Dec 01 16:14:11.376 INFO testing guni973/learn_rust against 1.30.1 for beta-1.31-5
Dec 01 16:14:11.376 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/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 +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 01 16:14:11.864 INFO [stdout] b89fdf6d47230c47eaa6b7d9e56c6a4853a6f14ef6e32325c7ff42e82d11af94
Dec 01 16:14:11.867 INFO running `"docker" "start" "-a" "b89fdf6d47230c47eaa6b7d9e56c6a4853a6f14ef6e32325c7ff42e82d11af94"`
Dec 01 16:14:13.719 INFO [stderr] usermod: no changes
Dec 01 16:14:13.767 INFO [stderr]    Compiling hello_world v0.1.0 (/source)
Dec 01 16:14:14.274 INFO [stderr] warning: unreachable statement
Dec 01 16:14:14.274 INFO [stderr]    --> src/main.rs:102:5
Dec 01 16:14:14.279 INFO [stderr]     |
Dec 01 16:14:14.279 INFO [stderr] 102 |     let mut x = 5;
Dec 01 16:14:14.279 INFO [stderr]     |     ^^^^^^^^^^^^^^
Dec 01 16:14:14.279 INFO [stderr]     |
Dec 01 16:14:14.279 INFO [stderr]     = note: #[warn(unreachable_code)] on by default
Dec 01 16:14:14.279 INFO [stderr] 
Dec 01 16:14:14.301 INFO [stderr] warning: unused variable: `a`
Dec 01 16:14:14.307 INFO [stderr]  --> src/main.rs:6:9
Dec 01 16:14:14.307 INFO [stderr]   |
Dec 01 16:14:14.307 INFO [stderr] 6 |     let a = 5;
Dec 01 16:14:14.307 INFO [stderr]   |         ^ help: consider using `_a` instead
Dec 01 16:14:14.307 INFO [stderr]   |
Dec 01 16:14:14.307 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 01 16:14:14.307 INFO [stderr] 
Dec 01 16:14:14.307 INFO [stderr] warning: unused variable: `b`
Dec 01 16:14:14.307 INFO [stderr]  --> src/main.rs:8:9
Dec 01 16:14:14.307 INFO [stderr]   |
Dec 01 16:14:14.307 INFO [stderr] 8 |     let b: i32 = 5;
Dec 01 16:14:14.307 INFO [stderr]   |         ^ help: consider using `_b` instead
Dec 01 16:14:14.307 INFO [stderr] 
Dec 01 16:14:14.307 INFO [stderr] warning: unused variable: `c`
Dec 01 16:14:14.307 INFO [stderr]   --> src/main.rs:10:9
Dec 01 16:14:14.307 INFO [stderr]    |
Dec 01 16:14:14.307 INFO [stderr] 10 |     let c: u32 = 5;
Dec 01 16:14:14.307 INFO [stderr]    |         ^ help: consider using `_c` instead
Dec 01 16:14:14.307 INFO [stderr] 
Dec 01 16:14:14.307 INFO [stderr] warning: unused variable: `d`
Dec 01 16:14:14.307 INFO [stderr]   --> src/main.rs:12:13
Dec 01 16:14:14.307 INFO [stderr]    |
Dec 01 16:14:14.307 INFO [stderr] 12 |     let mut d = 5;
Dec 01 16:14:14.307 INFO [stderr]    |             ^ help: consider using `_d` instead
Dec 01 16:14:14.307 INFO [stderr] 
Dec 01 16:14:14.307 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:14.307 INFO [stderr]   --> src/main.rs:19:10
Dec 01 16:14:14.307 INFO [stderr]    |
Dec 01 16:14:14.307 INFO [stderr] 19 |     let (x, y) = (1, 2);
Dec 01 16:14:14.307 INFO [stderr]    |          ^ help: consider using `_x` instead
Dec 01 16:14:14.307 INFO [stderr] 
Dec 01 16:14:14.307 INFO [stderr] warning: unused variable: `y`
Dec 01 16:14:14.307 INFO [stderr]   --> src/main.rs:19:13
Dec 01 16:14:14.307 INFO [stderr]    |
Dec 01 16:14:14.307 INFO [stderr] 19 |     let (x, y) = (1, 2);
Dec 01 16:14:14.307 INFO [stderr]    |             ^ help: consider using `_y` instead
Dec 01 16:14:14.307 INFO [stderr] 
Dec 01 16:14:14.307 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:14.307 INFO [stderr]   --> src/main.rs:38:9
Dec 01 16:14:14.307 INFO [stderr]    |
Dec 01 16:14:14.307 INFO [stderr] 38 |     let x = true;
Dec 01 16:14:14.307 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 01 16:14:14.307 INFO [stderr] 
Dec 01 16:14:14.307 INFO [stderr] warning: unused variable: `y`
Dec 01 16:14:14.307 INFO [stderr]   --> src/main.rs:39:9
Dec 01 16:14:14.307 INFO [stderr]    |
Dec 01 16:14:14.307 INFO [stderr] 39 |     let y: bool = false;
Dec 01 16:14:14.307 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 01 16:14:14.307 INFO [stderr] 
Dec 01 16:14:14.307 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:14.307 INFO [stderr]   --> src/main.rs:44:9
Dec 01 16:14:14.307 INFO [stderr]    |
Dec 01 16:14:14.307 INFO [stderr] 44 |     let x = 'x';
Dec 01 16:14:14.308 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `two_hearts`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:45:9
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 45 |     let two_hearts = '¶';
Dec 01 16:14:14.308 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_two_hearts` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:48:9
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 48 |     let x = 42; // xはi32型を持つ
Dec 01 16:14:14.308 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `y`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:49:9
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 49 |     let y = 1.0; // yはf64型を持つ
Dec 01 16:14:14.308 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `a`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:52:9
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 52 |     let a = [0, 1, 2, 3, 4];
Dec 01 16:14:14.308 INFO [stderr]    |         ^ help: consider using `_a` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `m`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:53:13
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 53 |     let mut m = [1, 2, 3];
Dec 01 16:14:14.308 INFO [stderr]    |             ^ help: consider using `_m` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `complete`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:60:9
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 60 |     let complete = &a[..];
Dec 01 16:14:14.308 INFO [stderr]    |         ^^^^^^^^ help: consider using `_complete` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `middle`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:62:9
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 62 |     let middle = &a[1..4];
Dec 01 16:14:14.308 INFO [stderr]    |         ^^^^^^ help: consider using `_middle` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:67:9
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 67 |     let x = (1, "hello");
Dec 01 16:14:14.308 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:68:9
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 68 |     let x: (i32, &str) = (1, "hello");
Dec 01 16:14:14.308 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: variable `x` is assigned to, but never used
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:70:13
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 70 |     let mut x = (1, 2);
Dec 01 16:14:14.308 INFO [stderr]    |             ^
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr]    = note: consider using `_x` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: value assigned to `x` is never read
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:72:5
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 72 |     x = y;
Dec 01 16:14:14.308 INFO [stderr]    |     ^
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:74:10
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 01 16:14:14.308 INFO [stderr]    |          ^ help: consider using `_x` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `y`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:74:13
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 01 16:14:14.308 INFO [stderr]    |             ^ help: consider using `_y` instead
Dec 01 16:14:14.308 INFO [stderr] 
Dec 01 16:14:14.308 INFO [stderr] warning: unused variable: `z`
Dec 01 16:14:14.308 INFO [stderr]   --> src/main.rs:74:16
Dec 01 16:14:14.308 INFO [stderr]    |
Dec 01 16:14:14.308 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 01 16:14:14.309 INFO [stderr]    |                ^ help: consider using `_z` instead
Dec 01 16:14:14.309 INFO [stderr] 
Dec 01 16:14:14.309 INFO [stderr] warning: unused variable: `y`
Dec 01 16:14:14.309 INFO [stderr]   --> src/main.rs:93:9
Dec 01 16:14:14.309 INFO [stderr]    |
Dec 01 16:14:14.309 INFO [stderr] 93 |     let y = if x == 5 { 10 } else { 15 };
Dec 01 16:14:14.309 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 01 16:14:14.309 INFO [stderr] 
Dec 01 16:14:14.309 INFO [stderr] warning: variable does not need to be mutable
Dec 01 16:14:14.309 INFO [stderr]   --> src/main.rs:12:9
Dec 01 16:14:14.309 INFO [stderr]    |
Dec 01 16:14:14.309 INFO [stderr] 12 |     let mut d = 5;
Dec 01 16:14:14.309 INFO [stderr]    |         ----^
Dec 01 16:14:14.309 INFO [stderr]    |         |
Dec 01 16:14:14.309 INFO [stderr]    |         help: remove this `mut`
Dec 01 16:14:14.309 INFO [stderr]    |
Dec 01 16:14:14.309 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 01 16:14:14.309 INFO [stderr] 
Dec 01 16:14:14.309 INFO [stderr] warning: variable does not need to be mutable
Dec 01 16:14:14.309 INFO [stderr]   --> src/main.rs:53:9
Dec 01 16:14:14.309 INFO [stderr]    |
Dec 01 16:14:14.309 INFO [stderr] 53 |     let mut m = [1, 2, 3];
Dec 01 16:14:14.309 INFO [stderr]    |         ----^
Dec 01 16:14:14.309 INFO [stderr]    |         |
Dec 01 16:14:14.309 INFO [stderr]    |         help: remove this `mut`
Dec 01 16:14:14.309 INFO [stderr] 
Dec 01 16:14:14.320 INFO [stderr] warning: function is never used: `declartion`
Dec 01 16:14:14.320 INFO [stderr]  --> src/main.rs:3:1
Dec 01 16:14:14.320 INFO [stderr]   |
Dec 01 16:14:14.320 INFO [stderr] 3 | fn declartion () {
Dec 01 16:14:14.320 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 01 16:14:14.320 INFO [stderr]   |
Dec 01 16:14:14.320 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 01 16:14:14.320 INFO [stderr] 
Dec 01 16:14:14.320 INFO [stderr] warning: function is never used: `print_number`
Dec 01 16:14:14.320 INFO [stderr]   --> src/main.rs:26:1
Dec 01 16:14:14.320 INFO [stderr]    |
Dec 01 16:14:14.320 INFO [stderr] 26 | fn print_number(x: i32) {
Dec 01 16:14:14.320 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 16:14:14.320 INFO [stderr] 
Dec 01 16:14:14.320 INFO [stderr] warning: function is never used: `add_one`
Dec 01 16:14:14.320 INFO [stderr]   --> src/main.rs:31:1
Dec 01 16:14:14.320 INFO [stderr]    |
Dec 01 16:14:14.320 INFO [stderr] 31 | fn add_one(x: i32) -> i32 {
Dec 01 16:14:14.320 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 16:14:14.320 INFO [stderr] 
Dec 01 16:14:14.320 INFO [stderr] warning: function is never used: `primitive`
Dec 01 16:14:14.320 INFO [stderr]   --> src/main.rs:36:1
Dec 01 16:14:14.320 INFO [stderr]    |
Dec 01 16:14:14.320 INFO [stderr] 36 | fn primitive() {
Dec 01 16:14:14.320 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 01 16:14:14.320 INFO [stderr] 
Dec 01 16:14:14.320 INFO [stderr] warning: function is never used: `if_demo`
Dec 01 16:14:14.321 INFO [stderr]   --> src/main.rs:80:1
Dec 01 16:14:14.321 INFO [stderr]    |
Dec 01 16:14:14.321 INFO [stderr] 80 | fn if_demo() {
Dec 01 16:14:14.321 INFO [stderr]    | ^^^^^^^^^^^^
Dec 01 16:14:14.321 INFO [stderr] 
Dec 01 16:14:14.321 INFO [stderr] warning: function is never used: `loop_demo`
Dec 01 16:14:14.321 INFO [stderr]   --> src/main.rs:97:1
Dec 01 16:14:14.321 INFO [stderr]    |
Dec 01 16:14:14.321 INFO [stderr] 97 | fn loop_demo () {
Dec 01 16:14:14.321 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 01 16:14:14.321 INFO [stderr] 
Dec 01 16:14:14.797 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.06s
Dec 01 16:14:14.799 INFO [stderr] su: No module specific data is present
Dec 01 16:14:15.449 INFO running `"docker" "inspect" "b89fdf6d47230c47eaa6b7d9e56c6a4853a6f14ef6e32325c7ff42e82d11af94"`
Dec 01 16:14:15.675 INFO running `"docker" "rm" "-f" "b89fdf6d47230c47eaa6b7d9e56c6a4853a6f14ef6e32325c7ff42e82d11af94"`
Dec 01 16:14:15.931 INFO [stdout] b89fdf6d47230c47eaa6b7d9e56c6a4853a6f14ef6e32325c7ff42e82d11af94
Dec 01 16:14:15.938 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/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 +1.30.1 test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 01 16:14:16.423 INFO [stdout] 6c84d8f4b5a1b07337ce616a641a357393712b0992bf555181877e300998b5fa
Dec 01 16:14:16.425 INFO running `"docker" "start" "-a" "6c84d8f4b5a1b07337ce616a641a357393712b0992bf555181877e300998b5fa"`
Dec 01 16:14:17.524 INFO [stderr] usermod: no changes
Dec 01 16:14:17.571 INFO [stderr]    Compiling hello_world v0.1.0 (/source)
Dec 01 16:14:18.047 INFO [stderr] warning: unreachable statement
Dec 01 16:14:18.047 INFO [stderr]    --> src/main.rs:102:5
Dec 01 16:14:18.047 INFO [stderr]     |
Dec 01 16:14:18.047 INFO [stderr] 102 |     let mut x = 5;
Dec 01 16:14:18.047 INFO [stderr]     |     ^^^^^^^^^^^^^^
Dec 01 16:14:18.047 INFO [stderr]     |
Dec 01 16:14:18.047 INFO [stderr]     = note: #[warn(unreachable_code)] on by default
Dec 01 16:14:18.047 INFO [stderr] 
Dec 01 16:14:18.058 INFO [stderr] warning: unused variable: `a`
Dec 01 16:14:18.059 INFO [stderr]  --> src/main.rs:6:9
Dec 01 16:14:18.059 INFO [stderr]   |
Dec 01 16:14:18.059 INFO [stderr] 6 |     let a = 5;
Dec 01 16:14:18.059 INFO [stderr]   |         ^ help: consider using `_a` instead
Dec 01 16:14:18.059 INFO [stderr]   |
Dec 01 16:14:18.059 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 01 16:14:18.059 INFO [stderr] 
Dec 01 16:14:18.059 INFO [stderr] warning: unused variable: `b`
Dec 01 16:14:18.059 INFO [stderr]  --> src/main.rs:8:9
Dec 01 16:14:18.059 INFO [stderr]   |
Dec 01 16:14:18.059 INFO [stderr] 8 |     let b: i32 = 5;
Dec 01 16:14:18.059 INFO [stderr]   |         ^ help: consider using `_b` instead
Dec 01 16:14:18.059 INFO [stderr] 
Dec 01 16:14:18.059 INFO [stderr] warning: unused variable: `c`
Dec 01 16:14:18.059 INFO [stderr]   --> src/main.rs:10:9
Dec 01 16:14:18.059 INFO [stderr]    |
Dec 01 16:14:18.059 INFO [stderr] 10 |     let c: u32 = 5;
Dec 01 16:14:18.059 INFO [stderr]    |         ^ help: consider using `_c` instead
Dec 01 16:14:18.059 INFO [stderr] 
Dec 01 16:14:18.059 INFO [stderr] warning: unused variable: `d`
Dec 01 16:14:18.059 INFO [stderr]   --> src/main.rs:12:13
Dec 01 16:14:18.059 INFO [stderr]    |
Dec 01 16:14:18.060 INFO [stderr] 12 |     let mut d = 5;
Dec 01 16:14:18.060 INFO [stderr]    |             ^ help: consider using `_d` instead
Dec 01 16:14:18.060 INFO [stderr] 
Dec 01 16:14:18.060 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:18.060 INFO [stderr]   --> src/main.rs:19:10
Dec 01 16:14:18.060 INFO [stderr]    |
Dec 01 16:14:18.060 INFO [stderr] 19 |     let (x, y) = (1, 2);
Dec 01 16:14:18.060 INFO [stderr]    |          ^ help: consider using `_x` instead
Dec 01 16:14:18.060 INFO [stderr] 
Dec 01 16:14:18.060 INFO [stderr] warning: unused variable: `y`
Dec 01 16:14:18.060 INFO [stderr]   --> src/main.rs:19:13
Dec 01 16:14:18.060 INFO [stderr]    |
Dec 01 16:14:18.060 INFO [stderr] 19 |     let (x, y) = (1, 2);
Dec 01 16:14:18.060 INFO [stderr]    |             ^ help: consider using `_y` instead
Dec 01 16:14:18.060 INFO [stderr] 
Dec 01 16:14:18.066 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:18.066 INFO [stderr]   --> src/main.rs:38:9
Dec 01 16:14:18.066 INFO [stderr]    |
Dec 01 16:14:18.067 INFO [stderr] 38 |     let x = true;
Dec 01 16:14:18.067 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 01 16:14:18.067 INFO [stderr] 
Dec 01 16:14:18.067 INFO [stderr] warning: unused variable: `y`
Dec 01 16:14:18.067 INFO [stderr]   --> src/main.rs:39:9
Dec 01 16:14:18.067 INFO [stderr]    |
Dec 01 16:14:18.067 INFO [stderr] 39 |     let y: bool = false;
Dec 01 16:14:18.067 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:44:9
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 44 |     let x = 'x';
Dec 01 16:14:18.069 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `two_hearts`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:45:9
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 45 |     let two_hearts = '¶';
Dec 01 16:14:18.069 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_two_hearts` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:48:9
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 48 |     let x = 42; // xはi32型を持つ
Dec 01 16:14:18.069 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `y`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:49:9
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 49 |     let y = 1.0; // yはf64型を持つ
Dec 01 16:14:18.069 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `a`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:52:9
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 52 |     let a = [0, 1, 2, 3, 4];
Dec 01 16:14:18.069 INFO [stderr]    |         ^ help: consider using `_a` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `m`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:53:13
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 53 |     let mut m = [1, 2, 3];
Dec 01 16:14:18.069 INFO [stderr]    |             ^ help: consider using `_m` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `complete`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:60:9
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 60 |     let complete = &a[..];
Dec 01 16:14:18.069 INFO [stderr]    |         ^^^^^^^^ help: consider using `_complete` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `middle`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:62:9
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 62 |     let middle = &a[1..4];
Dec 01 16:14:18.069 INFO [stderr]    |         ^^^^^^ help: consider using `_middle` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:67:9
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 67 |     let x = (1, "hello");
Dec 01 16:14:18.069 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:68:9
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 68 |     let x: (i32, &str) = (1, "hello");
Dec 01 16:14:18.069 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: variable `x` is assigned to, but never used
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:70:13
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 70 |     let mut x = (1, 2);
Dec 01 16:14:18.069 INFO [stderr]    |             ^
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr]    = note: consider using `_x` instead
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: value assigned to `x` is never read
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:72:5
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr] 72 |     x = y;
Dec 01 16:14:18.069 INFO [stderr]    |     ^
Dec 01 16:14:18.069 INFO [stderr]    |
Dec 01 16:14:18.069 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 01 16:14:18.069 INFO [stderr] 
Dec 01 16:14:18.069 INFO [stderr] warning: unused variable: `x`
Dec 01 16:14:18.069 INFO [stderr]   --> src/main.rs:74:10
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 01 16:14:18.070 INFO [stderr]    |          ^ help: consider using `_x` instead
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: unused variable: `y`
Dec 01 16:14:18.070 INFO [stderr]   --> src/main.rs:74:13
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 01 16:14:18.070 INFO [stderr]    |             ^ help: consider using `_y` instead
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: unused variable: `z`
Dec 01 16:14:18.070 INFO [stderr]   --> src/main.rs:74:16
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 01 16:14:18.070 INFO [stderr]    |                ^ help: consider using `_z` instead
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: unused variable: `y`
Dec 01 16:14:18.070 INFO [stderr]   --> src/main.rs:93:9
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 93 |     let y = if x == 5 { 10 } else { 15 };
Dec 01 16:14:18.070 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: variable does not need to be mutable
Dec 01 16:14:18.070 INFO [stderr]   --> src/main.rs:12:9
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 12 |     let mut d = 5;
Dec 01 16:14:18.070 INFO [stderr]    |         ----^
Dec 01 16:14:18.070 INFO [stderr]    |         |
Dec 01 16:14:18.070 INFO [stderr]    |         help: remove this `mut`
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: variable does not need to be mutable
Dec 01 16:14:18.070 INFO [stderr]   --> src/main.rs:53:9
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 53 |     let mut m = [1, 2, 3];
Dec 01 16:14:18.070 INFO [stderr]    |         ----^
Dec 01 16:14:18.070 INFO [stderr]    |         |
Dec 01 16:14:18.070 INFO [stderr]    |         help: remove this `mut`
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: function is never used: `declartion`
Dec 01 16:14:18.070 INFO [stderr]  --> src/main.rs:3:1
Dec 01 16:14:18.070 INFO [stderr]   |
Dec 01 16:14:18.070 INFO [stderr] 3 | fn declartion () {
Dec 01 16:14:18.070 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 01 16:14:18.070 INFO [stderr]   |
Dec 01 16:14:18.070 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: function is never used: `print_number`
Dec 01 16:14:18.070 INFO [stderr]   --> src/main.rs:26:1
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 26 | fn print_number(x: i32) {
Dec 01 16:14:18.070 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: function is never used: `add_one`
Dec 01 16:14:18.070 INFO [stderr]   --> src/main.rs:31:1
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 31 | fn add_one(x: i32) -> i32 {
Dec 01 16:14:18.070 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: function is never used: `primitive`
Dec 01 16:14:18.070 INFO [stderr]   --> src/main.rs:36:1
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 36 | fn primitive() {
Dec 01 16:14:18.070 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: function is never used: `if_demo`
Dec 01 16:14:18.070 INFO [stderr]   --> src/main.rs:80:1
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 80 | fn if_demo() {
Dec 01 16:14:18.070 INFO [stderr]    | ^^^^^^^^^^^^
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.070 INFO [stderr] warning: function is never used: `loop_demo`
Dec 01 16:14:18.070 INFO [stderr]   --> src/main.rs:97:1
Dec 01 16:14:18.070 INFO [stderr]    |
Dec 01 16:14:18.070 INFO [stderr] 97 | fn loop_demo () {
Dec 01 16:14:18.070 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 01 16:14:18.070 INFO [stderr] 
Dec 01 16:14:18.491 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
Dec 01 16:14:18.493 INFO [stderr] su: No module specific data is present
Dec 01 16:14:18.797 INFO running `"docker" "inspect" "6c84d8f4b5a1b07337ce616a641a357393712b0992bf555181877e300998b5fa"`
Dec 01 16:14:18.961 INFO running `"docker" "rm" "-f" "6c84d8f4b5a1b07337ce616a641a357393712b0992bf555181877e300998b5fa"`
Dec 01 16:14:19.116 INFO [stdout] 6c84d8f4b5a1b07337ce616a641a357393712b0992bf555181877e300998b5fa
Dec 01 16:14:19.119 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/beta-1.31-5/1.30.1:/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 +1.30.1 test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 01 16:14:19.285 INFO [stdout] b67d1c019f054f12a0e315e5f80b2954790fb540bbe083b83cdcd6f305c7c087
Dec 01 16:14:19.287 INFO running `"docker" "start" "-a" "b67d1c019f054f12a0e315e5f80b2954790fb540bbe083b83cdcd6f305c7c087"`
Dec 01 16:14:19.658 INFO [stderr] usermod: no changes
Dec 01 16:14:19.696 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 01 16:14:19.696 INFO [stderr]      Running /target/debug/deps/hello_world-7ff815022d81ac75
Dec 01 16:14:19.700 INFO [stdout] 
Dec 01 16:14:19.700 INFO [stdout] running 0 tests
Dec 01 16:14:19.700 INFO [stdout] 
Dec 01 16:14:19.700 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 01 16:14:19.700 INFO [stdout] 
Dec 01 16:14:19.702 INFO [stderr] su: No module specific data is present
Dec 01 16:14:20.004 INFO running `"docker" "inspect" "b67d1c019f054f12a0e315e5f80b2954790fb540bbe083b83cdcd6f305c7c087"`
Dec 01 16:14:20.123 INFO running `"docker" "rm" "-f" "b67d1c019f054f12a0e315e5f80b2954790fb540bbe083b83cdcd6f305c7c087"`
Dec 01 16:14:20.342 INFO [stdout] b67d1c019f054f12a0e315e5f80b2954790fb540bbe083b83cdcd6f305c7c087
