[INFO] cloning 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" "clone" "--bare" "https://github.com/chokri/rust-basics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchokri%2Frust-basics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchokri%2Frust-basics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d3e8d46516a9c6b9045c0067939a50b8c43ece9
[INFO] testing chokri/rust-basics against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchokri%2Frust-basics" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chokri/rust-basics on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "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-0/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" "+1.49.0" "fetch" "--locked" "--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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", 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] 132efbe8f97da9be7ce0d215b58c264d6f845f54720f2662f46da5b8edb25d09
[INFO] running `Command { std: "docker" "start" "-a" "132efbe8f97da9be7ce0d215b58c264d6f845f54720f2662f46da5b8edb25d09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "132efbe8f97da9be7ce0d215b58c264d6f845f54720f2662f46da5b8edb25d09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "132efbe8f97da9be7ce0d215b58c264d6f845f54720f2662f46da5b8edb25d09", kill_on_drop: false }`
[INFO] [stdout] 132efbe8f97da9be7ce0d215b58c264d6f845f54720f2662f46da5b8edb25d09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d83bee4e60f701524d3fedf23ef887a22ee6d8e2441d73fd24fd62da4290b496
[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" "d83bee4e60f701524d3fedf23ef887a22ee6d8e2441d73fd24fd62da4290b496", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling generic-array v0.12.3
[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 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 `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 8.51s
[INFO] running `Command { std: "docker" "inspect" "d83bee4e60f701524d3fedf23ef887a22ee6d8e2441d73fd24fd62da4290b496", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d83bee4e60f701524d3fedf23ef887a22ee6d8e2441d73fd24fd62da4290b496", kill_on_drop: false }`
[INFO] [stdout] d83bee4e60f701524d3fedf23ef887a22ee6d8e2441d73fd24fd62da4290b496
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cad7be80a8e2f709212513d503b928e7e0b087e6622163cb18f1a702ad9d902d
[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" "cad7be80a8e2f709212513d503b928e7e0b087e6622163cb18f1a702ad9d902d", 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 `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" "cad7be80a8e2f709212513d503b928e7e0b087e6622163cb18f1a702ad9d902d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cad7be80a8e2f709212513d503b928e7e0b087e6622163cb18f1a702ad9d902d", kill_on_drop: false }`
[INFO] [stdout] cad7be80a8e2f709212513d503b928e7e0b087e6622163cb18f1a702ad9d902d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", 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] b4a7e5d960df81f50d8d2d22572dc0799f5bc2d91690fe9617b1836be31aa99f
[INFO] running `Command { std: "docker" "start" "-a" "b4a7e5d960df81f50d8d2d22572dc0799f5bc2d91690fe9617b1836be31aa99f", 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 `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 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust-7346563cbba08c02
[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" "b4a7e5d960df81f50d8d2d22572dc0799f5bc2d91690fe9617b1836be31aa99f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4a7e5d960df81f50d8d2d22572dc0799f5bc2d91690fe9617b1836be31aa99f", kill_on_drop: false }`
[INFO] [stdout] b4a7e5d960df81f50d8d2d22572dc0799f5bc2d91690fe9617b1836be31aa99f