[INFO] updating cached repository https://github.com/chokri/rust-basics
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6d3e8d46516a9c6b9045c0067939a50b8c43ece9
[INFO] checking chokri/rust-basics against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchokri%2Frust-basics" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chokri/rust-basics on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/chokri/rust-basics
[INFO] finished tweaking git repo https://github.com/chokri/rust-basics
[INFO] tweaked toml for git repo https://github.com/chokri/rust-basics written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/chokri/rust-basics already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 675f61709e59a8980685abeef457a3bf8cd8664d9d26357459fb2751d69c5591
[INFO] running `"docker" "start" "-a" "675f61709e59a8980685abeef457a3bf8cd8664d9d26357459fb2751d69c5591"`
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking block-cipher-trait v0.6.2
[INFO] [stderr]     Checking blowfish v0.4.0
[INFO] [stderr]     Checking bcrypt v0.4.0
[INFO] [stderr]     Checking rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]   --> src/vars.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let name = "chokri";
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `age`
[INFO] [stderr]   --> src/vars.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let age = 34; // We can't change this
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_age`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `year`
[INFO] [stderr]   --> src/vars.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let year = 2019; // This can be changed
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_year`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sport`
[INFO] [stderr]   --> src/vars.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let (sport, activity) = ("Basketball", "Playing");
[INFO] [stderr]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_sport`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `activity`
[INFO] [stderr]   --> src/vars.rs:21:17
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let (sport, activity) = ("Basketball", "Playing");
[INFO] [stderr]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_activity`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]   --> src/vars.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let name = "chokri";
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `age`
[INFO] [stderr]   --> src/vars.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let age = 34; // We can't change this
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_age`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `year`
[INFO] [stderr]   --> src/vars.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let year = 2019; // This can be changed
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_year`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sport`
[INFO] [stderr]   --> src/vars.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let (sport, activity) = ("Basketball", "Playing");
[INFO] [stderr]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_sport`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `activity`
[INFO] [stderr]   --> src/vars.rs:21:17
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let (sport, activity) = ("Basketball", "Playing");
[INFO] [stderr]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_activity`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/person.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut person = Person::new("Chuck", "Norris", "male", 38);
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/person.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut person = Person::new("Chuck", "Norris", "male", 38);
[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: method is never used: `full_name`
[INFO] [stderr]   --> src/person.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn full_name (&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `full_name`
[INFO] [stderr]   --> src/person.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn full_name (&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::str::<impl str>::replace` that must be used
[INFO] [stderr]   --> src/vars.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     title.replace("world", "there");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this returns the replaced string as a new allocation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::str::<impl str>::replace` that must be used
[INFO] [stderr]   --> src/vars.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     title.replace("world", "there");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this returns the replaced string as a new allocation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.76s
[INFO] running `"docker" "inspect" "675f61709e59a8980685abeef457a3bf8cd8664d9d26357459fb2751d69c5591"`
[INFO] running `"docker" "rm" "-f" "675f61709e59a8980685abeef457a3bf8cd8664d9d26357459fb2751d69c5591"`
[INFO] [stdout] 675f61709e59a8980685abeef457a3bf8cd8664d9d26357459fb2751d69c5591