--arg null

What did you expect to see?

Success

What did you see instead?

error: parsing argument {"static":"void"}: parse error: value is not parseable to Option(ScSpecTypeOption { value_type: AccountId })

error: HostError
Value: Status(HostValueError(UnknownError))

Debug events (newest first):
   0: "Status(HostValueError(UnknownError))"

Backtrace (newest first):
   0: backtrace::capture::Backtrace::new_unresolved
   1: soroban_env_host::host::err_helper::<impl soroban_env_host::host::Host>::err
   2: soroban_env_host::host::Host::to_host_val
   3: <core::iter::adapters::map::Map<I,F> as core::iter::traits::iterator::Iterator>::try_fold
   4: <alloc::vec::Vec<T> as alloc::vec::spec_from_iter::SpecFromIter<T,I>>::from_iter
   5: core::iter::adapters::try_process
   6: soroban_env_host::host::Host::invoke_function
   7: soroban::invoke::Cmd::run_in_sandbox
   8: soroban::run::{{closure}}
   9: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
  10: tokio::runtime::park::CachedParkThread::block_on
  11: tokio::runtime::scheduler::multi_thread::MultiThread::block_on
  12: soroban::main

Contract code:

#![no_std]

use soroban_sdk::{contractimpl, Env, AccountId, Address};

pub struct TestContract;

#[contractimpl]
impl TestContract {
    pub fn set_wo(env: Env) {
        let to: Option<AccountId> = None;
        let source_account: Address;

        if to.is_none() {
            source_account = env.invoker();
        } else {
            source_account = Address::Account(to.unwrap());
        }

        env.storage().set(env.invoker(), source_account);
    }
    pub fn set_w(env: Env, to: Option<AccountId>) {
        let source_account: Address;

        if to.is_none() {
            source_account = env.invoker();
        } else {
            source_account = Address::Account(to.unwrap());
        }

        env.storage().set(env.invoker(), source_account);
    }
}

[paulbellamy]

I'd expect we need a strval converter for null -> Option::None to parse it in a way the host will accept.

[paulbellamy]

Also see: https://discord.com/channels/897514728459468821/1037066367326752818/threads/1037133766726000760

[kalepail]

And: https://discord.com/channels/897514728459468821/1058220441535271013