[INFO] cloning repository https://github.com/suhanyujie/hello_cargo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/suhanyujie/hello_cargo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhanyujie%2Fhello_cargo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhanyujie%2Fhello_cargo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e2ca02230864e628c8cd21c7090da828459fec11
[INFO] testing suhanyujie/hello_cargo against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsuhanyujie%2Fhello_cargo" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/suhanyujie/hello_cargo on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/suhanyujie/hello_cargo
[INFO] finished tweaking git repo https://github.com/suhanyujie/hello_cargo
[INFO] tweaked toml for git repo https://github.com/suhanyujie/hello_cargo written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/suhanyujie/hello_cargo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v0.4.25
[INFO] [stderr]   Downloaded rand v0.4.5
[INFO] [stderr]   Downloaded csv v1.0.5
[INFO] [stderr]   Downloaded structopt-derive v0.2.14
[INFO] [stderr]   Downloaded structopt v0.2.14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63ca20217ab157f5c24026a54632bcf61c565743cfb2f70ce489e3217ad20337
[INFO] running `Command { std: "docker" "start" "-a" "63ca20217ab157f5c24026a54632bcf61c565743cfb2f70ce489e3217ad20337", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63ca20217ab157f5c24026a54632bcf61c565743cfb2f70ce489e3217ad20337", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63ca20217ab157f5c24026a54632bcf61c565743cfb2f70ce489e3217ad20337", kill_on_drop: false }`
[INFO] [stdout] 63ca20217ab157f5c24026a54632bcf61c565743cfb2f70ce489e3217ad20337
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c664843f8c1cecf2ddaeaebfa7bd1643e33e981a207aa8fab78e31b5a96f5d2
[INFO] running `Command { std: "docker" "start" "-a" "7c664843f8c1cecf2ddaeaebfa7bd1643e33e981a207aa8fab78e31b5a96f5d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling proc-macro2 v0.4.25
[INFO] [stderr]    Compiling serde v1.0.84
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling encode_unicode v0.3.5
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]    Compiling term v0.5.1
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling rand v0.4.5
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling csv-core v0.1.5
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling csv v1.0.5
[INFO] [stderr]    Compiling bincode v1.0.1
[INFO] [stderr]    Compiling structopt-derive v0.2.14
[INFO] [stderr]    Compiling serde_derive v1.0.84
[INFO] [stderr]    Compiling prettytable-rs v0.8.0
[INFO] [stderr]    Compiling structopt v0.2.14
[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `hello_cargo::test_code::t1`
[INFO] [stdout]   --> src/bin/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use hello_cargo::test_code::t1;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word1`
[INFO] [stdout]   --> src/bin/main.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let word1 = &my_str1[..];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_word1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/bin/main.rs:59:15
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn slice_show(s: &str) {
[INFO] [stdout]    |               ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]   --> src/bin/main.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Message`
[INFO] [stdout]   --> src/bin/main.rs:22:6
[INFO] [stdout]    |
[INFO] [stdout] 22 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]   --> src/bin/main.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn first_word(s: &String) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `about_slice`
[INFO] [stdout]   --> src/bin/main.rs:89:4
[INFO] [stdout]    |
[INFO] [stdout] 89 | fn about_slice() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ownership_change`
[INFO] [stdout]    --> src/bin/main.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn ownership_change() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mutable_ref_example`
[INFO] [stdout]    --> src/bin/main.rs:106:4
[INFO] [stdout]     |
[INFO] [stdout] 106 | fn mutable_ref_example(s: &mut String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reference_example`
[INFO] [stdout]    --> src/bin/main.rs:112:4
[INFO] [stdout]     |
[INFO] [stdout] 112 | fn reference_example(s: &String) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multipleReturnVal`
[INFO] [stdout]    --> src/bin/main.rs:117:4
[INFO] [stdout]     |
[INFO] [stdout] 117 | fn multipleReturnVal(s: String) -> (String, usize) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `copyDeeply`
[INFO] [stdout]    --> src/bin/main.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn copyDeeply() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `five`
[INFO] [stdout]    --> src/bin/main.rs:131:4
[INFO] [stdout]     |
[INFO] [stdout] 131 | fn five() -> i32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         handle(Command::from_args());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multipleReturnVal` should have a snake case name
[INFO] [stdout]    --> src/bin/main.rs:117:4
[INFO] [stdout]     |
[INFO] [stdout] 117 | fn multipleReturnVal(s: String) -> (String, usize) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `multiple_return_val`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `copyDeeply` should have a snake case name
[INFO] [stdout]    --> src/bin/main.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn copyDeeply() {
[INFO] [stdout]     |    ^^^^^^^^^^ help: convert the identifier to snake case: `copy_deeply`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.32s
[INFO] running `Command { std: "docker" "inspect" "7c664843f8c1cecf2ddaeaebfa7bd1643e33e981a207aa8fab78e31b5a96f5d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c664843f8c1cecf2ddaeaebfa7bd1643e33e981a207aa8fab78e31b5a96f5d2", kill_on_drop: false }`
[INFO] [stdout] 7c664843f8c1cecf2ddaeaebfa7bd1643e33e981a207aa8fab78e31b5a96f5d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b2d8de80884d8532fa2424c5a86bf989b455010c81af0d51678e85b4d33d7f4
[INFO] running `Command { std: "docker" "start" "-a" "0b2d8de80884d8532fa2424c5a86bf989b455010c81af0d51678e85b4d33d7f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello_cargo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `hello_cargo::test_code::t1`
[INFO] [stdout]   --> src/bin/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use hello_cargo::test_code::t1;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word1`
[INFO] [stdout]   --> src/bin/main.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let word1 = &my_str1[..];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_word1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/bin/main.rs:59:15
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn slice_show(s: &str) {
[INFO] [stdout]    |               ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]   --> src/bin/main.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Message`
[INFO] [stdout]   --> src/bin/main.rs:22:6
[INFO] [stdout]    |
[INFO] [stdout] 22 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]   --> src/bin/main.rs:78:4
[INFO] [stdout]    |
[INFO] [stdout] 78 | fn first_word(s: &String) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `about_slice`
[INFO] [stdout]   --> src/bin/main.rs:89:4
[INFO] [stdout]    |
[INFO] [stdout] 89 | fn about_slice() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ownership_change`
[INFO] [stdout]    --> src/bin/main.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn ownership_change() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mutable_ref_example`
[INFO] [stdout]    --> src/bin/main.rs:106:4
[INFO] [stdout]     |
[INFO] [stdout] 106 | fn mutable_ref_example(s: &mut String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `reference_example`
[INFO] [stdout]    --> src/bin/main.rs:112:4
[INFO] [stdout]     |
[INFO] [stdout] 112 | fn reference_example(s: &String) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multipleReturnVal`
[INFO] [stdout]    --> src/bin/main.rs:117:4
[INFO] [stdout]     |
[INFO] [stdout] 117 | fn multipleReturnVal(s: String) -> (String, usize) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `copyDeeply`
[INFO] [stdout]    --> src/bin/main.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn copyDeeply() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `five`
[INFO] [stdout]    --> src/bin/main.rs:131:4
[INFO] [stdout]     |
[INFO] [stdout] 131 | fn five() -> i32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/main.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         handle(Command::from_args());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multipleReturnVal` should have a snake case name
[INFO] [stdout]    --> src/bin/main.rs:117:4
[INFO] [stdout]     |
[INFO] [stdout] 117 | fn multipleReturnVal(s: String) -> (String, usize) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `multiple_return_val`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `copyDeeply` should have a snake case name
[INFO] [stdout]    --> src/bin/main.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn copyDeeply() {
[INFO] [stdout]     |    ^^^^^^^^^^ help: convert the identifier to snake case: `copy_deeply`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.12s
[INFO] running `Command { std: "docker" "inspect" "0b2d8de80884d8532fa2424c5a86bf989b455010c81af0d51678e85b4d33d7f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b2d8de80884d8532fa2424c5a86bf989b455010c81af0d51678e85b4d33d7f4", kill_on_drop: false }`
[INFO] [stdout] 0b2d8de80884d8532fa2424c5a86bf989b455010c81af0d51678e85b4d33d7f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d7883a96b290c2119c57e211c937e61e4b7820064a1de5c4502b759cadf4d259
[INFO] running `Command { std: "docker" "start" "-a" "d7883a96b290c2119c57e211c937e61e4b7820064a1de5c4502b759cadf4d259", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `hello_cargo::test_code::t1`
[INFO] [stderr]   --> src/bin/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use hello_cargo::test_code::t1;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word1`
[INFO] [stderr]   --> src/bin/main.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let word1 = &my_str1[..];
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_word1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/bin/main.rs:59:15
[INFO] [stderr]    |
[INFO] [stderr] 59 | fn slice_show(s: &str) {
[INFO] [stderr]    |               ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `User`
[INFO] [stderr]   --> src/bin/main.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | struct User {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Message`
[INFO] [stderr]   --> src/bin/main.rs:22:6
[INFO] [stderr]    |
[INFO] [stderr] 22 | enum Message {
[INFO] [stderr]    |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `first_word`
[INFO] [stderr]   --> src/bin/main.rs:78:4
[INFO] [stderr]    |
[INFO] [stderr] 78 | fn first_word(s: &String) -> &str {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `about_slice`
[INFO] [stderr]   --> src/bin/main.rs:89:4
[INFO] [stderr]    |
[INFO] [stderr] 89 | fn about_slice() {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `ownership_change`
[INFO] [stderr]    --> src/bin/main.rs:100:4
[INFO] [stderr]     |
[INFO] [stderr] 100 | fn ownership_change() -> String {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `mutable_ref_example`
[INFO] [stderr]    --> src/bin/main.rs:106:4
[INFO] [stderr]     |
[INFO] [stderr] 106 | fn mutable_ref_example(s: &mut String) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reference_example`
[INFO] [stderr]    --> src/bin/main.rs:112:4
[INFO] [stderr]     |
[INFO] [stderr] 112 | fn reference_example(s: &String) -> usize {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `multipleReturnVal`
[INFO] [stderr]    --> src/bin/main.rs:117:4
[INFO] [stderr]     |
[INFO] [stderr] 117 | fn multipleReturnVal(s: String) -> (String, usize) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `copyDeeply`
[INFO] [stderr]    --> src/bin/main.rs:123:4
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn copyDeeply() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `five`
[INFO] [stderr]    --> src/bin/main.rs:131:4
[INFO] [stderr]     |
[INFO] [stderr] 131 | fn five() -> i32 {
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/bin/main.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |         handle(Command::from_args());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: function `multipleReturnVal` should have a snake case name
[INFO] [stderr]    --> src/bin/main.rs:117:4
[INFO] [stderr]     |
[INFO] [stderr] 117 | fn multipleReturnVal(s: String) -> (String, usize) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `multiple_return_val`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `copyDeeply` should have a snake case name
[INFO] [stderr]    --> src/bin/main.rs:123:4
[INFO] [stderr]     |
[INFO] [stderr] 123 | fn copyDeeply() {
[INFO] [stderr]     |    ^^^^^^^^^^ help: convert the identifier to snake case: `copy_deeply`
[INFO] [stderr] 
[INFO] [stderr] warning: `hello_cargo` (bin "main" test) generated 16 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/hello_cargo-dcb973559a7d8c7f)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test test_code::t1::tests::be_bytes ... ok
[INFO] [stdout] test rs_string::highlight::tests::test_highlight_string ... ok
[INFO] [stdout] test rs_string::string::tests::test_permute_case ... ok
[INFO] [stdout] test rs_string::string::tests::test_rm_string_duplicates ... ok
[INFO] [stdout] test test_code::t1::tests::to_bytes ... ok
[INFO] [stdout] test rs_string::string::tests::test_contains ... ok
[INFO] [stdout] test rs_string::string::tests::test_is_space ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 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-1699ada66c1ab3d7)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests hello_cargo
[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] [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" "d7883a96b290c2119c57e211c937e61e4b7820064a1de5c4502b759cadf4d259", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7883a96b290c2119c57e211c937e61e4b7820064a1de5c4502b759cadf4d259", kill_on_drop: false }`
[INFO] [stdout] d7883a96b290c2119c57e211c937e61e4b7820064a1de5c4502b759cadf4d259