[INFO] updating cached repository aochagavia/rust-syntax-cheat-sheet
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/aochagavia/rust-syntax-cheat-sheet
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/aochagavia/rust-syntax-cheat-sheet" "work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/aochagavia/rust-syntax-cheat-sheet"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/aochagavia/rust-syntax-cheat-sheet'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/aochagavia/rust-syntax-cheat-sheet" "work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/aochagavia/rust-syntax-cheat-sheet"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/aochagavia/rust-syntax-cheat-sheet'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 61962ddbc2996b1dcbed8f58150e420058f1ddf9
[INFO] sha for GitHub repo aochagavia/rust-syntax-cheat-sheet: 61962ddbc2996b1dcbed8f58150e420058f1ddf9
[INFO] validating manifest of aochagavia/rust-syntax-cheat-sheet on toolchain master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of aochagavia/rust-syntax-cheat-sheet on toolchain try#29640c57b5f92febba0e40c50cb863c9a7ede51d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing aochagavia/rust-syntax-cheat-sheet
[INFO] finished frobbing aochagavia/rust-syntax-cheat-sheet
[INFO] frobbed toml for aochagavia/rust-syntax-cheat-sheet written to work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/aochagavia/rust-syntax-cheat-sheet/Cargo.toml
[INFO] started frobbing aochagavia/rust-syntax-cheat-sheet
[INFO] finished frobbing aochagavia/rust-syntax-cheat-sheet
[INFO] frobbed toml for aochagavia/rust-syntax-cheat-sheet written to work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/aochagavia/rust-syntax-cheat-sheet/Cargo.toml
[INFO] crate aochagavia/rust-syntax-cheat-sheet has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking aochagavia/rust-syntax-cheat-sheet against try#29640c57b5f92febba0e40c50cb863c9a7ede51d for pr-57745
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57745/worker-2/try#29640c57b5f92febba0e40c50cb863c9a7ede51d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/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" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0ac4446307545fa3735d3b879724d23f58dee31f0fa4779a06268f6b5bc7affb
[INFO] running `"docker" "start" "-a" "0ac4446307545fa3735d3b879724d23f58dee31f0fa4779a06268f6b5bc7affb"`
[INFO] [stderr]     Checking syntax v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let x: i32 = 42;
[INFO] [stderr]    |         ^ help: consider using `_x` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `implicit_x`
[INFO] [stderr]   --> src/main.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let implicit_x = 1;
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider using `_implicit_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `implicit_f`
[INFO] [stderr]   --> src/main.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let implicit_f = 1.3;
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider using `_implicit_f` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable `mutable` is assigned to, but never used
[INFO] [stderr]   --> src/main.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let mut mutable = 1;
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_mutable` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `mutable` is never read
[INFO] [stderr]   --> src/main.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     mutable += 2;
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `four_ints`
[INFO] [stderr]   --> src/main.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |     let four_ints: [i32; 4] = [1, 2, 3, 4];
[INFO] [stderr]    |         ^^^^^^^^^ help: consider using `_four_ints` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `origin`
[INFO] [stderr]    --> src/main.rs:108:9
[INFO] [stderr]     |
[INFO] [stderr] 108 |     let origin = Point { x: 0, y: 0 };
[INFO] [stderr]     |         ^^^^^^ help: consider using `_origin` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `origin2`
[INFO] [stderr]    --> src/main.rs:113:9
[INFO] [stderr]     |
[INFO] [stderr] 113 |     let origin2 = Point2(0, 0);
[INFO] [stderr]     |         ^^^^^^^ help: consider using `_origin2` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `up`
[INFO] [stderr]    --> src/main.rs:144:9
[INFO] [stderr]     |
[INFO] [stderr] 144 |     let up = Direction::Up;
[INFO] [stderr]     |         ^^ help: consider using `_up` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `two`
[INFO] [stderr]    --> src/main.rs:152:9
[INFO] [stderr]     |
[INFO] [stderr] 152 |     let two: OptionalI32 = OptionalI32::AnI32(2);
[INFO] [stderr]     |         ^^^ help: consider using `_two` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `nothing`
[INFO] [stderr]    --> src/main.rs:153:9
[INFO] [stderr]     |
[INFO] [stderr] 153 |     let nothing = OptionalI32::Nothing;
[INFO] [stderr]     |         ^^^^^^^ help: consider using `_nothing` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/main.rs:266:9
[INFO] [stderr]     |
[INFO] [stderr] 266 |     let value = if true { "good" } else { "bad" };
[INFO] [stderr]     |         ^^^^^ help: consider using `_value` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `another_ref_var`
[INFO] [stderr]    --> src/main.rs:296:9
[INFO] [stderr]     |
[INFO] [stderr] 296 |     let another_ref_var = &var;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_another_ref_var` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:294:9
[INFO] [stderr]     |
[INFO] [stderr] 294 |     let mut var = 4;
[INFO] [stderr]     |         ----^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add_ints`
[INFO] [stderr]   --> src/main.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn add_ints(x: i32, y: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add_uints`
[INFO] [stderr]   --> src/main.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn add_uints(x: i32, y: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let x: i32 = 42;
[INFO] [stderr]    |         ^ help: consider using `_x` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `implicit_x`
[INFO] [stderr]   --> src/main.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let implicit_x = 1;
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider using `_implicit_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `implicit_f`
[INFO] [stderr]   --> src/main.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let implicit_f = 1.3;
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider using `_implicit_f` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable `mutable` is assigned to, but never used
[INFO] [stderr]   --> src/main.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let mut mutable = 1;
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_mutable` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `mutable` is never read
[INFO] [stderr]   --> src/main.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     mutable += 2;
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `four_ints`
[INFO] [stderr]   --> src/main.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |     let four_ints: [i32; 4] = [1, 2, 3, 4];
[INFO] [stderr]    |         ^^^^^^^^^ help: consider using `_four_ints` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `origin`
[INFO] [stderr]    --> src/main.rs:108:9
[INFO] [stderr]     |
[INFO] [stderr] 108 |     let origin = Point { x: 0, y: 0 };
[INFO] [stderr]     |         ^^^^^^ help: consider using `_origin` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `origin2`
[INFO] [stderr]    --> src/main.rs:113:9
[INFO] [stderr]     |
[INFO] [stderr] 113 |     let origin2 = Point2(0, 0);
[INFO] [stderr]     |         ^^^^^^^ help: consider using `_origin2` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `up`
[INFO] [stderr]    --> src/main.rs:144:9
[INFO] [stderr]     |
[INFO] [stderr] 144 |     let up = Direction::Up;
[INFO] [stderr]     |         ^^ help: consider using `_up` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `two`
[INFO] [stderr]    --> src/main.rs:152:9
[INFO] [stderr]     |
[INFO] [stderr] 152 |     let two: OptionalI32 = OptionalI32::AnI32(2);
[INFO] [stderr]     |         ^^^ help: consider using `_two` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `nothing`
[INFO] [stderr]    --> src/main.rs:153:9
[INFO] [stderr]     |
[INFO] [stderr] 153 |     let nothing = OptionalI32::Nothing;
[INFO] [stderr]     |         ^^^^^^^ help: consider using `_nothing` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/main.rs:266:9
[INFO] [stderr]     |
[INFO] [stderr] 266 |     let value = if true { "good" } else { "bad" };
[INFO] [stderr]     |         ^^^^^ help: consider using `_value` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `another_ref_var`
[INFO] [stderr]    --> src/main.rs:296:9
[INFO] [stderr]     |
[INFO] [stderr] 296 |     let another_ref_var = &var;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ help: consider using `_another_ref_var` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:294:9
[INFO] [stderr]     |
[INFO] [stderr] 294 |     let mut var = 4;
[INFO] [stderr]     |         ----^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add_ints`
[INFO] [stderr]   --> src/main.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn add_ints(x: i32, y: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add_uints`
[INFO] [stderr]   --> src/main.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn add_uints(x: i32, y: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Left`
[INFO] [stderr]    --> src/main.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 |         Left,
[INFO] [stderr]     |         ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Right`
[INFO] [stderr]    --> src/main.rs:139:9
[INFO] [stderr]     |
[INFO] [stderr] 139 |         Right,
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Down`
[INFO] [stderr]    --> src/main.rs:141:9
[INFO] [stderr]     |
[INFO] [stderr] 141 |         Down,
[INFO] [stderr]     |         ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/main.rs:158:9
[INFO] [stderr]     |
[INFO] [stderr] 158 |         fn new(x: i32) -> OptionalI32 {
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Foo`
[INFO] [stderr]    --> src/main.rs:211:5
[INFO] [stderr]     |
[INFO] [stderr] 211 |     struct Foo<T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `identity`
[INFO] [stderr]    --> src/main.rs:215:5
[INFO] [stderr]     |
[INFO] [stderr] 215 |     fn identity<T>(x: T) -> T {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "0ac4446307545fa3735d3b879724d23f58dee31f0fa4779a06268f6b5bc7affb"`
[INFO] running `"docker" "rm" "-f" "0ac4446307545fa3735d3b879724d23f58dee31f0fa4779a06268f6b5bc7affb"`
[INFO] [stdout] 0ac4446307545fa3735d3b879724d23f58dee31f0fa4779a06268f6b5bc7affb