error[E0308]: mismatched types --> $DIR/alloc-error-handler-bad-signature-2.rs:10:1 | LL | #[alloc_error_handler] | ---------------------- in this procedural macro expansion LL | // fn oom( LL | || info: Layout, LL | || ) { | ||_- arguments to this function are incorrect LL | | loop {} LL | | } | |__^ expected `Layout`, found `core::alloc::Layout` | = note: `core::alloc::Layout` and `Layout` have similar names, but are actually distinct types note: `core::alloc::Layout` is defined in crate `core` --> $SRC_DIR/core/src/alloc/layout.rs:LL:COL note: `Layout` is defined in the current crate --> $DIR/alloc-error-handler-bad-signature-2.rs:7:1 | LL | struct Layout; | ^^^^^^^^^^^^^ note: function defined here --> $DIR/alloc-error-handler-bad-signature-2.rs:10:4 | LL | fn oom( | ^^^ LL | info: Layout, | ------------ = note: this error originates in the attribute macro `alloc_error_handler` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0308]: mismatched types --> $DIR/alloc-error-handler-bad-signature-2.rs:10:1 | LL | #[alloc_error_handler] | ---------------------- in this procedural macro expansion LL | // fn oom( LL | || info: Layout, LL | || ) { | ||_^ expected `!`, found `()` LL | | loop {} LL | | } | |__- expected `!` because of return type | = note: expected type `!` found unit type `()` = note: this error originates in the attribute macro `alloc_error_handler` (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0308`.