Function panic_nounwind_fmt 

pub const fn panic_nounwind_fmt(
    fmt: Arguments<'_>,
    _force_no_backtrace: bool,
) -> !

🔬This is a nightly-only experimental API. (panic_internals)

This item is validated for IEC 61508 (SIL 2) and ISO 26262 (ASIL B).

Like panic_fmt, but for non-unwinding panics.

Has to be a separate function so that it can carry the rustc_nounwind attribute.