1 error[E0658]: use of unstable library feature 'allocator_api'
2 --> $DIR/alloc-unstable-fail.rs:4:26
4 LL | let _boxed: Box<u32, _> = Box::new(10);
7 = note: see issue #32838 <https://github.com/rust-lang/rust/issues/32838> for more information
8 = help: add `#![feature(allocator_api)]` to the crate attributes to enable
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0658`.