error[E0433]: failed to resolve: use of undeclared type `Vec` --> $DIR/no_implicit_prelude.rs:11:9 | LL | fn f() { ::bar::m!(); } | ----------- in this macro invocation ... LL | Vec::new(); | ^^^ use of undeclared type `Vec` | = note: this error originates in the macro `::bar::m` (in Nightly builds, run with -Z macro-backtrace for more info) help: consider importing this struct | LL | use std::vec::Vec; | error[E0599]: no method named `clone` found for unit type `()` in the current scope --> $DIR/no_implicit_prelude.rs:12:12 | LL | fn f() { ::bar::m!(); } | ----------- in this macro invocation ... LL | ().clone() | ^^^^^ method not found in `()` | = help: items from traits can only be used if the trait is in scope = note: this error originates in the macro `::bar::m` (in Nightly builds, run with -Z macro-backtrace for more info) help: the following trait is implemented but not in scope; perhaps add a `use` for it: | LL | use std::clone::Clone; | error: aborting due to 2 previous errors Some errors have detailed explanations: E0433, E0599. For more information about an error, try `rustc --explain E0433`.