[INFO] cloning repository https://github.com/huangqian/rust-in-action
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/huangqian/rust-in-action" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuangqian%2Frust-in-action", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuangqian%2Frust-in-action'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f36881cede964f6008c95f60cb1004db4fba9cc2
[INFO] testing huangqian/rust-in-action against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuangqian%2Frust-in-action" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/huangqian/rust-in-action on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/huangqian/rust-in-action
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/huangqian/rust-in-action
[INFO] tweaked toml for git repo https://github.com/huangqian/rust-in-action written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/huangqian/rust-in-action already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2dfba071602b3cb6191b260588c588b4667566ef05a96bd83a1be6550a21c029
[INFO] running `Command { std: "docker" "start" "-a" "2dfba071602b3cb6191b260588c588b4667566ef05a96bd83a1be6550a21c029", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2dfba071602b3cb6191b260588c588b4667566ef05a96bd83a1be6550a21c029", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2dfba071602b3cb6191b260588c588b4667566ef05a96bd83a1be6550a21c029", kill_on_drop: false }`
[INFO] [stdout] 2dfba071602b3cb6191b260588c588b4667566ef05a96bd83a1be6550a21c029
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b900251e299a150c9dda46170553aaebc8a51e41f2a52d3de13061cf81999b34
[INFO] running `Command { std: "docker" "start" "-a" "b900251e299a150c9dda46170553aaebc8a51e41f2a52d3de13061cf81999b34", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling byteorder v1.2.6
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]    Compiling ucd-util v0.1.2
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling rand_core v0.2.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling termcolor v1.0.5
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling futures v0.1.25
[INFO] [stderr]    Compiling bindgen v0.49.4
[INFO] [stderr]    Compiling shlex v0.1.1
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling slab v0.4.1
[INFO] [stderr]    Compiling num-bigint v0.2.1
[INFO] [stderr]    Compiling lazycell v1.2.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.7
[INFO] [stderr]    Compiling sha1 v0.6.0
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]    Compiling nix v0.12.0
[INFO] [stderr]    Compiling crossbeam-utils v0.5.0
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling opaque-debug v0.2.2
[INFO] [stderr]    Compiling bit-vec v0.5.0
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling uuid v0.7.2
[INFO] [stderr]    Compiling mysql v15.1.0
[INFO] [stderr]    Compiling ascii v0.7.1
[INFO] [stderr]    Compiling redis v0.10.0
[INFO] [stderr]    Compiling bufstream v0.1.4
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling log v0.4.5
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.3
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling regex-syntax v0.6.3
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling block-padding v0.1.3
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling smallvec v0.6.5
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling lock_api v0.1.4
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling clang-sys v0.28.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling tokio-executor v0.1.5
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling atoi v0.3.1
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling combine v3.5.2
[INFO] [stderr]    Compiling bytes v0.4.10
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.0
[INFO] [stderr]    Compiling flate2 v1.0.4
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling tokio-io v0.1.10
[INFO] [stderr]    Compiling cexpr v0.3.6
[INFO] [stderr]    Compiling backtrace v0.3.12
[INFO] [stderr]    Compiling twox-hash v1.1.1
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.6
[INFO] [stderr]    Compiling tokio-tcp v0.1.2
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling serde_json v1.0.32
[INFO] [stderr]    Compiling mysql_common v0.15.0
[INFO] [stderr]    Compiling croaring-sys v0.4.1
[INFO] [stderr]    Compiling croaring v0.4.1
[INFO] [stderr]    Compiling rust-in-action v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `user1`
[INFO] [stdout]   --> src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let user1 = User{
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]   --> src/main.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | struct User{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `struct_example`
[INFO] [stdout]   --> src/main.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn struct_example(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 55.09s
[INFO] running `Command { std: "docker" "inspect" "b900251e299a150c9dda46170553aaebc8a51e41f2a52d3de13061cf81999b34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b900251e299a150c9dda46170553aaebc8a51e41f2a52d3de13061cf81999b34", kill_on_drop: false }`
[INFO] [stdout] b900251e299a150c9dda46170553aaebc8a51e41f2a52d3de13061cf81999b34
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4b3e63a43f537de2aaf01bd957ef861a56a0aea0b4da61c16c1af1382c6515a3
[INFO] running `Command { std: "docker" "start" "-a" "4b3e63a43f537de2aaf01bd957ef861a56a0aea0b4da61c16c1af1382c6515a3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-in-action v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> examples/mysql.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `OptsBuilder`, `Opts`, `Pool`, `Value`, `from_value`
[INFO] [stdout]  --> examples/mysql.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 | use mysql::{from_value, Opts, OptsBuilder, Pool, Value};
[INFO] [stdout]   |             ^^^^^^^^^^  ^^^^  ^^^^^^^^^^^  ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `mysql`
[INFO] [stdout]   --> examples/mysql.rs:88:2
[INFO] [stdout]    |
[INFO] [stdout] 88 | }
[INFO] [stdout]    |  ^ consider adding a `main` function to `examples/mysql.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-in-action` due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0601]: `main` function not found in crate `borrow`
[INFO] [stdout]   --> examples/borrow.rs:42:2
[INFO] [stdout]    |
[INFO] [stdout] 42 | }
[INFO] [stdout]    |  ^ consider adding a `main` function to `examples/borrow.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `IpAddrKind`
[INFO] [stdout]  --> examples/enums.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum IpAddrKind{
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-in-action` due to 2 previous errors
[INFO] [stdout] error[E0423]: expected value, found struct `LinkedList`
[INFO] [stdout]   --> examples/collection/list.rs:5:5
[INFO] [stdout]    |
[INFO] [stdout] 5  |       LinkedList
[INFO] [stdout]    |       ^^^^^^^^^^ help: use struct literal syntax instead: `LinkedList { head: val, tail: val, len: val, marker: val }`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0423`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-in-action` due to 2 previous errors
[INFO] [stdout] error[E0601]: `main` function not found in crate `box`
[INFO] [stdout]   --> examples/box.rs:61:2
[INFO] [stdout]    |
[INFO] [stdout] 61 | }
[INFO] [stdout]    |  ^ consider adding a `main` function to `examples/box.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function, tuple struct or tuple variant `Structure` in this scope
[INFO] [stdout]  --> examples/structs.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 |     println!("{:?}", Structure(3));
[INFO] [stdout]   |                      ^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `while_case`
[INFO] [stdout]   --> examples/loop.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn while_case(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `while_demo_2`
[INFO] [stdout]   --> examples/loop.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn while_demo_2(){
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-in-action` due to 2 previous errors
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]  --> examples/compile-time-function-execution.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let arr = [0, init_len()];
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `one`
[INFO] [stdout]   --> examples/match.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let one = increment(None);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_one`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-in-action` due to 2 previous errors
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]   --> examples/match.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     Alabama,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> examples/match.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]   --> examples/match.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dime`
[INFO] [stdout]   --> examples/match.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]  --> examples/ownership.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let s2 = s1;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> examples/function-pointer.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let a  = 2;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> examples/function-pointer.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let b  = 3;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> examples/redis.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene, decl_macro)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `redis::Commands`
[INFO] [stdout]  --> examples/redis.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use redis::Commands;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `redis`
[INFO] [stdout]   --> examples/redis.rs:42:2
[INFO] [stdout]    |
[INFO] [stdout] 42 | }
[INFO] [stdout]    |  ^ consider adding a `main` function to `examples/redis.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-in-action` due to 3 previous errors; 1 warning emitted
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0601.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f2`
[INFO] [stdout]   --> examples/copy.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let f2 = f1;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_f2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user1`
[INFO] [stdout]   --> src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let user1 = User{
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]   --> src/main.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | struct User{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `struct_example`
[INFO] [stdout]   --> src/main.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn struct_example(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4b3e63a43f537de2aaf01bd957ef861a56a0aea0b4da61c16c1af1382c6515a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b3e63a43f537de2aaf01bd957ef861a56a0aea0b4da61c16c1af1382c6515a3", kill_on_drop: false }`
[INFO] [stdout] 4b3e63a43f537de2aaf01bd957ef861a56a0aea0b4da61c16c1af1382c6515a3