error[E0080]: evaluation of constant value failed --> $DIR/issue-81899.rs:11:5 | LL | const _CONST: &[u8] = &f(&[], |_| {}); | -------------- inside `_CONST` at $DIR/issue-81899.rs:4:24 ... LL | panic!() | ^^^^^^^^ | | | the evaluated program panicked at 'explicit panic', $DIR/issue-81899.rs:11:5 | inside `f::<[closure@$DIR/issue-81899.rs:4:31: 4:34]>` at $SRC_DIR/std/src/panic.rs:LL:COL | = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info) error[E0080]: evaluation of constant value failed --> $DIR/issue-81899.rs:4:23 | LL | const _CONST: &[u8] = &f(&[], |_| {}); | ^^^^^^^^^^^^^^^ referenced constant has errors error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0080`.