Nov 29 23:09:45.737 INFO checking lucke84/playing_around_with_rust against master#a49316ddc99d9d595193557fc899f6c52e4d9af9 for pr-56323 Nov 29 23:09:45.737 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-4/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56323/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +a49316ddc99d9d595193557fc899f6c52e4d9af9-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"` Nov 29 23:09:46.243 INFO [stdout] af47f7e98c8fd3fadb44661cea735452033ff48e4874a40cc59a4104db92ea50 Nov 29 23:09:46.250 INFO running `"docker" "start" "-a" "af47f7e98c8fd3fadb44661cea735452033ff48e4874a40cc59a4104db92ea50"` Nov 29 23:09:47.229 INFO [stderr] usermod: no changes Nov 29 23:09:47.328 INFO [stderr] Checking playing_around_with_rust v0.0.1 (/source) Nov 29 23:09:47.896 INFO [stderr] warning: unnecessary parentheses around assigned value Nov 29 23:09:47.896 INFO [stderr] --> src/main.rs:37:13 Nov 29 23:09:47.896 INFO [stderr] | Nov 29 23:09:47.896 INFO [stderr] 37 | let j = (i = 6); // the value of an assignment is an empty tuple: so j has the value (), not 6 Nov 29 23:09:47.896 INFO [stderr] | ^^^^^^^ help: remove these parentheses Nov 29 23:09:47.896 INFO [stderr] | Nov 29 23:09:47.896 INFO [stderr] = note: #[warn(unused_parens)] on by default Nov 29 23:09:47.896 INFO [stderr] Nov 29 23:09:47.964 INFO [stderr] warning: unreachable expression Nov 29 23:09:47.964 INFO [stderr] --> src/main.rs:137:5 Nov 29 23:09:47.964 INFO [stderr] | Nov 29 23:09:47.964 INFO [stderr] 137 | x // never executed Nov 29 23:09:47.964 INFO [stderr] | ^ Nov 29 23:09:47.964 INFO [stderr] | Nov 29 23:09:47.964 INFO [stderr] = note: #[warn(unreachable_code)] on by default Nov 29 23:09:47.964 INFO [stderr] Nov 29 23:09:47.969 INFO [stderr] warning: unused variable: `a` Nov 29 23:09:47.969 INFO [stderr] --> src/main.rs:7:9 Nov 29 23:09:47.969 INFO [stderr] | Nov 29 23:09:47.972 INFO [stderr] 7 | let a = 1; // type i32 is infered Nov 29 23:09:47.972 INFO [stderr] | ^ help: consider using `_a` instead Nov 29 23:09:47.972 INFO [stderr] | Nov 29 23:09:47.972 INFO [stderr] = note: #[warn(unused_variables)] on by default Nov 29 23:09:47.972 INFO [stderr] Nov 29 23:09:47.972 INFO [stderr] warning: unused variable: `b` Nov 29 23:09:47.972 INFO [stderr] --> src/main.rs:8:9 Nov 29 23:09:47.972 INFO [stderr] | Nov 29 23:09:47.972 INFO [stderr] 8 | let b: i32 = 2; // type i32 is explicitly declared Nov 29 23:09:47.972 INFO [stderr] | ^ help: consider using `_b` instead Nov 29 23:09:47.972 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `c` Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:10:10 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 10 | let (c, d) = (3, 4); // variable bindings of multiple vars at the same time Nov 29 23:09:47.973 INFO [stderr] | ^ help: consider using `_c` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `d` Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:10:13 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 10 | let (c, d) = (3, 4); // variable bindings of multiple vars at the same time Nov 29 23:09:47.973 INFO [stderr] | ^ help: consider using `_d` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `e` Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:12:9 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 12 | let e: i32; Nov 29 23:09:47.973 INFO [stderr] | ^ help: consider using `_e` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: variable `f` is assigned to, but never used Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:18:13 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 18 | let mut f = 5; // make variable mutable Nov 29 23:09:47.973 INFO [stderr] | ^ Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] = note: consider using `_f` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: value assigned to `f` is never read Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:19:5 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 19 | f = 6; // now I can assign a new value (of the same type!) to this variable Nov 29 23:09:47.973 INFO [stderr] | ^ Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] = note: #[warn(unused_assignments)] on by default Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `f` Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:20:9 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 20 | let f = "Look, I am text now"; // shadowing, and changing type! Nov 29 23:09:47.973 INFO [stderr] | ^ help: consider using `_f` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: value assigned to `i` is never read Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:36:13 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 36 | let mut i = 5; Nov 29 23:09:47.973 INFO [stderr] | ^ Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `j` Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:37:9 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 37 | let j = (i = 6); // the value of an assignment is an empty tuple: so j has the value (), not 6 Nov 29 23:09:47.973 INFO [stderr] | ^ help: consider using `_j` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `a_boolean` Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:59:9 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 59 | let a_boolean = true; // with inference Nov 29 23:09:47.973 INFO [stderr] | ^^^^^^^^^ help: consider using `_a_boolean` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `another_boolean` Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:60:9 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 60 | let another_boolean: bool = false; // without inference Nov 29 23:09:47.973 INFO [stderr] | ^^^^^^^^^^^^^^^ help: consider using `_another_boolean` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `this_is_a_char` Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:63:9 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 63 | let this_is_a_char = 'x'; // delimited by a single quote/tick Nov 29 23:09:47.973 INFO [stderr] | ^^^^^^^^^^^^^^ help: consider using `_this_is_a_char` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `two_hearts_char` Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:64:9 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 64 | let two_hearts_char = '💕'; // any unicode char (due to the fact that they are UTF-32, all chars are 4 bytes instead of just 1) Nov 29 23:09:47.973 INFO [stderr] | ^^^^^^^^^^^^^^^ help: consider using `_two_hearts_char` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `an_integer` Nov 29 23:09:47.973 INFO [stderr] --> src/main.rs:67:9 Nov 29 23:09:47.973 INFO [stderr] | Nov 29 23:09:47.973 INFO [stderr] 67 | let an_integer = 42; // default with inference (type i32 - The 32-bit signed integer type) Nov 29 23:09:47.973 INFO [stderr] | ^^^^^^^^^^ help: consider using `_an_integer` instead Nov 29 23:09:47.973 INFO [stderr] Nov 29 23:09:47.973 INFO [stderr] warning: unused variable: `a_float` Nov 29 23:09:47.974 INFO [stderr] --> src/main.rs:68:9 Nov 29 23:09:47.974 INFO [stderr] | Nov 29 23:09:47.974 INFO [stderr] 68 | let a_float = 1.0; // default with inference (type f64 - The 64-bit floating point type) Nov 29 23:09:47.974 INFO [stderr] | ^^^^^^^ help: consider using `_a_float` instead Nov 29 23:09:47.974 INFO [stderr] Nov 29 23:09:47.974 INFO [stderr] warning: unused variable: `complete_slice` Nov 29 23:09:47.974 INFO [stderr] --> src/main.rs:99:9 Nov 29 23:09:47.974 INFO [stderr] | Nov 29 23:09:47.974 INFO [stderr] 99 | let complete_slice = &mutable_array[..]; // [5, 7, 3, 23, 11] Nov 29 23:09:47.974 INFO [stderr] | ^^^^^^^^^^^^^^ help: consider using `_complete_slice` instead Nov 29 23:09:47.974 INFO [stderr] Nov 29 23:09:47.974 INFO [stderr] warning: unused variable: `partial_slice` Nov 29 23:09:47.974 INFO [stderr] --> src/main.rs:100:9 Nov 29 23:09:47.974 INFO [stderr] | Nov 29 23:09:47.974 INFO [stderr] 100 | let partial_slice = &mutable_array[1..3]; // [7, 4] - from item at index 1 to item at index 3 (excluded) Nov 29 23:09:47.974 INFO [stderr] | ^^^^^^^^^^^^^ help: consider using `_partial_slice` instead Nov 29 23:09:47.974 INFO [stderr] Nov 29 23:09:47.974 INFO [stderr] warning: unused variable: `from_item_till_end_slice` Nov 29 23:09:47.974 INFO [stderr] --> src/main.rs:101:9 Nov 29 23:09:47.974 INFO [stderr] | Nov 29 23:09:47.974 INFO [stderr] 101 | let from_item_till_end_slice = &mutable_array[1..]; // [7, 4, 23, 11] Nov 29 23:09:47.974 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `_from_item_till_end_slice` instead Nov 29 23:09:47.974 INFO [stderr] Nov 29 23:09:47.974 INFO [stderr] warning: unused variable: `from_beginning_till_item_slice` Nov 29 23:09:47.974 INFO [stderr] --> src/main.rs:102:9 Nov 29 23:09:47.974 INFO [stderr] | Nov 29 23:09:47.974 INFO [stderr] 102 | let from_beginning_till_item_slice = &mutable_array[..2]; // [5, 7] Nov 29 23:09:47.974 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `_from_beginning_till_item_slice` instead Nov 29 23:09:47.974 INFO [stderr] Nov 29 23:09:47.974 INFO [stderr] warning: unused variable: `tuple_one` Nov 29 23:09:47.974 INFO [stderr] --> src/main.rs:106:9 Nov 29 23:09:47.974 INFO [stderr] | Nov 29 23:09:47.974 INFO [stderr] 106 | let tuple_one = (1, "one"); Nov 29 23:09:47.974 INFO [stderr] | ^^^^^^^^^ help: consider using `_tuple_one` instead Nov 29 23:09:47.974 INFO [stderr] Nov 29 23:09:47.974 INFO [stderr] warning: value assigned to `tuple_xy` is never read Nov 29 23:09:47.974 INFO [stderr] --> src/main.rs:110:13 Nov 29 23:09:47.974 INFO [stderr] | Nov 29 23:09:47.974 INFO [stderr] 110 | let mut tuple_xy = (0, "zero"); Nov 29 23:09:47.974 INFO [stderr] | ^^^^^^^^ Nov 29 23:09:47.974 INFO [stderr] Nov 29 23:09:47.974 INFO [stderr] warning: unused variable: `tuple_second_item` Nov 29 23:09:47.974 INFO [stderr] --> src/main.rs:123:9 Nov 29 23:09:47.974 INFO [stderr] | Nov 29 23:09:47.974 INFO [stderr] 123 | let tuple_second_item = tuple_xy.1; Nov 29 23:09:47.974 INFO [stderr] | ^^^^^^^^^^^^^^^^^ help: consider using `_tuple_second_item` instead Nov 29 23:09:47.974 INFO [stderr] Nov 29 23:09:47.974 INFO [stderr] warning: unused variable: `x` Nov 29 23:09:47.974 INFO [stderr] --> src/main.rs:135:22 Nov 29 23:09:47.974 INFO [stderr] | Nov 29 23:09:47.974 INFO [stderr] 135 | fn always_return_one(x: i32) -> i32 { Nov 29 23:09:47.974 INFO [stderr] | ^ help: consider using `_x` instead Nov 29 23:09:47.974 INFO [stderr] Nov 29 23:09:47.988 INFO [stderr] warning: unnecessary parentheses around assigned value Nov 29 23:09:47.988 INFO [stderr] --> src/main.rs:37:13 Nov 29 23:09:47.988 INFO [stderr] | Nov 29 23:09:47.988 INFO [stderr] 37 | let j = (i = 6); // the value of an assignment is an empty tuple: so j has the value (), not 6 Nov 29 23:09:47.992 INFO [stderr] | ^^^^^^^ help: remove these parentheses Nov 29 23:09:47.992 INFO [stderr] | Nov 29 23:09:47.992 INFO [stderr] = note: #[warn(unused_parens)] on by default Nov 29 23:09:47.992 INFO [stderr] Nov 29 23:09:48.000 INFO [stderr] warning: variable does not need to be mutable Nov 29 23:09:48.000 INFO [stderr] --> src/main.rs:87:9 Nov 29 23:09:48.000 INFO [stderr] | Nov 29 23:09:48.000 INFO [stderr] 87 | let mut mutable_array = [1.5, 2.3, 3.0]; // type [f64; 3] Nov 29 23:09:48.000 INFO [stderr] | ----^^^^^^^^^^^^^ Nov 29 23:09:48.000 INFO [stderr] | | Nov 29 23:09:48.000 INFO [stderr] | help: remove this `mut` Nov 29 23:09:48.000 INFO [stderr] | Nov 29 23:09:48.000 INFO [stderr] = note: #[warn(unused_mut)] on by default Nov 29 23:09:48.000 INFO [stderr] Nov 29 23:09:48.000 INFO [stderr] warning: function is never used: `diverges` Nov 29 23:09:48.000 INFO [stderr] --> src/main.rs:140:1 Nov 29 23:09:48.000 INFO [stderr] | Nov 29 23:09:48.000 INFO [stderr] 140 | fn diverges() -> ! { // defines the return type as "diverges" using the bang symbol Nov 29 23:09:48.000 INFO [stderr] | ^^^^^^^^^^^^^^^^^^ Nov 29 23:09:48.000 INFO [stderr] | Nov 29 23:09:48.000 INFO [stderr] = note: #[warn(dead_code)] on by default Nov 29 23:09:48.000 INFO [stderr] Nov 29 23:09:48.025 INFO [stderr] warning: unreachable expression Nov 29 23:09:48.026 INFO [stderr] --> src/main.rs:137:5 Nov 29 23:09:48.026 INFO [stderr] | Nov 29 23:09:48.026 INFO [stderr] 137 | x // never executed Nov 29 23:09:48.026 INFO [stderr] | ^ Nov 29 23:09:48.026 INFO [stderr] | Nov 29 23:09:48.026 INFO [stderr] = note: #[warn(unreachable_code)] on by default Nov 29 23:09:48.027 INFO [stderr] Nov 29 23:09:48.031 INFO [stderr] warning: unused variable: `a` Nov 29 23:09:48.032 INFO [stderr] --> src/main.rs:7:9 Nov 29 23:09:48.032 INFO [stderr] | Nov 29 23:09:48.034 INFO [stderr] 7 | let a = 1; // type i32 is infered Nov 29 23:09:48.034 INFO [stderr] | ^ help: consider using `_a` instead Nov 29 23:09:48.034 INFO [stderr] | Nov 29 23:09:48.034 INFO [stderr] = note: #[warn(unused_variables)] on by default Nov 29 23:09:48.034 INFO [stderr] Nov 29 23:09:48.034 INFO [stderr] warning: unused variable: `b` Nov 29 23:09:48.034 INFO [stderr] --> src/main.rs:8:9 Nov 29 23:09:48.034 INFO [stderr] | Nov 29 23:09:48.034 INFO [stderr] 8 | let b: i32 = 2; // type i32 is explicitly declared Nov 29 23:09:48.034 INFO [stderr] | ^ help: consider using `_b` instead Nov 29 23:09:48.034 INFO [stderr] Nov 29 23:09:48.036 INFO [stderr] warning: unused variable: `c` Nov 29 23:09:48.036 INFO [stderr] --> src/main.rs:10:10 Nov 29 23:09:48.036 INFO [stderr] | Nov 29 23:09:48.036 INFO [stderr] 10 | let (c, d) = (3, 4); // variable bindings of multiple vars at the same time Nov 29 23:09:48.036 INFO [stderr] | ^ help: consider using `_c` instead Nov 29 23:09:48.036 INFO [stderr] Nov 29 23:09:48.036 INFO [stderr] warning: unused variable: `d` Nov 29 23:09:48.036 INFO [stderr] --> src/main.rs:10:13 Nov 29 23:09:48.036 INFO [stderr] | Nov 29 23:09:48.036 INFO [stderr] 10 | let (c, d) = (3, 4); // variable bindings of multiple vars at the same time Nov 29 23:09:48.036 INFO [stderr] | ^ help: consider using `_d` instead Nov 29 23:09:48.036 INFO [stderr] Nov 29 23:09:48.036 INFO [stderr] warning: unused variable: `e` Nov 29 23:09:48.036 INFO [stderr] --> src/main.rs:12:9 Nov 29 23:09:48.036 INFO [stderr] | Nov 29 23:09:48.036 INFO [stderr] 12 | let e: i32; Nov 29 23:09:48.036 INFO [stderr] | ^ help: consider using `_e` instead Nov 29 23:09:48.036 INFO [stderr] Nov 29 23:09:48.036 INFO [stderr] warning: variable `f` is assigned to, but never used Nov 29 23:09:48.036 INFO [stderr] --> src/main.rs:18:13 Nov 29 23:09:48.036 INFO [stderr] | Nov 29 23:09:48.036 INFO [stderr] 18 | let mut f = 5; // make variable mutable Nov 29 23:09:48.036 INFO [stderr] | ^ Nov 29 23:09:48.036 INFO [stderr] | Nov 29 23:09:48.036 INFO [stderr] = note: consider using `_f` instead Nov 29 23:09:48.036 INFO [stderr] Nov 29 23:09:48.036 INFO [stderr] warning: value assigned to `f` is never read Nov 29 23:09:48.036 INFO [stderr] --> src/main.rs:19:5 Nov 29 23:09:48.036 INFO [stderr] | Nov 29 23:09:48.036 INFO [stderr] 19 | f = 6; // now I can assign a new value (of the same type!) to this variable Nov 29 23:09:48.036 INFO [stderr] | ^ Nov 29 23:09:48.036 INFO [stderr] | Nov 29 23:09:48.040 INFO [stderr] = note: #[warn(unused_assignments)] on by default Nov 29 23:09:48.040 INFO [stderr] Nov 29 23:09:48.040 INFO [stderr] warning: unused variable: `f` Nov 29 23:09:48.040 INFO [stderr] --> src/main.rs:20:9 Nov 29 23:09:48.040 INFO [stderr] | Nov 29 23:09:48.040 INFO [stderr] 20 | let f = "Look, I am text now"; // shadowing, and changing type! Nov 29 23:09:48.040 INFO [stderr] | ^ help: consider using `_f` instead Nov 29 23:09:48.040 INFO [stderr] Nov 29 23:09:48.040 INFO [stderr] warning: value assigned to `i` is never read Nov 29 23:09:48.040 INFO [stderr] --> src/main.rs:36:13 Nov 29 23:09:48.040 INFO [stderr] | Nov 29 23:09:48.040 INFO [stderr] 36 | let mut i = 5; Nov 29 23:09:48.040 INFO [stderr] | ^ Nov 29 23:09:48.040 INFO [stderr] Nov 29 23:09:48.040 INFO [stderr] warning: unused variable: `j` Nov 29 23:09:48.040 INFO [stderr] --> src/main.rs:37:9 Nov 29 23:09:48.040 INFO [stderr] | Nov 29 23:09:48.040 INFO [stderr] 37 | let j = (i = 6); // the value of an assignment is an empty tuple: so j has the value (), not 6 Nov 29 23:09:48.040 INFO [stderr] | ^ help: consider using `_j` instead Nov 29 23:09:48.040 INFO [stderr] Nov 29 23:09:48.040 INFO [stderr] warning: unused variable: `a_boolean` Nov 29 23:09:48.040 INFO [stderr] --> src/main.rs:59:9 Nov 29 23:09:48.040 INFO [stderr] | Nov 29 23:09:48.040 INFO [stderr] 59 | let a_boolean = true; // with inference Nov 29 23:09:48.040 INFO [stderr] | ^^^^^^^^^ help: consider using `_a_boolean` instead Nov 29 23:09:48.040 INFO [stderr] Nov 29 23:09:48.040 INFO [stderr] warning: unused variable: `another_boolean` Nov 29 23:09:48.040 INFO [stderr] --> src/main.rs:60:9 Nov 29 23:09:48.040 INFO [stderr] | Nov 29 23:09:48.040 INFO [stderr] 60 | let another_boolean: bool = false; // without inference Nov 29 23:09:48.040 INFO [stderr] | ^^^^^^^^^^^^^^^ help: consider using `_another_boolean` instead Nov 29 23:09:48.040 INFO [stderr] Nov 29 23:09:48.040 INFO [stderr] warning: unused variable: `this_is_a_char` Nov 29 23:09:48.040 INFO [stderr] --> src/main.rs:63:9 Nov 29 23:09:48.040 INFO [stderr] | Nov 29 23:09:48.040 INFO [stderr] 63 | let this_is_a_char = 'x'; // delimited by a single quote/tick Nov 29 23:09:48.040 INFO [stderr] | ^^^^^^^^^^^^^^ help: consider using `_this_is_a_char` instead Nov 29 23:09:48.040 INFO [stderr] Nov 29 23:09:48.040 INFO [stderr] warning: unused variable: `two_hearts_char` Nov 29 23:09:48.040 INFO [stderr] --> src/main.rs:64:9 Nov 29 23:09:48.040 INFO [stderr] | Nov 29 23:09:48.040 INFO [stderr] 64 | let two_hearts_char = '💕'; // any unicode char (due to the fact that they are UTF-32, all chars are 4 bytes instead of just 1) Nov 29 23:09:48.040 INFO [stderr] | ^^^^^^^^^^^^^^^ help: consider using `_two_hearts_char` instead Nov 29 23:09:48.040 INFO [stderr] Nov 29 23:09:48.040 INFO [stderr] warning: unused variable: `an_integer` Nov 29 23:09:48.040 INFO [stderr] --> src/main.rs:67:9 Nov 29 23:09:48.040 INFO [stderr] | Nov 29 23:09:48.040 INFO [stderr] 67 | let an_integer = 42; // default with inference (type i32 - The 32-bit signed integer type) Nov 29 23:09:48.040 INFO [stderr] | ^^^^^^^^^^ help: consider using `_an_integer` instead Nov 29 23:09:48.040 INFO [stderr] Nov 29 23:09:48.040 INFO [stderr] warning: unused variable: `a_float` Nov 29 23:09:48.048 INFO [stderr] --> src/main.rs:68:9 Nov 29 23:09:48.048 INFO [stderr] | Nov 29 23:09:48.048 INFO [stderr] 68 | let a_float = 1.0; // default with inference (type f64 - The 64-bit floating point type) Nov 29 23:09:48.048 INFO [stderr] | ^^^^^^^ help: consider using `_a_float` instead Nov 29 23:09:48.048 INFO [stderr] Nov 29 23:09:48.048 INFO [stderr] warning: unused variable: `complete_slice` Nov 29 23:09:48.048 INFO [stderr] --> src/main.rs:99:9 Nov 29 23:09:48.048 INFO [stderr] | Nov 29 23:09:48.048 INFO [stderr] 99 | let complete_slice = &mutable_array[..]; // [5, 7, 3, 23, 11] Nov 29 23:09:48.048 INFO [stderr] | ^^^^^^^^^^^^^^ help: consider using `_complete_slice` instead Nov 29 23:09:48.048 INFO [stderr] Nov 29 23:09:48.048 INFO [stderr] warning: unused variable: `partial_slice` Nov 29 23:09:48.048 INFO [stderr] --> src/main.rs:100:9 Nov 29 23:09:48.048 INFO [stderr] | Nov 29 23:09:48.048 INFO [stderr] 100 | let partial_slice = &mutable_array[1..3]; // [7, 4] - from item at index 1 to item at index 3 (excluded) Nov 29 23:09:48.048 INFO [stderr] | ^^^^^^^^^^^^^ help: consider using `_partial_slice` instead Nov 29 23:09:48.048 INFO [stderr] Nov 29 23:09:48.048 INFO [stderr] warning: unused variable: `from_item_till_end_slice` Nov 29 23:09:48.048 INFO [stderr] --> src/main.rs:101:9 Nov 29 23:09:48.048 INFO [stderr] | Nov 29 23:09:48.048 INFO [stderr] 101 | let from_item_till_end_slice = &mutable_array[1..]; // [7, 4, 23, 11] Nov 29 23:09:48.048 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `_from_item_till_end_slice` instead Nov 29 23:09:48.048 INFO [stderr] Nov 29 23:09:48.048 INFO [stderr] warning: unused variable: `from_beginning_till_item_slice` Nov 29 23:09:48.048 INFO [stderr] --> src/main.rs:102:9 Nov 29 23:09:48.048 INFO [stderr] | Nov 29 23:09:48.048 INFO [stderr] 102 | let from_beginning_till_item_slice = &mutable_array[..2]; // [5, 7] Nov 29 23:09:48.048 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `_from_beginning_till_item_slice` instead Nov 29 23:09:48.048 INFO [stderr] Nov 29 23:09:48.048 INFO [stderr] warning: unused variable: `tuple_one` Nov 29 23:09:48.048 INFO [stderr] --> src/main.rs:106:9 Nov 29 23:09:48.048 INFO [stderr] | Nov 29 23:09:48.048 INFO [stderr] 106 | let tuple_one = (1, "one"); Nov 29 23:09:48.048 INFO [stderr] | ^^^^^^^^^ help: consider using `_tuple_one` instead Nov 29 23:09:48.048 INFO [stderr] Nov 29 23:09:48.048 INFO [stderr] warning: value assigned to `tuple_xy` is never read Nov 29 23:09:48.048 INFO [stderr] --> src/main.rs:110:13 Nov 29 23:09:48.048 INFO [stderr] | Nov 29 23:09:48.048 INFO [stderr] 110 | let mut tuple_xy = (0, "zero"); Nov 29 23:09:48.048 INFO [stderr] | ^^^^^^^^ Nov 29 23:09:48.048 INFO [stderr] Nov 29 23:09:48.048 INFO [stderr] warning: unused variable: `tuple_second_item` Nov 29 23:09:48.049 INFO [stderr] --> src/main.rs:123:9 Nov 29 23:09:48.049 INFO [stderr] | Nov 29 23:09:48.049 INFO [stderr] 123 | let tuple_second_item = tuple_xy.1; Nov 29 23:09:48.049 INFO [stderr] | ^^^^^^^^^^^^^^^^^ help: consider using `_tuple_second_item` instead Nov 29 23:09:48.049 INFO [stderr] Nov 29 23:09:48.049 INFO [stderr] warning: unused variable: `x` Nov 29 23:09:48.049 INFO [stderr] --> src/main.rs:135:22 Nov 29 23:09:48.049 INFO [stderr] | Nov 29 23:09:48.049 INFO [stderr] 135 | fn always_return_one(x: i32) -> i32 { Nov 29 23:09:48.049 INFO [stderr] | ^ help: consider using `_x` instead Nov 29 23:09:48.049 INFO [stderr] Nov 29 23:09:48.056 INFO [stderr] warning: variable does not need to be mutable Nov 29 23:09:48.056 INFO [stderr] --> src/main.rs:87:9 Nov 29 23:09:48.056 INFO [stderr] | Nov 29 23:09:48.056 INFO [stderr] 87 | let mut mutable_array = [1.5, 2.3, 3.0]; // type [f64; 3] Nov 29 23:09:48.056 INFO [stderr] | ----^^^^^^^^^^^^^ Nov 29 23:09:48.056 INFO [stderr] | | Nov 29 23:09:48.056 INFO [stderr] | help: remove this `mut` Nov 29 23:09:48.056 INFO [stderr] | Nov 29 23:09:48.056 INFO [stderr] = note: #[warn(unused_mut)] on by default Nov 29 23:09:48.056 INFO [stderr] Nov 29 23:09:48.060 INFO [stderr] warning: function is never used: `diverges` Nov 29 23:09:48.060 INFO [stderr] --> src/main.rs:140:1 Nov 29 23:09:48.060 INFO [stderr] | Nov 29 23:09:48.060 INFO [stderr] 140 | fn diverges() -> ! { // defines the return type as "diverges" using the bang symbol Nov 29 23:09:48.060 INFO [stderr] | ^^^^^^^^^^^^^^^^^^ Nov 29 23:09:48.060 INFO [stderr] | Nov 29 23:09:48.060 INFO [stderr] = note: #[warn(dead_code)] on by default Nov 29 23:09:48.060 INFO [stderr] Nov 29 23:09:48.084 INFO [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.82s Nov 29 23:09:48.084 INFO [stderr] su: No module specific data is present Nov 29 23:09:48.962 INFO running `"docker" "inspect" "af47f7e98c8fd3fadb44661cea735452033ff48e4874a40cc59a4104db92ea50"` Nov 29 23:09:49.158 INFO running `"docker" "rm" "-f" "af47f7e98c8fd3fadb44661cea735452033ff48e4874a40cc59a4104db92ea50"` Nov 29 23:09:49.446 INFO [stdout] af47f7e98c8fd3fadb44661cea735452033ff48e4874a40cc59a4104db92ea50