1 An unknown external lang item was used.
3 Erroneous code example:
6 #![feature(lang_items)]
9 #[lang = "cake"] // error: unknown external lang item: `cake`
14 A list of available external lang items is available in
15 `src/librustc_middle/middle/weak_lang_items.rs`. Example:
18 #![feature(lang_items)]
21 #[lang = "panic_impl"] // ok!