error[E0080]: evaluation of constant value failed
  --> $DIR/ctfe-tail-call-panic.rs:9:5
   |
LL |     panic!()
   |     ^^^^^^^^ the evaluated program panicked at 'explicit panic', $DIR/ctfe-tail-call-panic.rs:9:5
   |
note: inside `g`
  --> $DIR/ctfe-tail-call-panic.rs:9:5
   |
LL |     panic!()
   |     ^^^^^^^^
note: inside `_`
  --> $DIR/ctfe-tail-call-panic.rs:16:15
   |
LL | const _: () = f();
   |               ^^^
   = note: this error originates in the macro `$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: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0080`.