How to solve Anchor error: error[E0425]: cannot find function `is` in this scope?

Question

Using anchor version 0.26.0. Steps I took:

1. anchor init test && cd test
2. anchor build

Result:

error[E0425]: cannot find function `is` in this scope

I did not make any changes to anything generated by anchor build. This is the default code:

use anchor_lang::prelude::*;

declare_id!("Fg6PaFpoGXkYsidMpWTK6W2BeZ7FEfcYkg476zPFsLnS");

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

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

#[derive(Accounts)]
pub struct Initialize {}

This is the default Cargo.toml file:

[package]
name = "test"
version = "0.1.0"
description = "Created with Anchor"
edition = "2021"

[lib]
crate-type = ["cdylib", "lib"]
name = "test"

[features]
no-entrypoint = []
no-idl = []
no-log-ix-name = []
cpi = ["no-entrypoint"]
default = []

[dependencies]
anchor-lang = "0.26.0"

I get no errors If I switch to version 0.24.2 and repeat the steps above, but I want to use 0.26.0. How can I solve the error above?

Some additional info:

• OS: macOS Ventura 13.1
• rustc version: 1.66.0

Answer 1

Looks like the error was due to an old version of solana that I installed a while ago.

The error disappeared after I updated my solana version from 1.9.28 to 1.14.13.