error[E0432]: unresolved import `core`
  --> $DIR/feature-gate-extern_absolute_paths.rs:11:5
   |
11 | use core::default; //~ ERROR unresolved import `core`
   |     ^^^^ Maybe a missing `extern crate core;`?

error[E0433]: failed to resolve. Maybe a missing `extern crate core;`?
  --> $DIR/feature-gate-extern_absolute_paths.rs:14:19
   |
14 |     let _: u8 = ::core::default::Default(); //~ ERROR failed to resolve
   |                   ^^^^ Maybe a missing `extern crate core;`?

error: aborting due to 2 previous errors