|  | error[E0658]: use of unstable library feature `unstable_test_feature` | 
|  | --> $DIR/stable-in-unstable.rs:16:9 | 
|  | | | 
|  | LL |     use stable_in_unstable_core::new_unstable_module; | 
|  | |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | | | 
|  | = note: see issue #1 <https://github.com/rust-lang/rust/issues/1> for more information | 
|  | = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable | 
|  | = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | 
|  |  | 
|  | error[E0658]: use of unstable library feature `unstable_test_feature` | 
|  | --> $DIR/stable-in-unstable.rs:17:9 | 
|  | | | 
|  | LL |     use stable_in_unstable_core::new_unstable_module::OldTrait; | 
|  | |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | | | 
|  | = note: see issue #1 <https://github.com/rust-lang/rust/issues/1> for more information | 
|  | = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable | 
|  | = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | 
|  |  | 
|  | error[E0658]: use of unstable library feature `unstable_test_feature` | 
|  | --> $DIR/stable-in-unstable.rs:29:9 | 
|  | | | 
|  | LL |     use stable_in_unstable_core::new_unstable_module::OldTrait; | 
|  | |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | | | 
|  | = note: see issue #1 <https://github.com/rust-lang/rust/issues/1> for more information | 
|  | = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable | 
|  | = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | 
|  |  | 
|  | error[E0658]: use of unstable library feature `unstable_test_feature` | 
|  | --> $DIR/stable-in-unstable.rs:39:10 | 
|  | | | 
|  | LL |     impl stable_in_unstable_core::new_unstable_module::OldTrait for LocalType {} | 
|  | |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | | | 
|  | = note: see issue #1 <https://github.com/rust-lang/rust/issues/1> for more information | 
|  | = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable | 
|  | = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | 
|  |  | 
|  | error[E0658]: use of unstable library feature `unstable_test_feature` | 
|  | --> $DIR/stable-in-unstable.rs:49:56 | 
|  | | | 
|  | LL |     use stable_in_unstable_core::new_unstable_module::{OldTrait}; | 
|  | |                                                        ^^^^^^^^ | 
|  | | | 
|  | = note: see issue #1 <https://github.com/rust-lang/rust/issues/1> for more information | 
|  | = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable | 
|  | = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | 
|  |  | 
|  | error[E0658]: use of unstable library feature `unstable_test_feature` | 
|  | --> $DIR/stable-in-unstable.rs:53:9 | 
|  | | | 
|  | LL |     use stable_in_unstable_core::new_unstable_module::*; | 
|  | |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
|  | | | 
|  | = note: see issue #1 <https://github.com/rust-lang/rust/issues/1> for more information | 
|  | = help: add `#![feature(unstable_test_feature)]` to the crate attributes to enable | 
|  | = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | 
|  |  | 
|  | error: aborting due to 6 previous errors | 
|  |  | 
|  | For more information about this error, try `rustc --explain E0658`. |