[INFO] updating cached repository https://github.com/chokri/rust-basics
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d3e8d46516a9c6b9045c0067939a50b8c43ece9
[INFO] testing chokri/rust-basics against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchokri%2Frust-basics" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chokri/rust-basics on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-5/source/Cargo.toml
[INFO] crate git repo https://github.com/chokri/rust-basics already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ca1ab8094ab753a324f4fd5a1e1b395cc54884631851c5063fc43ca1d1dc945
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1ca1ab8094ab753a324f4fd5a1e1b395cc54884631851c5063fc43ca1d1dc945", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ca1ab8094ab753a324f4fd5a1e1b395cc54884631851c5063fc43ca1d1dc945", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ca1ab8094ab753a324f4fd5a1e1b395cc54884631851c5063fc43ca1d1dc945", kill_on_drop: false }`
[INFO] [stdout] 1ca1ab8094ab753a324f4fd5a1e1b395cc54884631851c5063fc43ca1d1dc945
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 604e7e04997e509e919d61d66e220796c09ef2834664f86fc6fca6c32c32e967
[INFO] running `Command { std: "docker" "start" "-a" "604e7e04997e509e919d61d66e220796c09ef2834664f86fc6fca6c32c32e967", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling block-cipher-trait v0.6.2
[INFO] [stderr]    Compiling blowfish v0.4.0
[INFO] [stderr]    Compiling bcrypt v0.4.0
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/vars.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let name = "chokri";
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `age`
[INFO] [stdout]   --> src/vars.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let age = 34; // We can't change this
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_age`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `year`
[INFO] [stdout]   --> src/vars.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let year = 2019; // This can be changed
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_year`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sport`
[INFO] [stdout]   --> src/vars.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let (sport, activity) = ("Basketball", "Playing");
[INFO] [stdout]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_sport`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `activity`
[INFO] [stdout]   --> src/vars.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let (sport, activity) = ("Basketball", "Playing");
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_activity`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/person.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let mut person = Person::new("Chuck", "Norris", "male", 38);
[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: associated function is never used: `full_name`
[INFO] [stdout]   --> src/person.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn full_name (&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::str::<impl str>::replace` that must be used
[INFO] [stdout]   --> src/vars.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     title.replace("world", "there");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this returns the replaced string as a new allocation, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.91s
[INFO] running `Command { std: "docker" "inspect" "604e7e04997e509e919d61d66e220796c09ef2834664f86fc6fca6c32c32e967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "604e7e04997e509e919d61d66e220796c09ef2834664f86fc6fca6c32c32e967", kill_on_drop: false }`
[INFO] [stdout] 604e7e04997e509e919d61d66e220796c09ef2834664f86fc6fca6c32c32e967
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 826494cc8d827960770b1d0a188174fee8224eea68cb96b6ae69714f54d7cb75
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "826494cc8d827960770b1d0a188174fee8224eea68cb96b6ae69714f54d7cb75", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/vars.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let name = "chokri";
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `age`
[INFO] [stdout]   --> src/vars.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let age = 34; // We can't change this
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_age`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `year`
[INFO] [stdout]   --> src/vars.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let year = 2019; // This can be changed
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_year`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sport`
[INFO] [stdout]   --> src/vars.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let (sport, activity) = ("Basketball", "Playing");
[INFO] [stdout]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_sport`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `activity`
[INFO] [stdout]   --> src/vars.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let (sport, activity) = ("Basketball", "Playing");
[INFO] [stdout]    |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_activity`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/person.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let mut person = Person::new("Chuck", "Norris", "male", 38);
[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: associated function is never used: `full_name`
[INFO] [stdout]   --> src/person.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn full_name (&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::str::<impl str>::replace` that must be used
[INFO] [stdout]   --> src/vars.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     title.replace("world", "there");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this returns the replaced string as a new allocation, without modifying the original
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "826494cc8d827960770b1d0a188174fee8224eea68cb96b6ae69714f54d7cb75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "826494cc8d827960770b1d0a188174fee8224eea68cb96b6ae69714f54d7cb75", kill_on_drop: false }`
[INFO] [stdout] 826494cc8d827960770b1d0a188174fee8224eea68cb96b6ae69714f54d7cb75
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 60ea394546700c0bb88b431fb64f8d2524221b97c601e0f08ada779dc11a2aea
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "60ea394546700c0bb88b431fb64f8d2524221b97c601e0f08ada779dc11a2aea", kill_on_drop: false }`
[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: associated function is never used: `full_name`
[INFO] [stderr]   --> src/person.rs:19:8
[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: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust-7d4bc1e9bb358f5e
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "60ea394546700c0bb88b431fb64f8d2524221b97c601e0f08ada779dc11a2aea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60ea394546700c0bb88b431fb64f8d2524221b97c601e0f08ada779dc11a2aea", kill_on_drop: false }`
[INFO] [stdout] 60ea394546700c0bb88b431fb64f8d2524221b97c601e0f08ada779dc11a2aea