Getting double-frees from uplink-rust

[GodTamIt]

This is the code snippet to reproduce but I haven't been able to find exactly where it comes from.

The error but I can't quite reproduce it locally but it's happening in AWS's Lambda runtimes: free(): double free detected in tcache 2

Here's the code snippet:

pub fn create_public_access(
    root_access: &str,
    bucket_name: &str,
    prefix: &str,
) -> anyhow::Result<PublicAccess> {
    const REGISTER_ACCESS_OPTIONS: uplink::edge::config::OptionsRegisterAccess =
        uplink::edge::config::OptionsRegisterAccess { public: true };

    let root_grant = uplink::access::Grant::new(root_access)?;
    let share_prefix = uplink::access::SharePrefix::new(bucket_name, &prefix)?;

    // Users should only be able to view the short files but not list them.
    let mut permissions = uplink::access::Permission::read_only();
    permissions.allow_list = false;

    let grant = root_grant
        .share(&permissions, Some(vec![share_prefix]))
        .context("Failed to create sub-grant for short")?;

    let uplink_config = uplink::edge::Config::new(UPLINK_AUTH_SERVICE_ADDR)?;
    let gateway = uplink_config
        .register_gateway_access(&grant, Some(&REGISTER_ACCESS_OPTIONS))
        .context("Failed to register grant to gateway")?;

    Ok(PublicAccess {
        access_grant_serialized: grant.serialize().context("Failed to serialize grant")?,
        gateway_access_key_id: gateway.access_key_id,
    })
}

cc @ifraixedes this is currently breaking a production service.

[ifraixedes]

I'm sorry, but I won't have time today to check.
I'll try to take a look as soon as I get some spare time.