error[E0432]: unresolved import `alloc` --> $DIR/not-allowed.rs:5:5 | LL | use alloc; | ^^^^^ no external crate `alloc` | help: consider importing one of these items instead | LL | use core::alloc; | ~~~~~~~~~~~ LL | use std::alloc; | ~~~~~~~~~~ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0432`.