Dec 13 17:56:56.044 INFO testing guni973/learn_rust against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 13 17:56:56.044 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-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"`
Dec 13 17:56:56.403 INFO [stdout] 5fcfbdb9262c8c9d1ecb62e926d41a5d086cf4a02e1d59a06d28fad55d74d2df
Dec 13 17:56:56.405 INFO running `"docker" "start" "-a" "5fcfbdb9262c8c9d1ecb62e926d41a5d086cf4a02e1d59a06d28fad55d74d2df"`
Dec 13 17:56:57.135 INFO [stderr] usermod: no changes
Dec 13 17:56:57.161 INFO [stderr]    Compiling hello_world v0.1.0 (/source)
Dec 13 17:56:57.487 INFO [stderr] warning: unreachable statement
Dec 13 17:56:57.487 INFO [stderr]    --> src/main.rs:102:5
Dec 13 17:56:57.487 INFO [stderr]     |
Dec 13 17:56:57.487 INFO [stderr] 102 |     let mut x = 5;
Dec 13 17:56:57.487 INFO [stderr]     |     ^^^^^^^^^^^^^^
Dec 13 17:56:57.487 INFO [stderr]     |
Dec 13 17:56:57.487 INFO [stderr]     = note: #[warn(unreachable_code)] on by default
Dec 13 17:56:57.487 INFO [stderr] 
Dec 13 17:56:57.499 INFO [stderr] warning: unused variable: `a`
Dec 13 17:56:57.499 INFO [stderr]  --> src/main.rs:6:9
Dec 13 17:56:57.499 INFO [stderr]   |
Dec 13 17:56:57.499 INFO [stderr] 6 |     let a = 5;
Dec 13 17:56:57.499 INFO [stderr]   |         ^ help: consider using `_a` instead
Dec 13 17:56:57.499 INFO [stderr]   |
Dec 13 17:56:57.499 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 13 17:56:57.499 INFO [stderr] 
Dec 13 17:56:57.499 INFO [stderr] warning: unused variable: `b`
Dec 13 17:56:57.499 INFO [stderr]  --> src/main.rs:8:9
Dec 13 17:56:57.499 INFO [stderr]   |
Dec 13 17:56:57.499 INFO [stderr] 8 |     let b: i32 = 5;
Dec 13 17:56:57.499 INFO [stderr]   |         ^ help: consider using `_b` instead
Dec 13 17:56:57.499 INFO [stderr] 
Dec 13 17:56:57.499 INFO [stderr] warning: unused variable: `c`
Dec 13 17:56:57.499 INFO [stderr]   --> src/main.rs:10:9
Dec 13 17:56:57.499 INFO [stderr]    |
Dec 13 17:56:57.499 INFO [stderr] 10 |     let c: u32 = 5;
Dec 13 17:56:57.499 INFO [stderr]    |         ^ help: consider using `_c` instead
Dec 13 17:56:57.499 INFO [stderr] 
Dec 13 17:56:57.499 INFO [stderr] warning: unused variable: `d`
Dec 13 17:56:57.499 INFO [stderr]   --> src/main.rs:12:13
Dec 13 17:56:57.499 INFO [stderr]    |
Dec 13 17:56:57.499 INFO [stderr] 12 |     let mut d = 5;
Dec 13 17:56:57.499 INFO [stderr]    |             ^ help: consider using `_d` instead
Dec 13 17:56:57.499 INFO [stderr] 
Dec 13 17:56:57.499 INFO [stderr] warning: unused variable: `x`
Dec 13 17:56:57.499 INFO [stderr]   --> src/main.rs:19:10
Dec 13 17:56:57.499 INFO [stderr]    |
Dec 13 17:56:57.499 INFO [stderr] 19 |     let (x, y) = (1, 2);
Dec 13 17:56:57.500 INFO [stderr]    |          ^ help: consider using `_x` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `y`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:19:13
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 19 |     let (x, y) = (1, 2);
Dec 13 17:56:57.500 INFO [stderr]    |             ^ help: consider using `_y` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `x`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:38:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 38 |     let x = true;
Dec 13 17:56:57.500 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `y`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:39:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 39 |     let y: bool = false;
Dec 13 17:56:57.500 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `x`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:44:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 44 |     let x = 'x';
Dec 13 17:56:57.500 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `two_hearts`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:45:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 45 |     let two_hearts = '¶';
Dec 13 17:56:57.500 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_two_hearts` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `x`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:48:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 48 |     let x = 42; // xはi32型を持つ
Dec 13 17:56:57.500 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `y`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:49:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 49 |     let y = 1.0; // yはf64型を持つ
Dec 13 17:56:57.500 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `a`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:52:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 52 |     let a = [0, 1, 2, 3, 4];
Dec 13 17:56:57.500 INFO [stderr]    |         ^ help: consider using `_a` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `m`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:53:13
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 53 |     let mut m = [1, 2, 3];
Dec 13 17:56:57.500 INFO [stderr]    |             ^ help: consider using `_m` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `complete`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:60:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 60 |     let complete = &a[..];
Dec 13 17:56:57.500 INFO [stderr]    |         ^^^^^^^^ help: consider using `_complete` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `middle`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:62:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 62 |     let middle = &a[1..4];
Dec 13 17:56:57.500 INFO [stderr]    |         ^^^^^^ help: consider using `_middle` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `x`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:67:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 67 |     let x = (1, "hello");
Dec 13 17:56:57.500 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.500 INFO [stderr] warning: unused variable: `x`
Dec 13 17:56:57.500 INFO [stderr]   --> src/main.rs:68:9
Dec 13 17:56:57.500 INFO [stderr]    |
Dec 13 17:56:57.500 INFO [stderr] 68 |     let x: (i32, &str) = (1, "hello");
Dec 13 17:56:57.500 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 13 17:56:57.500 INFO [stderr] 
Dec 13 17:56:57.501 INFO [stderr] warning: variable `x` is assigned to, but never used
Dec 13 17:56:57.501 INFO [stderr]   --> src/main.rs:70:13
Dec 13 17:56:57.501 INFO [stderr]    |
Dec 13 17:56:57.501 INFO [stderr] 70 |     let mut x = (1, 2);
Dec 13 17:56:57.501 INFO [stderr]    |             ^
Dec 13 17:56:57.501 INFO [stderr]    |
Dec 13 17:56:57.501 INFO [stderr]    = note: consider using `_x` instead
Dec 13 17:56:57.501 INFO [stderr] 
Dec 13 17:56:57.501 INFO [stderr] warning: value assigned to `x` is never read
Dec 13 17:56:57.501 INFO [stderr]   --> src/main.rs:72:5
Dec 13 17:56:57.501 INFO [stderr]    |
Dec 13 17:56:57.501 INFO [stderr] 72 |     x = y;
Dec 13 17:56:57.501 INFO [stderr]    |     ^
Dec 13 17:56:57.501 INFO [stderr]    |
Dec 13 17:56:57.501 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 13 17:56:57.501 INFO [stderr] 
Dec 13 17:56:57.501 INFO [stderr] warning: unused variable: `x`
Dec 13 17:56:57.501 INFO [stderr]   --> src/main.rs:74:10
Dec 13 17:56:57.501 INFO [stderr]    |
Dec 13 17:56:57.501 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 13 17:56:57.501 INFO [stderr]    |          ^ help: consider using `_x` instead
Dec 13 17:56:57.501 INFO [stderr] 
Dec 13 17:56:57.501 INFO [stderr] warning: unused variable: `y`
Dec 13 17:56:57.501 INFO [stderr]   --> src/main.rs:74:13
Dec 13 17:56:57.501 INFO [stderr]    |
Dec 13 17:56:57.501 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 13 17:56:57.501 INFO [stderr]    |             ^ help: consider using `_y` instead
Dec 13 17:56:57.501 INFO [stderr] 
Dec 13 17:56:57.501 INFO [stderr] warning: unused variable: `z`
Dec 13 17:56:57.501 INFO [stderr]   --> src/main.rs:74:16
Dec 13 17:56:57.501 INFO [stderr]    |
Dec 13 17:56:57.501 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 13 17:56:57.501 INFO [stderr]    |                ^ help: consider using `_z` instead
Dec 13 17:56:57.501 INFO [stderr] 
Dec 13 17:56:57.501 INFO [stderr] warning: unused variable: `y`
Dec 13 17:56:57.501 INFO [stderr]   --> src/main.rs:93:9
Dec 13 17:56:57.501 INFO [stderr]    |
Dec 13 17:56:57.501 INFO [stderr] 93 |     let y = if x == 5 { 10 } else { 15 };
Dec 13 17:56:57.501 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 13 17:56:57.501 INFO [stderr] 
Dec 13 17:56:57.503 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:56:57.503 INFO [stderr]   --> src/main.rs:12:9
Dec 13 17:56:57.503 INFO [stderr]    |
Dec 13 17:56:57.503 INFO [stderr] 12 |     let mut d = 5;
Dec 13 17:56:57.503 INFO [stderr]    |         ----^
Dec 13 17:56:57.503 INFO [stderr]    |         |
Dec 13 17:56:57.503 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:56:57.503 INFO [stderr]    |
Dec 13 17:56:57.503 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 13 17:56:57.503 INFO [stderr] 
Dec 13 17:56:57.507 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:56:57.507 INFO [stderr]   --> src/main.rs:53:9
Dec 13 17:56:57.507 INFO [stderr]    |
Dec 13 17:56:57.507 INFO [stderr] 53 |     let mut m = [1, 2, 3];
Dec 13 17:56:57.507 INFO [stderr]    |         ----^
Dec 13 17:56:57.507 INFO [stderr]    |         |
Dec 13 17:56:57.507 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:56:57.507 INFO [stderr] 
Dec 13 17:56:57.511 INFO [stderr] warning: function is never used: `declartion`
Dec 13 17:56:57.511 INFO [stderr]  --> src/main.rs:3:1
Dec 13 17:56:57.511 INFO [stderr]   |
Dec 13 17:56:57.511 INFO [stderr] 3 | fn declartion () {
Dec 13 17:56:57.511 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 13 17:56:57.511 INFO [stderr]   |
Dec 13 17:56:57.511 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 13 17:56:57.511 INFO [stderr] 
Dec 13 17:56:57.511 INFO [stderr] warning: function is never used: `print_number`
Dec 13 17:56:57.511 INFO [stderr]   --> src/main.rs:26:1
Dec 13 17:56:57.511 INFO [stderr]    |
Dec 13 17:56:57.511 INFO [stderr] 26 | fn print_number(x: i32) {
Dec 13 17:56:57.511 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:56:57.511 INFO [stderr] 
Dec 13 17:56:57.511 INFO [stderr] warning: function is never used: `add_one`
Dec 13 17:56:57.511 INFO [stderr]   --> src/main.rs:31:1
Dec 13 17:56:57.511 INFO [stderr]    |
Dec 13 17:56:57.511 INFO [stderr] 31 | fn add_one(x: i32) -> i32 {
Dec 13 17:56:57.511 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:56:57.511 INFO [stderr] 
Dec 13 17:56:57.511 INFO [stderr] warning: function is never used: `primitive`
Dec 13 17:56:57.511 INFO [stderr]   --> src/main.rs:36:1
Dec 13 17:56:57.511 INFO [stderr]    |
Dec 13 17:56:57.511 INFO [stderr] 36 | fn primitive() {
Dec 13 17:56:57.511 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 13 17:56:57.511 INFO [stderr] 
Dec 13 17:56:57.511 INFO [stderr] warning: function is never used: `if_demo`
Dec 13 17:56:57.511 INFO [stderr]   --> src/main.rs:80:1
Dec 13 17:56:57.511 INFO [stderr]    |
Dec 13 17:56:57.511 INFO [stderr] 80 | fn if_demo() {
Dec 13 17:56:57.511 INFO [stderr]    | ^^^^^^^^^^^^
Dec 13 17:56:57.511 INFO [stderr] 
Dec 13 17:56:57.511 INFO [stderr] warning: function is never used: `loop_demo`
Dec 13 17:56:57.511 INFO [stderr]   --> src/main.rs:97:1
Dec 13 17:56:57.511 INFO [stderr]    |
Dec 13 17:56:57.511 INFO [stderr] 97 | fn loop_demo () {
Dec 13 17:56:57.511 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 13 17:56:57.511 INFO [stderr] 
Dec 13 17:56:57.707 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
Dec 13 17:56:57.707 INFO [stderr] su: No module specific data is present
Dec 13 17:56:58.032 INFO running `"docker" "inspect" "5fcfbdb9262c8c9d1ecb62e926d41a5d086cf4a02e1d59a06d28fad55d74d2df"`
Dec 13 17:56:58.215 INFO running `"docker" "rm" "-f" "5fcfbdb9262c8c9d1ecb62e926d41a5d086cf4a02e1d59a06d28fad55d74d2df"`
Dec 13 17:56:58.444 INFO [stdout] 5fcfbdb9262c8c9d1ecb62e926d41a5d086cf4a02e1d59a06d28fad55d74d2df
Dec 13 17:56:58.453 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-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"`
Dec 13 17:56:58.915 INFO [stdout] 6521a9378de0e30b9f3a6e4b82bd2b577b6083fba54ff7bee6a58c3862e2449f
Dec 13 17:56:58.915 INFO running `"docker" "start" "-a" "6521a9378de0e30b9f3a6e4b82bd2b577b6083fba54ff7bee6a58c3862e2449f"`
Dec 13 17:56:59.727 INFO [stderr] usermod: no changes
Dec 13 17:56:59.789 INFO [stderr]    Compiling hello_world v0.1.0 (/source)
Dec 13 17:57:00.270 INFO [stderr] warning: unreachable statement
Dec 13 17:57:00.271 INFO [stderr]    --> src/main.rs:102:5
Dec 13 17:57:00.271 INFO [stderr]     |
Dec 13 17:57:00.271 INFO [stderr] 102 |     let mut x = 5;
Dec 13 17:57:00.271 INFO [stderr]     |     ^^^^^^^^^^^^^^
Dec 13 17:57:00.271 INFO [stderr]     |
Dec 13 17:57:00.287 INFO [stderr]     = note: #[warn(unreachable_code)] on by default
Dec 13 17:57:00.287 INFO [stderr] 
Dec 13 17:57:00.287 INFO [stderr] warning: unused variable: `a`
Dec 13 17:57:00.287 INFO [stderr]  --> src/main.rs:6:9
Dec 13 17:57:00.287 INFO [stderr]   |
Dec 13 17:57:00.287 INFO [stderr] 6 |     let a = 5;
Dec 13 17:57:00.287 INFO [stderr]   |         ^ help: consider using `_a` instead
Dec 13 17:57:00.287 INFO [stderr]   |
Dec 13 17:57:00.287 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 13 17:57:00.287 INFO [stderr] 
Dec 13 17:57:00.287 INFO [stderr] warning: unused variable: `b`
Dec 13 17:57:00.287 INFO [stderr]  --> src/main.rs:8:9
Dec 13 17:57:00.287 INFO [stderr]   |
Dec 13 17:57:00.287 INFO [stderr] 8 |     let b: i32 = 5;
Dec 13 17:57:00.287 INFO [stderr]   |         ^ help: consider using `_b` instead
Dec 13 17:57:00.287 INFO [stderr] 
Dec 13 17:57:00.287 INFO [stderr] warning: unused variable: `c`
Dec 13 17:57:00.287 INFO [stderr]   --> src/main.rs:10:9
Dec 13 17:57:00.287 INFO [stderr]    |
Dec 13 17:57:00.287 INFO [stderr] 10 |     let c: u32 = 5;
Dec 13 17:57:00.287 INFO [stderr]    |         ^ help: consider using `_c` instead
Dec 13 17:57:00.287 INFO [stderr] 
Dec 13 17:57:00.287 INFO [stderr] warning: unused variable: `d`
Dec 13 17:57:00.287 INFO [stderr]   --> src/main.rs:12:13
Dec 13 17:57:00.287 INFO [stderr]    |
Dec 13 17:57:00.287 INFO [stderr] 12 |     let mut d = 5;
Dec 13 17:57:00.287 INFO [stderr]    |             ^ help: consider using `_d` instead
Dec 13 17:57:00.287 INFO [stderr] 
Dec 13 17:57:00.287 INFO [stderr] warning: unused variable: `x`
Dec 13 17:57:00.287 INFO [stderr]   --> src/main.rs:19:10
Dec 13 17:57:00.287 INFO [stderr]    |
Dec 13 17:57:00.289 INFO [stderr] 19 |     let (x, y) = (1, 2);
Dec 13 17:57:00.289 INFO [stderr]    |          ^ help: consider using `_x` instead
Dec 13 17:57:00.289 INFO [stderr] 
Dec 13 17:57:00.289 INFO [stderr] warning: unused variable: `y`
Dec 13 17:57:00.289 INFO [stderr]   --> src/main.rs:19:13
Dec 13 17:57:00.289 INFO [stderr]    |
Dec 13 17:57:00.289 INFO [stderr] 19 |     let (x, y) = (1, 2);
Dec 13 17:57:00.289 INFO [stderr]    |             ^ help: consider using `_y` instead
Dec 13 17:57:00.289 INFO [stderr] 
Dec 13 17:57:00.289 INFO [stderr] warning: unused variable: `x`
Dec 13 17:57:00.289 INFO [stderr]   --> src/main.rs:38:9
Dec 13 17:57:00.289 INFO [stderr]    |
Dec 13 17:57:00.289 INFO [stderr] 38 |     let x = true;
Dec 13 17:57:00.289 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 13 17:57:00.289 INFO [stderr] 
Dec 13 17:57:00.289 INFO [stderr] warning: unused variable: `y`
Dec 13 17:57:00.289 INFO [stderr]   --> src/main.rs:39:9
Dec 13 17:57:00.290 INFO [stderr]    |
Dec 13 17:57:00.290 INFO [stderr] 39 |     let y: bool = false;
Dec 13 17:57:00.290 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 13 17:57:00.290 INFO [stderr] 
Dec 13 17:57:00.290 INFO [stderr] warning: unused variable: `x`
Dec 13 17:57:00.290 INFO [stderr]   --> src/main.rs:44:9
Dec 13 17:57:00.290 INFO [stderr]    |
Dec 13 17:57:00.290 INFO [stderr] 44 |     let x = 'x';
Dec 13 17:57:00.290 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 13 17:57:00.290 INFO [stderr] 
Dec 13 17:57:00.290 INFO [stderr] warning: unused variable: `two_hearts`
Dec 13 17:57:00.290 INFO [stderr]   --> src/main.rs:45:9
Dec 13 17:57:00.290 INFO [stderr]    |
Dec 13 17:57:00.290 INFO [stderr] 45 |     let two_hearts = '¶';
Dec 13 17:57:00.290 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_two_hearts` instead
Dec 13 17:57:00.290 INFO [stderr] 
Dec 13 17:57:00.290 INFO [stderr] warning: unused variable: `x`
Dec 13 17:57:00.290 INFO [stderr]   --> src/main.rs:48:9
Dec 13 17:57:00.290 INFO [stderr]    |
Dec 13 17:57:00.290 INFO [stderr] 48 |     let x = 42; // xはi32型を持つ
Dec 13 17:57:00.290 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 13 17:57:00.290 INFO [stderr] 
Dec 13 17:57:00.290 INFO [stderr] warning: unused variable: `y`
Dec 13 17:57:00.290 INFO [stderr]   --> src/main.rs:49:9
Dec 13 17:57:00.290 INFO [stderr]    |
Dec 13 17:57:00.290 INFO [stderr] 49 |     let y = 1.0; // yはf64型を持つ
Dec 13 17:57:00.290 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 13 17:57:00.290 INFO [stderr] 
Dec 13 17:57:00.290 INFO [stderr] warning: unused variable: `a`
Dec 13 17:57:00.290 INFO [stderr]   --> src/main.rs:52:9
Dec 13 17:57:00.290 INFO [stderr]    |
Dec 13 17:57:00.290 INFO [stderr] 52 |     let a = [0, 1, 2, 3, 4];
Dec 13 17:57:00.290 INFO [stderr]    |         ^ help: consider using `_a` instead
Dec 13 17:57:00.290 INFO [stderr] 
Dec 13 17:57:00.290 INFO [stderr] warning: unused variable: `m`
Dec 13 17:57:00.290 INFO [stderr]   --> src/main.rs:53:13
Dec 13 17:57:00.290 INFO [stderr]    |
Dec 13 17:57:00.290 INFO [stderr] 53 |     let mut m = [1, 2, 3];
Dec 13 17:57:00.290 INFO [stderr]    |             ^ help: consider using `_m` instead
Dec 13 17:57:00.290 INFO [stderr] 
Dec 13 17:57:00.290 INFO [stderr] warning: unused variable: `complete`
Dec 13 17:57:00.290 INFO [stderr]   --> src/main.rs:60:9
Dec 13 17:57:00.290 INFO [stderr]    |
Dec 13 17:57:00.290 INFO [stderr] 60 |     let complete = &a[..];
Dec 13 17:57:00.290 INFO [stderr]    |         ^^^^^^^^ help: consider using `_complete` instead
Dec 13 17:57:00.290 INFO [stderr] 
Dec 13 17:57:00.290 INFO [stderr] warning: unused variable: `middle`
Dec 13 17:57:00.295 INFO [stderr]   --> src/main.rs:62:9
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr] 62 |     let middle = &a[1..4];
Dec 13 17:57:00.295 INFO [stderr]    |         ^^^^^^ help: consider using `_middle` instead
Dec 13 17:57:00.295 INFO [stderr] 
Dec 13 17:57:00.295 INFO [stderr] warning: unused variable: `x`
Dec 13 17:57:00.295 INFO [stderr]   --> src/main.rs:67:9
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr] 67 |     let x = (1, "hello");
Dec 13 17:57:00.295 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 13 17:57:00.295 INFO [stderr] 
Dec 13 17:57:00.295 INFO [stderr] warning: unused variable: `x`
Dec 13 17:57:00.295 INFO [stderr]   --> src/main.rs:68:9
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr] 68 |     let x: (i32, &str) = (1, "hello");
Dec 13 17:57:00.295 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 13 17:57:00.295 INFO [stderr] 
Dec 13 17:57:00.295 INFO [stderr] warning: variable `x` is assigned to, but never used
Dec 13 17:57:00.295 INFO [stderr]   --> src/main.rs:70:13
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr] 70 |     let mut x = (1, 2);
Dec 13 17:57:00.295 INFO [stderr]    |             ^
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr]    = note: consider using `_x` instead
Dec 13 17:57:00.295 INFO [stderr] 
Dec 13 17:57:00.295 INFO [stderr] warning: value assigned to `x` is never read
Dec 13 17:57:00.295 INFO [stderr]   --> src/main.rs:72:5
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr] 72 |     x = y;
Dec 13 17:57:00.295 INFO [stderr]    |     ^
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 13 17:57:00.295 INFO [stderr] 
Dec 13 17:57:00.295 INFO [stderr] warning: unused variable: `x`
Dec 13 17:57:00.295 INFO [stderr]   --> src/main.rs:74:10
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 13 17:57:00.295 INFO [stderr]    |          ^ help: consider using `_x` instead
Dec 13 17:57:00.295 INFO [stderr] 
Dec 13 17:57:00.295 INFO [stderr] warning: unused variable: `y`
Dec 13 17:57:00.295 INFO [stderr]   --> src/main.rs:74:13
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 13 17:57:00.295 INFO [stderr]    |             ^ help: consider using `_y` instead
Dec 13 17:57:00.295 INFO [stderr] 
Dec 13 17:57:00.295 INFO [stderr] warning: unused variable: `z`
Dec 13 17:57:00.295 INFO [stderr]   --> src/main.rs:74:16
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr] 74 |     let (x, y, z) = (1, 2, 3);
Dec 13 17:57:00.295 INFO [stderr]    |                ^ help: consider using `_z` instead
Dec 13 17:57:00.295 INFO [stderr] 
Dec 13 17:57:00.295 INFO [stderr] warning: unused variable: `y`
Dec 13 17:57:00.295 INFO [stderr]   --> src/main.rs:93:9
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr] 93 |     let y = if x == 5 { 10 } else { 15 };
Dec 13 17:57:00.295 INFO [stderr]    |         ^ help: consider using `_y` instead
Dec 13 17:57:00.295 INFO [stderr] 
Dec 13 17:57:00.295 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:57:00.295 INFO [stderr]   --> src/main.rs:12:9
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.295 INFO [stderr] 12 |     let mut d = 5;
Dec 13 17:57:00.295 INFO [stderr]    |         ----^
Dec 13 17:57:00.295 INFO [stderr]    |         |
Dec 13 17:57:00.295 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:57:00.295 INFO [stderr]    |
Dec 13 17:57:00.296 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 13 17:57:00.296 INFO [stderr] 
Dec 13 17:57:00.302 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:57:00.303 INFO [stderr]   --> src/main.rs:53:9
Dec 13 17:57:00.303 INFO [stderr]    |
Dec 13 17:57:00.303 INFO [stderr] 53 |     let mut m = [1, 2, 3];
Dec 13 17:57:00.303 INFO [stderr]    |         ----^
Dec 13 17:57:00.303 INFO [stderr]    |         |
Dec 13 17:57:00.303 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:57:00.303 INFO [stderr] 
Dec 13 17:57:00.306 INFO [stderr] warning: function is never used: `declartion`
Dec 13 17:57:00.307 INFO [stderr]  --> src/main.rs:3:1
Dec 13 17:57:00.307 INFO [stderr]   |
Dec 13 17:57:00.307 INFO [stderr] 3 | fn declartion () {
Dec 13 17:57:00.307 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 13 17:57:00.307 INFO [stderr]   |
Dec 13 17:57:00.307 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 13 17:57:00.307 INFO [stderr] 
Dec 13 17:57:00.307 INFO [stderr] warning: function is never used: `print_number`
Dec 13 17:57:00.307 INFO [stderr]   --> src/main.rs:26:1
Dec 13 17:57:00.307 INFO [stderr]    |
Dec 13 17:57:00.307 INFO [stderr] 26 | fn print_number(x: i32) {
Dec 13 17:57:00.307 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:57:00.307 INFO [stderr] 
Dec 13 17:57:00.307 INFO [stderr] warning: function is never used: `add_one`
Dec 13 17:57:00.307 INFO [stderr]   --> src/main.rs:31:1
Dec 13 17:57:00.307 INFO [stderr]    |
Dec 13 17:57:00.307 INFO [stderr] 31 | fn add_one(x: i32) -> i32 {
Dec 13 17:57:00.307 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:57:00.307 INFO [stderr] 
Dec 13 17:57:00.307 INFO [stderr] warning: function is never used: `primitive`
Dec 13 17:57:00.307 INFO [stderr]   --> src/main.rs:36:1
Dec 13 17:57:00.307 INFO [stderr]    |
Dec 13 17:57:00.307 INFO [stderr] 36 | fn primitive() {
Dec 13 17:57:00.307 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 13 17:57:00.307 INFO [stderr] 
Dec 13 17:57:00.307 INFO [stderr] warning: function is never used: `if_demo`
Dec 13 17:57:00.307 INFO [stderr]   --> src/main.rs:80:1
Dec 13 17:57:00.307 INFO [stderr]    |
Dec 13 17:57:00.307 INFO [stderr] 80 | fn if_demo() {
Dec 13 17:57:00.307 INFO [stderr]    | ^^^^^^^^^^^^
Dec 13 17:57:00.314 INFO [stderr] 
Dec 13 17:57:00.315 INFO [stderr] warning: function is never used: `loop_demo`
Dec 13 17:57:00.315 INFO [stderr]   --> src/main.rs:97:1
Dec 13 17:57:00.315 INFO [stderr]    |
Dec 13 17:57:00.315 INFO [stderr] 97 | fn loop_demo () {
Dec 13 17:57:00.315 INFO [stderr]    | ^^^^^^^^^^^^^^^
Dec 13 17:57:00.315 INFO [stderr] 
Dec 13 17:57:00.634 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
Dec 13 17:57:00.636 INFO [stderr] su: No module specific data is present
Dec 13 17:57:00.937 INFO running `"docker" "inspect" "6521a9378de0e30b9f3a6e4b82bd2b577b6083fba54ff7bee6a58c3862e2449f"`
Dec 13 17:57:01.058 INFO running `"docker" "rm" "-f" "6521a9378de0e30b9f3a6e4b82bd2b577b6083fba54ff7bee6a58c3862e2449f"`
Dec 13 17:57:01.151 INFO [stdout] 6521a9378de0e30b9f3a6e4b82bd2b577b6083fba54ff7bee6a58c3862e2449f
Dec 13 17:57:01.156 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen" "-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"`
Dec 13 17:57:01.394 INFO [stdout] 1ba87b3683ceca65f6580467ea23df421c4b31a3b269892f8a3fb2f45a4cf10b
Dec 13 17:57:01.397 INFO running `"docker" "start" "-a" "1ba87b3683ceca65f6580467ea23df421c4b31a3b269892f8a3fb2f45a4cf10b"`
Dec 13 17:57:02.471 INFO [stderr] usermod: no changes
Dec 13 17:57:02.519 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
Dec 13 17:57:02.531 INFO [stdout] 
Dec 13 17:57:02.531 INFO [stdout] running 0 tests
Dec 13 17:57:02.531 INFO [stdout] 
Dec 13 17:57:02.531 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 17:57:02.531 INFO [stdout] 
Dec 13 17:57:02.531 INFO [stderr]      Running /target/debug/deps/hello_world-62557c07a94cd486
Dec 13 17:57:02.532 INFO [stderr] su: No module specific data is present
Dec 13 17:57:02.865 INFO running `"docker" "inspect" "1ba87b3683ceca65f6580467ea23df421c4b31a3b269892f8a3fb2f45a4cf10b"`
Dec 13 17:57:02.937 INFO running `"docker" "rm" "-f" "1ba87b3683ceca65f6580467ea23df421c4b31a3b269892f8a3fb2f45a4cf10b"`
Dec 13 17:57:03.021 INFO [stdout] 1ba87b3683ceca65f6580467ea23df421c4b31a3b269892f8a3fb2f45a4cf10b