1 error: argument to `panic!()` in a const context must have type `&str`
2 --> $DIR/issue-66693-panic-in-array-len.rs:8:20
4 LL | let _ = [0i32; panic!(2f32)];
7 = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
9 error[E0080]: evaluation of constant value failed
10 --> $DIR/issue-66693-panic-in-array-len.rs:12:21
12 LL | let _ = [false; panic!()];
13 | ^^^^^^^^ the evaluated program panicked at 'explicit panic', $DIR/issue-66693-panic-in-array-len.rs:12:21
15 = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
17 error: aborting due to 2 previous errors
19 For more information about this error, try `rustc --explain E0080`.