Non account struct parsed as account in IDL

[RuvendeGroote]

Hi,

It might be a fringe case but if you have a struct with the account annotation and also a struct deriving AnchorSerialize, AnchorDeserialize bearing the same name, both struct definitions will end up as accounts in the IDL

use anchor_lang::prelude::*;

declare_id!("Fg6PaFpoGXkYsidMpWTK6W2BeZ7FEfcYkg476zPFsLnS");

#[program]
pub mod bug {
    use super::*;

    pub fn initialize(_: Context<Initialize>) -> Result<()> {
        Ok(())
    }
}

#[derive(Accounts)]
pub struct Initialize<'info> {
    pub something: Account<'info, Something>,
}

#[account]
pub struct Something {
    pub first: u64,
}

mod other {
    use anchor_lang::prelude::*;

    #[derive(AnchorDeserialize, AnchorSerialize)]
    pub struct Something {
        pub second: u64,
    }
}

running anchor build (using anchor 0.27.0) will result in following idl:

{
  "version": "0.1.0",
  "name": "bug",
  "instructions": [],
  "accounts": [
    {
      "name": "Something",
      "type": {
        "kind": "struct",
        "fields": [
          {
            "name": "second",
            "type": "u64"
          }
        ]
      }
    },
    {
      "name": "Something",
      "type": {
        "kind": "struct",
        "fields": [
          {
            "name": "first",
            "type": "u64"
          }
        ]
      }
    }
  ]
}

[acheroncrypto]

Fixed in #2824.