error[E0057]: this function takes 0 arguments but 1 argument was supplied --> $DIR/wrong_argument_ice-4.rs:2:5 | LL | (|| {})(|| { | _____^^^^^^^_- LL | | LL | | let b = 1; LL | | }); | | - | | | | |_____unexpected argument of type `{closure@$DIR/wrong_argument_ice-4.rs:2:13: 2:15}` | help: remove the extra argument | note: closure defined here --> $DIR/wrong_argument_ice-4.rs:2:6 | LL | (|| {})(|| { | ^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0057`.