Function r_stop 

pub(crate) fn r_stop(msg: &str) -> !

Raise an R error via Rf_error (longjmp). Crate-internal only.

Survives at two guard sites where there is no SEXP slot to return through:

• crate::ffi_guard::guarded_ffi_call with GuardMode::CatchUnwind (worker thread panic conversion)
• crate::trait_abi::check_arity (pre-shim arity check)

User code should use panic!() (caught by the framework and converted to a rust_error R condition) or the structured condition macros error!() / warning!() / message!() / condition!().

Panics

Panics if the message contains null bytes.