Dec 18 03:56:17.466 INFO checking aochagavia/rust-syntax-cheat-sheet against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 03:56:17.466 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/aochagavia/rust-syntax-cheat-sheet:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 03:56:17.793 INFO [stdout] 6d89a4f4ec675db3fcb1f0d7464c36b75fc2a759107f4531d2d20c7f6fdafbfc
Dec 18 03:56:17.795 INFO running `"docker" "start" "-a" "6d89a4f4ec675db3fcb1f0d7464c36b75fc2a759107f4531d2d20c7f6fdafbfc"`
Dec 18 03:56:18.451 INFO [stderr]     Checking syntax v0.1.0 (/opt/crater/workdir)
Dec 18 03:56:18.768 INFO [stderr] warning: unused variable: `x`
Dec 18 03:56:18.768 INFO [stderr]   --> src/main.rs:32:9
Dec 18 03:56:18.769 INFO [stderr]    |
Dec 18 03:56:18.769 INFO [stderr] 32 |     let x: i32 = 42;
Dec 18 03:56:18.769 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 18 03:56:18.769 INFO [stderr]    |
Dec 18 03:56:18.769 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: unused variable: `implicit_x`
Dec 18 03:56:18.769 INFO [stderr]   --> src/main.rs:41:9
Dec 18 03:56:18.769 INFO [stderr]    |
Dec 18 03:56:18.769 INFO [stderr] 41 |     let implicit_x = 1;
Dec 18 03:56:18.769 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_implicit_x` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: unused variable: `implicit_f`
Dec 18 03:56:18.769 INFO [stderr]   --> src/main.rs:42:9
Dec 18 03:56:18.769 INFO [stderr]    |
Dec 18 03:56:18.769 INFO [stderr] 42 |     let implicit_f = 1.3;
Dec 18 03:56:18.769 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_implicit_f` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: variable `mutable` is assigned to, but never used
Dec 18 03:56:18.769 INFO [stderr]   --> src/main.rs:45:13
Dec 18 03:56:18.769 INFO [stderr]    |
Dec 18 03:56:18.769 INFO [stderr] 45 |     let mut mutable = 1;
Dec 18 03:56:18.769 INFO [stderr]    |             ^^^^^^^
Dec 18 03:56:18.769 INFO [stderr]    |
Dec 18 03:56:18.769 INFO [stderr]    = note: consider using `_mutable` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: value assigned to `mutable` is never read
Dec 18 03:56:18.769 INFO [stderr]   --> src/main.rs:47:5
Dec 18 03:56:18.769 INFO [stderr]    |
Dec 18 03:56:18.769 INFO [stderr] 47 |     mutable += 2;
Dec 18 03:56:18.769 INFO [stderr]    |     ^^^^^^^
Dec 18 03:56:18.769 INFO [stderr]    |
Dec 18 03:56:18.769 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: unused variable: `four_ints`
Dec 18 03:56:18.769 INFO [stderr]   --> src/main.rs:71:9
Dec 18 03:56:18.769 INFO [stderr]    |
Dec 18 03:56:18.769 INFO [stderr] 71 |     let four_ints: [i32; 4] = [1, 2, 3, 4];
Dec 18 03:56:18.769 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_four_ints` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: unused variable: `origin`
Dec 18 03:56:18.769 INFO [stderr]    --> src/main.rs:108:9
Dec 18 03:56:18.769 INFO [stderr]     |
Dec 18 03:56:18.769 INFO [stderr] 108 |     let origin = Point { x: 0, y: 0 };
Dec 18 03:56:18.769 INFO [stderr]     |         ^^^^^^ help: consider using `_origin` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: unused variable: `origin2`
Dec 18 03:56:18.769 INFO [stderr]    --> src/main.rs:113:9
Dec 18 03:56:18.769 INFO [stderr]     |
Dec 18 03:56:18.769 INFO [stderr] 113 |     let origin2 = Point2(0, 0);
Dec 18 03:56:18.769 INFO [stderr]     |         ^^^^^^^ help: consider using `_origin2` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: unused variable: `up`
Dec 18 03:56:18.769 INFO [stderr]    --> src/main.rs:144:9
Dec 18 03:56:18.769 INFO [stderr]     |
Dec 18 03:56:18.769 INFO [stderr] 144 |     let up = Direction::Up;
Dec 18 03:56:18.769 INFO [stderr]     |         ^^ help: consider using `_up` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: unused variable: `two`
Dec 18 03:56:18.769 INFO [stderr]    --> src/main.rs:152:9
Dec 18 03:56:18.769 INFO [stderr]     |
Dec 18 03:56:18.769 INFO [stderr] 152 |     let two: OptionalI32 = OptionalI32::AnI32(2);
Dec 18 03:56:18.769 INFO [stderr]     |         ^^^ help: consider using `_two` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: unused variable: `nothing`
Dec 18 03:56:18.769 INFO [stderr]    --> src/main.rs:153:9
Dec 18 03:56:18.769 INFO [stderr]     |
Dec 18 03:56:18.769 INFO [stderr] 153 |     let nothing = OptionalI32::Nothing;
Dec 18 03:56:18.769 INFO [stderr]     |         ^^^^^^^ help: consider using `_nothing` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: unused variable: `value`
Dec 18 03:56:18.769 INFO [stderr]    --> src/main.rs:266:9
Dec 18 03:56:18.769 INFO [stderr]     |
Dec 18 03:56:18.769 INFO [stderr] 266 |     let value = if true { "good" } else { "bad" };
Dec 18 03:56:18.769 INFO [stderr]     |         ^^^^^ help: consider using `_value` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.769 INFO [stderr] warning: unused variable: `another_ref_var`
Dec 18 03:56:18.769 INFO [stderr]    --> src/main.rs:296:9
Dec 18 03:56:18.769 INFO [stderr]     |
Dec 18 03:56:18.769 INFO [stderr] 296 |     let another_ref_var = &var;
Dec 18 03:56:18.769 INFO [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_another_ref_var` instead
Dec 18 03:56:18.769 INFO [stderr] 
Dec 18 03:56:18.804 INFO [stderr] warning: variable does not need to be mutable
Dec 18 03:56:18.804 INFO [stderr]    --> src/main.rs:294:9
Dec 18 03:56:18.804 INFO [stderr]     |
Dec 18 03:56:18.804 INFO [stderr] 294 |     let mut var = 4;
Dec 18 03:56:18.804 INFO [stderr]     |         ----^^^
Dec 18 03:56:18.804 INFO [stderr]     |         |
Dec 18 03:56:18.804 INFO [stderr]     |         help: remove this `mut`
Dec 18 03:56:18.804 INFO [stderr]     |
Dec 18 03:56:18.804 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 03:56:18.804 INFO [stderr] 
Dec 18 03:56:18.804 INFO [stderr] warning: function is never used: `add_ints`
Dec 18 03:56:18.805 INFO [stderr]   --> src/main.rs:17:1
Dec 18 03:56:18.805 INFO [stderr]    |
Dec 18 03:56:18.805 INFO [stderr] 17 | fn add_ints(x: i32, y: i32) -> i32 {
Dec 18 03:56:18.805 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:56:18.805 INFO [stderr]    |
Dec 18 03:56:18.805 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 03:56:18.805 INFO [stderr] 
Dec 18 03:56:18.805 INFO [stderr] warning: function is never used: `add_uints`
Dec 18 03:56:18.805 INFO [stderr]   --> src/main.rs:23:1
Dec 18 03:56:18.805 INFO [stderr]    |
Dec 18 03:56:18.805 INFO [stderr] 23 | fn add_uints(x: i32, y: i32) -> i32 {
Dec 18 03:56:18.805 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:56:18.805 INFO [stderr] 
Dec 18 03:56:18.805 INFO [stderr] warning: variant is never constructed: `Left`
Dec 18 03:56:18.805 INFO [stderr]    --> src/main.rs:138:9
Dec 18 03:56:18.805 INFO [stderr]     |
Dec 18 03:56:18.805 INFO [stderr] 138 |         Left,
Dec 18 03:56:18.805 INFO [stderr]     |         ^^^^
Dec 18 03:56:18.805 INFO [stderr] 
Dec 18 03:56:18.805 INFO [stderr] warning: variant is never constructed: `Right`
Dec 18 03:56:18.805 INFO [stderr]    --> src/main.rs:139:9
Dec 18 03:56:18.805 INFO [stderr]     |
Dec 18 03:56:18.805 INFO [stderr] 139 |         Right,
Dec 18 03:56:18.805 INFO [stderr]     |         ^^^^^
Dec 18 03:56:18.805 INFO [stderr] 
Dec 18 03:56:18.805 INFO [stderr] warning: variant is never constructed: `Down`
Dec 18 03:56:18.805 INFO [stderr]    --> src/main.rs:141:9
Dec 18 03:56:18.805 INFO [stderr]     |
Dec 18 03:56:18.805 INFO [stderr] 141 |         Down,
Dec 18 03:56:18.805 INFO [stderr]     |         ^^^^
Dec 18 03:56:18.805 INFO [stderr] 
Dec 18 03:56:18.805 INFO [stderr] warning: method is never used: `new`
Dec 18 03:56:18.805 INFO [stderr]    --> src/main.rs:158:9
Dec 18 03:56:18.805 INFO [stderr]     |
Dec 18 03:56:18.805 INFO [stderr] 158 |         fn new(x: i32) -> OptionalI32 {
Dec 18 03:56:18.805 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:56:18.805 INFO [stderr] 
Dec 18 03:56:18.805 INFO [stderr] warning: struct is never constructed: `Foo`
Dec 18 03:56:18.805 INFO [stderr]    --> src/main.rs:211:5
Dec 18 03:56:18.805 INFO [stderr]     |
Dec 18 03:56:18.805 INFO [stderr] 211 |     struct Foo<T> {
Dec 18 03:56:18.805 INFO [stderr]     |     ^^^^^^^^^^^^^
Dec 18 03:56:18.805 INFO [stderr] 
Dec 18 03:56:18.805 INFO [stderr] warning: function is never used: `identity`
Dec 18 03:56:18.805 INFO [stderr]    --> src/main.rs:215:5
Dec 18 03:56:18.805 INFO [stderr]     |
Dec 18 03:56:18.805 INFO [stderr] 215 |     fn identity<T>(x: T) -> T {
Dec 18 03:56:18.805 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:56:18.805 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `x`
Dec 18 03:56:18.904 INFO [stderr]   --> src/main.rs:32:9
Dec 18 03:56:18.904 INFO [stderr]    |
Dec 18 03:56:18.904 INFO [stderr] 32 |     let x: i32 = 42;
Dec 18 03:56:18.904 INFO [stderr]    |         ^ help: consider using `_x` instead
Dec 18 03:56:18.904 INFO [stderr]    |
Dec 18 03:56:18.904 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `implicit_x`
Dec 18 03:56:18.904 INFO [stderr]   --> src/main.rs:41:9
Dec 18 03:56:18.904 INFO [stderr]    |
Dec 18 03:56:18.904 INFO [stderr] 41 |     let implicit_x = 1;
Dec 18 03:56:18.904 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_implicit_x` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `implicit_f`
Dec 18 03:56:18.904 INFO [stderr]   --> src/main.rs:42:9
Dec 18 03:56:18.904 INFO [stderr]    |
Dec 18 03:56:18.904 INFO [stderr] 42 |     let implicit_f = 1.3;
Dec 18 03:56:18.904 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_implicit_f` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: variable `mutable` is assigned to, but never used
Dec 18 03:56:18.904 INFO [stderr]   --> src/main.rs:45:13
Dec 18 03:56:18.904 INFO [stderr]    |
Dec 18 03:56:18.904 INFO [stderr] 45 |     let mut mutable = 1;
Dec 18 03:56:18.904 INFO [stderr]    |             ^^^^^^^
Dec 18 03:56:18.904 INFO [stderr]    |
Dec 18 03:56:18.904 INFO [stderr]    = note: consider using `_mutable` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: value assigned to `mutable` is never read
Dec 18 03:56:18.904 INFO [stderr]   --> src/main.rs:47:5
Dec 18 03:56:18.904 INFO [stderr]    |
Dec 18 03:56:18.904 INFO [stderr] 47 |     mutable += 2;
Dec 18 03:56:18.904 INFO [stderr]    |     ^^^^^^^
Dec 18 03:56:18.904 INFO [stderr]    |
Dec 18 03:56:18.904 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `four_ints`
Dec 18 03:56:18.904 INFO [stderr]   --> src/main.rs:71:9
Dec 18 03:56:18.904 INFO [stderr]    |
Dec 18 03:56:18.904 INFO [stderr] 71 |     let four_ints: [i32; 4] = [1, 2, 3, 4];
Dec 18 03:56:18.904 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_four_ints` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `origin`
Dec 18 03:56:18.904 INFO [stderr]    --> src/main.rs:108:9
Dec 18 03:56:18.904 INFO [stderr]     |
Dec 18 03:56:18.904 INFO [stderr] 108 |     let origin = Point { x: 0, y: 0 };
Dec 18 03:56:18.904 INFO [stderr]     |         ^^^^^^ help: consider using `_origin` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `origin2`
Dec 18 03:56:18.904 INFO [stderr]    --> src/main.rs:113:9
Dec 18 03:56:18.904 INFO [stderr]     |
Dec 18 03:56:18.904 INFO [stderr] 113 |     let origin2 = Point2(0, 0);
Dec 18 03:56:18.904 INFO [stderr]     |         ^^^^^^^ help: consider using `_origin2` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `up`
Dec 18 03:56:18.904 INFO [stderr]    --> src/main.rs:144:9
Dec 18 03:56:18.904 INFO [stderr]     |
Dec 18 03:56:18.904 INFO [stderr] 144 |     let up = Direction::Up;
Dec 18 03:56:18.904 INFO [stderr]     |         ^^ help: consider using `_up` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `two`
Dec 18 03:56:18.904 INFO [stderr]    --> src/main.rs:152:9
Dec 18 03:56:18.904 INFO [stderr]     |
Dec 18 03:56:18.904 INFO [stderr] 152 |     let two: OptionalI32 = OptionalI32::AnI32(2);
Dec 18 03:56:18.904 INFO [stderr]     |         ^^^ help: consider using `_two` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `nothing`
Dec 18 03:56:18.904 INFO [stderr]    --> src/main.rs:153:9
Dec 18 03:56:18.904 INFO [stderr]     |
Dec 18 03:56:18.904 INFO [stderr] 153 |     let nothing = OptionalI32::Nothing;
Dec 18 03:56:18.904 INFO [stderr]     |         ^^^^^^^ help: consider using `_nothing` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `value`
Dec 18 03:56:18.904 INFO [stderr]    --> src/main.rs:266:9
Dec 18 03:56:18.904 INFO [stderr]     |
Dec 18 03:56:18.904 INFO [stderr] 266 |     let value = if true { "good" } else { "bad" };
Dec 18 03:56:18.904 INFO [stderr]     |         ^^^^^ help: consider using `_value` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.904 INFO [stderr] warning: unused variable: `another_ref_var`
Dec 18 03:56:18.904 INFO [stderr]    --> src/main.rs:296:9
Dec 18 03:56:18.904 INFO [stderr]     |
Dec 18 03:56:18.904 INFO [stderr] 296 |     let another_ref_var = &var;
Dec 18 03:56:18.904 INFO [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_another_ref_var` instead
Dec 18 03:56:18.904 INFO [stderr] 
Dec 18 03:56:18.928 INFO [stderr] warning: variable does not need to be mutable
Dec 18 03:56:18.928 INFO [stderr]    --> src/main.rs:294:9
Dec 18 03:56:18.928 INFO [stderr]     |
Dec 18 03:56:18.928 INFO [stderr] 294 |     let mut var = 4;
Dec 18 03:56:18.928 INFO [stderr]     |         ----^^^
Dec 18 03:56:18.928 INFO [stderr]     |         |
Dec 18 03:56:18.928 INFO [stderr]     |         help: remove this `mut`
Dec 18 03:56:18.928 INFO [stderr]     |
Dec 18 03:56:18.928 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 03:56:18.928 INFO [stderr] 
Dec 18 03:56:18.928 INFO [stderr] warning: function is never used: `add_ints`
Dec 18 03:56:18.928 INFO [stderr]   --> src/main.rs:17:1
Dec 18 03:56:18.928 INFO [stderr]    |
Dec 18 03:56:18.928 INFO [stderr] 17 | fn add_ints(x: i32, y: i32) -> i32 {
Dec 18 03:56:18.928 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:56:18.928 INFO [stderr]    |
Dec 18 03:56:18.928 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 03:56:18.928 INFO [stderr] 
Dec 18 03:56:18.928 INFO [stderr] warning: function is never used: `add_uints`
Dec 18 03:56:18.928 INFO [stderr]   --> src/main.rs:23:1
Dec 18 03:56:18.928 INFO [stderr]    |
Dec 18 03:56:18.928 INFO [stderr] 23 | fn add_uints(x: i32, y: i32) -> i32 {
Dec 18 03:56:18.928 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:56:18.928 INFO [stderr] 
Dec 18 03:56:18.952 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
Dec 18 03:56:19.532 INFO running `"docker" "inspect" "6d89a4f4ec675db3fcb1f0d7464c36b75fc2a759107f4531d2d20c7f6fdafbfc"`
Dec 18 03:56:19.676 INFO running `"docker" "rm" "-f" "6d89a4f4ec675db3fcb1f0d7464c36b75fc2a759107f4531d2d20c7f6fdafbfc"`
Dec 18 03:56:19.922 INFO [stdout] 6d89a4f4ec675db3fcb1f0d7464c36b75fc2a759107f4531d2d20c7f6fdafbfc