error: trailing semicolon in macro used in expression position --> $DIR/issue-84195-lint-anon-const.rs:8:14 | LL | () => { 0; }; | ^ ... LL | let val: [u8; len!()] = []; | ------ in this macro invocation | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #79813 note: the lint level is defined here --> $DIR/issue-84195-lint-anon-const.rs:5:9 | LL | #![deny(semicolon_in_expressions_from_macros)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ = note: this error originates in the macro `len` (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to previous error