Method ensure_valid_utf8

crates/vm/src/builtins/str.rs:492–509

(&self, vm: &VirtualMachine)

    }

    pub(crate) fn ensure_valid_utf8(&self, vm: &VirtualMachine) -> PyResult<()> {
        if self.is_utf8() {
            Ok(())
        } else {
            let start = self
                .as_wtf8()
                .code_points()
                .position(|c| c.to_char().is_none())
                .unwrap();
            Err(vm.new_unicode_encode_error_real(
                identifier!(vm, utf_8).to_owned(),
                vm.ctx.new_str(self.data.clone()),
                start,
                start + 1,
                vm.ctx.new_str("surrogates not allowed"),
            ))
        }
    }

    pub fn to_string_lossy(&self) -> Cow<'_, str> {
        self.to_str()