error[E0522]: definition of an unknown language item: `dummy_lang_item_1` --> $DIR/assoc-lang-items.rs:4:5 | LL | #[lang = "dummy_lang_item_1"] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ definition of unknown language item `dummy_lang_item_1` error[E0522]: definition of an unknown language item: `dummy_lang_item_2` --> $DIR/assoc-lang-items.rs:7:5 | LL | #[lang = "dummy_lang_item_2"] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ definition of unknown language item `dummy_lang_item_2` error[E0522]: definition of an unknown language item: `dummy_lang_item_3` --> $DIR/assoc-lang-items.rs:10:5 | LL | #[lang = "dummy_lang_item_3"] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ definition of unknown language item `dummy_lang_item_3` error[E0522]: definition of an unknown language item: `dummy_lang_item_4` --> $DIR/assoc-lang-items.rs:17:5 | LL | #[lang = "dummy_lang_item_4"] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ definition of unknown language item `dummy_lang_item_4` error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0522`.