error: Closure called just once immediately after it was declared --> redundant_closure_call.rs:15:2 | 15 | i = closure(); | ^^^^^^^^^^^^^ | = note: `-D redundant-closure-call` implied by `-D warnings` error: Closure called just once immediately after it was declared --> redundant_closure_call.rs:18:2 | 18 | i = closure(3); | ^^^^^^^^^^^^^^ | = note: `-D redundant-closure-call` implied by `-D warnings` error: Try not to call a closure in the expression where it is declared. --> redundant_closure_call.rs:7:10 | 7 | let a = (|| 42)(); | ^^^^^^^^^ help: Try doing something like: `42` | = note: `-D redundant-closure-call` implied by `-D warnings` error: Try not to call a closure in the expression where it is declared. --> redundant_closure_call.rs:10:14 | 10 | let mut k = (|m| m+1)(i); | ^^^^^^^^^^^^ | = note: `-D redundant-closure-call` implied by `-D warnings` error: Try not to call a closure in the expression where it is declared. --> redundant_closure_call.rs:12:6 | 12 | k = (|a,b| a*b)(1,5); | ^^^^^^^^^^^^^^^^ | = note: `-D redundant-closure-call` implied by `-D warnings` error: aborting due to previous error(s) To learn more, run the command again with --verbose.