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#### Note: this error code is no longer emitted by the compiler.
A private trait was used on a public type parameter bound.
Previously erroneous code examples:
```
trait Foo {
fn dummy(&self) { }
}
pub trait Bar : Foo {} // error: private trait in public interface
pub struct Bar2<T: Foo>(pub T); // same error
pub fn foo<T: Foo> (t: T) {} // same error
fn main() {}
```
To solve this error, please ensure that the trait is also public. The trait
can be made inaccessible if necessary by placing it into a private inner
module, but it still has to be marked with `pub`. Example:
```
pub trait Foo { // we set the Foo trait public
fn dummy(&self) { }
}
pub trait Bar : Foo {} // ok!
pub struct Bar2<T: Foo>(pub T); // ok!
pub fn foo<T: Foo> (t: T) {} // ok!
fn main() {}
```
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