error[E0080]: evaluation of constant value failed --> $DIR/issue-88434-minimal-example.rs:9:5 | LL | const _CONST: &() = &f(&|_| {}); | ---------- inside `_CONST` at $DIR/issue-88434-minimal-example.rs:3:22 ... LL | panic!() | ^^^^^^^^ | | | the evaluated program panicked at 'explicit panic', $DIR/issue-88434-minimal-example.rs:9:5 | inside `f::<[closure@$DIR/issue-88434-minimal-example.rs:3:25: 3:31]>` at $SRC_DIR/std/src/panic.rs:LL:COL | = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info) error: aborting due to previous error For more information about this error, try `rustc --explain E0080`.