E1037

循环标签名称从未被使用。

错误示例

fn read() -> BytesView {
  ...
}

fn main {
  let mut bytes = []
  read~: loop read() {
    [] => break
    bs => {
      bytes = [..bytes, ..bs]
      continue read()
    }
  }
}

建议

移除未使用的循环标签。

fn main {
  let mut bytes = []
  loop {
    let bs = read()
    if bs == [] {
      break
    }
    bytes = [..bytes, ..bs]
  }
}