[INFO] cloning repository https://github.com/Nov11/rust-pl
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nov11/rust-pl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNov11%2Frust-pl", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNov11%2Frust-pl'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0a7cf494b601889c42daf4e23e78245e01117607
[INFO] testing Nov11/rust-pl against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNov11%2Frust-pl" "/workspace/builds/worker-47/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-47/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nov11/rust-pl on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Nov11/rust-pl
[INFO] finished tweaking git repo https://github.com/Nov11/rust-pl
[INFO] tweaked toml for git repo https://github.com/Nov11/rust-pl written to /workspace/builds/worker-47/source/Cargo.toml
[INFO] crate git repo https://github.com/Nov11/rust-pl already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 91ab83df9e75e447c80d9ec31aca0a65661db8d38d3097983c54353dac539083
[INFO] running `Command { std: "docker" "start" "-a" "91ab83df9e75e447c80d9ec31aca0a65661db8d38d3097983c54353dac539083", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91ab83df9e75e447c80d9ec31aca0a65661db8d38d3097983c54353dac539083", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91ab83df9e75e447c80d9ec31aca0a65661db8d38d3097983c54353dac539083", kill_on_drop: false }`
[INFO] [stdout] 91ab83df9e75e447c80d9ec31aca0a65661db8d38d3097983c54353dac539083
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 933ef3d293428db4f8913e0f8493870bdc99753604b3dca8ef013553a6b05bb1
[INFO] running `Command { std: "docker" "start" "-a" "933ef3d293428db4f8913e0f8493870bdc99753604b3dca8ef013553a6b05bb1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling traitobject v0.1.0
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling smallvec v0.6.10
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling modifier v0.1.0
[INFO] [stderr]    Compiling rayon-core v1.6.0
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling dtoa v0.2.2
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling itoa v0.1.1
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling bitflags v0.7.0
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling inflate v0.2.0
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling route-recognizer v0.1.13
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/rustwide/workdir/minigrep)
[INFO] [stderr]    Compiling state-pattern v0.1.0 (/opt/rustwide/workdir/state-pattern)
[INFO] [stderr]    Compiling ch20 v0.1.0 (/opt/rustwide/workdir/ch20)
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling add_two v0.1.0 (/opt/rustwide/workdir/add_two)
[INFO] [stderr]    Compiling cmd v0.1.0 (/opt/rustwide/workdir/cmd)
[INFO] [stderr]    Compiling ref-scope v0.1.0 (/opt/rustwide/workdir/ref-scope)
[INFO] [stderr]    Compiling closures v0.1.0 (/opt/rustwide/workdir/closures)
[INFO] [stderr]    Compiling modules v0.1.0 (/opt/rustwide/workdir/modules)
[INFO] [stderr]    Compiling box-usage v0.1.0 (/opt/rustwide/workdir/box-usage)
[INFO] [stderr]    Compiling ch19 v0.1.0 (/opt/rustwide/workdir/ch19)
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling unsafe-any v0.4.2
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]  --> box-usage/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let list = List::Cons(1, Box::new(List::Nil));
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]   --> ch19/src/main.rs:18:18
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add(self, rhs: Self) -> Self::Output {
[INFO] [stdout]    |                  ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_fn`
[INFO] [stdout]   --> ch19/src/main.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn return_fn() -> Box<dyn Fn(i32) -> i32>{
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> state-pattern/src/lib.rs:38:27
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling error v0.1.9
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.8
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stdout] warning: unused variable: `v2`
[INFO] [stdout]  --> closures/src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let v2 = vec;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `plus_magic`
[INFO] [stdout]   --> closures/src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let plus_magic = |x: i32| x + magic_num;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_plus_magic`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `more_magic`
[INFO] [stdout]   --> closures/src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let more_magic = &mut magic_num; // Err!
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_more_magic`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> closures/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut vec = vec![1, 2, 3];
[INFO] [stdout]   |         ----^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `number`
[INFO] [stdout]   --> closures/src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     number: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `default_ref`
[INFO] [stdout]   --> closures/src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn default_ref() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `default_move`
[INFO] [stdout]   --> closures/src/main.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn default_move() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement drops value
[INFO] [stdout]   --> closures/src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         numbers;
[INFO] [stdout]    |         ^^^^^^^^ help: use `drop` to clarify the intent: `drop(numbers);`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling gif v0.9.2
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling plugin v0.2.6
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling conduit-mime-types v0.7.3
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling rust-programming-language v0.1.0 (/opt/rustwide/workdir/ch01)
[INFO] [stderr]    Compiling serde_json v0.8.6
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling add_one v0.1.0 (/opt/rustwide/workdir/add_one)
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling guess-game v0.1.0 (/opt/rustwide/workdir/guess-game)
[INFO] [stderr]    Compiling adder v0.1.0 (/opt/rustwide/workdir/adder)
[INFO] [stderr]    Compiling png v0.7.0
[INFO] [stderr]    Compiling rayon v1.2.0
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling jpeg-decoder v0.1.16
[INFO] [stderr]    Compiling image v0.13.0
[INFO] [stderr]    Compiling iron v0.5.1
[INFO] [stderr]    Compiling persistent v0.3.0
[INFO] [stderr]    Compiling router v0.5.1
[INFO] [stderr]    Compiling bodyparser v0.5.0
[INFO] [stderr]    Compiling urlencoded v0.5.0
[INFO] [stderr]    Compiling simple-web-server v0.1.0 (/opt/rustwide/workdir/simple-web-server)
[INFO] [stderr]    Compiling concurrency v0.1.0 (/opt/rustwide/workdir/concurrency)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.57s
[INFO] running `Command { std: "docker" "inspect" "933ef3d293428db4f8913e0f8493870bdc99753604b3dca8ef013553a6b05bb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "933ef3d293428db4f8913e0f8493870bdc99753604b3dca8ef013553a6b05bb1", kill_on_drop: false }`
[INFO] [stdout] 933ef3d293428db4f8913e0f8493870bdc99753604b3dca8ef013553a6b05bb1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7db0433e7029e0c40af8fd0bac63a4ad4f104611f8fbae83eda82954d33375fd
[INFO] running `Command { std: "docker" "start" "-a" "7db0433e7029e0c40af8fd0bac63a4ad4f104611f8fbae83eda82954d33375fd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling closures v0.1.0 (/opt/rustwide/workdir/closures)
[INFO] [stderr]    Compiling ch19 v0.1.0 (/opt/rustwide/workdir/ch19)
[INFO] [stderr]    Compiling modules v0.1.0 (/opt/rustwide/workdir/modules)
[INFO] [stderr]    Compiling cmd v0.1.0 (/opt/rustwide/workdir/cmd)
[INFO] [stderr]    Compiling box-usage v0.1.0 (/opt/rustwide/workdir/box-usage)
[INFO] [stderr]    Compiling ref-scope v0.1.0 (/opt/rustwide/workdir/ref-scope)
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> state-pattern/src/lib.rs:38:27
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling minigrep v0.1.0 (/opt/rustwide/workdir/minigrep)
[INFO] [stderr]    Compiling add_two v0.1.0 (/opt/rustwide/workdir/add_two)
[INFO] [stderr]    Compiling ch20 v0.1.0 (/opt/rustwide/workdir/ch20)
[INFO] [stderr]    Compiling state-pattern v0.1.0 (/opt/rustwide/workdir/state-pattern)
[INFO] [stderr]    Compiling add_one v0.1.0 (/opt/rustwide/workdir/add_one)
[INFO] [stderr]    Compiling guess-game v0.1.0 (/opt/rustwide/workdir/guess-game)
[INFO] [stderr]    Compiling adder v0.1.0 (/opt/rustwide/workdir/adder)
[INFO] [stderr]    Compiling rust-programming-language v0.1.0 (/opt/rustwide/workdir/ch01)
[INFO] [stderr]    Compiling simple-web-server v0.1.0 (/opt/rustwide/workdir/simple-web-server)
[INFO] [stderr]    Compiling concurrency v0.1.0 (/opt/rustwide/workdir/concurrency)
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]   --> ch19/src/main.rs:18:18
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn add(self, rhs: Self) -> Self::Output {
[INFO] [stdout]    |                  ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_fn`
[INFO] [stdout]   --> ch19/src/main.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn return_fn() -> Box<dyn Fn(i32) -> i32>{
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]  --> box-usage/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let list = List::Cons(1, Box::new(List::Nil));
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v2`
[INFO] [stdout]  --> closures/src/main.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let v2 = vec;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `plus_magic`
[INFO] [stdout]   --> closures/src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let plus_magic = |x: i32| x + magic_num;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_plus_magic`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `more_magic`
[INFO] [stdout]   --> closures/src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let more_magic = &mut magic_num; // Err!
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_more_magic`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> closures/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut vec = vec![1, 2, 3];
[INFO] [stdout]   |         ----^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `number`
[INFO] [stdout]   --> closures/src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     number: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `default_ref`
[INFO] [stdout]   --> closures/src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn default_ref() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `default_move`
[INFO] [stdout]   --> closures/src/main.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn default_move() {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement drops value
[INFO] [stdout]   --> closures/src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         numbers;
[INFO] [stdout]    |         ^^^^^^^^ help: use `drop` to clarify the intent: `drop(numbers);`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> state-pattern/src/lib.rs:38:27
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 10.47s
[INFO] running `Command { std: "docker" "inspect" "7db0433e7029e0c40af8fd0bac63a4ad4f104611f8fbae83eda82954d33375fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7db0433e7029e0c40af8fd0bac63a4ad4f104611f8fbae83eda82954d33375fd", kill_on_drop: false }`
[INFO] [stdout] 7db0433e7029e0c40af8fd0bac63a4ad4f104611f8fbae83eda82954d33375fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 377a701950fab74748fd3a0268619c89a402382eff0491c015d5127e6b39fb50
[INFO] running `Command { std: "docker" "start" "-a" "377a701950fab74748fd3a0268619c89a402382eff0491c015d5127e6b39fb50", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `post`
[INFO] [stderr]   --> state-pattern/src/lib.rs:38:27
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stderr]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs`
[INFO] [stderr]   --> ch19/src/main.rs:18:18
[INFO] [stderr]    |
[INFO] [stderr] 18 |     fn add(self, rhs: Self) -> Self::Output {
[INFO] [stderr]    |                  ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `return_fn`
[INFO] [stderr]   --> ch19/src/main.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn return_fn() -> Box<dyn Fn(i32) -> i32>{
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `list`
[INFO] [stderr]  --> box-usage/src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let list = List::Cons(1, Box::new(List::Nil));
[INFO] [stderr]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v2`
[INFO] [stderr]  --> closures/src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let v2 = vec;
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `plus_magic`
[INFO] [stderr]   --> closures/src/main.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let plus_magic = |x: i32| x + magic_num;
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_plus_magic`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `more_magic`
[INFO] [stderr]   --> closures/src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let more_magic = &mut magic_num; // Err!
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_more_magic`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> closures/src/main.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let mut vec = vec![1, 2, 3];
[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: field is never read: `number`
[INFO] [stderr]   --> closures/src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     number: i32,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `default_ref`
[INFO] [stderr]   --> closures/src/main.rs:16:4
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn default_ref() {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `default_move`
[INFO] [stderr]   --> closures/src/main.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn default_move() {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: path statement drops value
[INFO] [stderr]   --> closures/src/main.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         numbers;
[INFO] [stderr]    |         ^^^^^^^^ help: use `drop` to clarify the intent: `drop(numbers);`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(path_statements)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `state-pattern` (lib) generated 1 warning
[INFO] [stderr] warning: `ch19` (bin "ch19" test) generated 2 warnings
[INFO] [stderr] warning: `box-usage` (bin "box-usage" test) generated 1 warning
[INFO] [stderr] warning: `closures` (bin "closures" test) generated 8 warnings
[INFO] [stderr] warning: `state-pattern` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/add_one-80e52006d54be2aa)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/add_two-4f946464381b8af3)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/adder-a265a1f6d44f3b94)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/box_usage-ba5eeb9529244d57)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/ch19-8082142e0eb8dcd6)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/ch20-7e087099d26e2d73)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/main-50039d79d4ead9d1)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/closures-20b8e0f1d0a2e582)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cmd-517f7f6442820ceb)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/concurrency-3be20d748493a640)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/guess_game-99888dbf636781e8)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/minigrep-4fc9597357905f8d)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::case_insensitive ... ok
[INFO] [stdout] test tests::one_result ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/minigrep-d52a78e45020c718)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/modules-2147d8f8873defe3)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/ref_scope-7967e2299a99a8bc)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_programming_language-272a9c6f593e45bd)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/simple_web_server-1b0e6f145835917a)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/state_pattern-75335e9ffd120116)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/state_pattern-cc3f297692fcff86)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests add_one
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests add_two
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ch20
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests minigrep
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests state-pattern
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "377a701950fab74748fd3a0268619c89a402382eff0491c015d5127e6b39fb50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "377a701950fab74748fd3a0268619c89a402382eff0491c015d5127e6b39fb50", kill_on_drop: false }`
[INFO] [stdout] 377a701950fab74748fd3a0268619c89a402382eff0491c015d5127e6b39fb50