#### Note: this error code is no longer emitted by the compiler.

This error code was replaced by the more generic E0658.

A stability attribute has been used outside of the standard library.

Erroneous code example:

```compile_fail,E0658
#[stable(feature = "a", since = "b")] // invalid
#[unstable(feature = "b", issue = "none")] // invalid
fn foo(){}
```

These attributes are meant to only be used by the standard library and are
rejected in your own crates.
