[INFO] cloning repository https://github.com/PiZep/rust_exercices
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PiZep/rust_exercices" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPiZep%2Frust_exercices", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPiZep%2Frust_exercices'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7772806e056ac28847be7fa689aba29e5ab2bee4
[INFO] testing PiZep/rust_exercices against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPiZep%2Frust_exercices" "/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/PiZep/rust_exercices on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PiZep/rust_exercices
[INFO] finished tweaking git repo https://github.com/PiZep/rust_exercices
[INFO] tweaked toml for git repo https://github.com/PiZep/rust_exercices written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/PiZep/rust_exercices already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 88ee5ea91e5a20dfd02754c2cdf9ebb29efe5832712273b91b190d19d0511188
[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" "88ee5ea91e5a20dfd02754c2cdf9ebb29efe5832712273b91b190d19d0511188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "88ee5ea91e5a20dfd02754c2cdf9ebb29efe5832712273b91b190d19d0511188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88ee5ea91e5a20dfd02754c2cdf9ebb29efe5832712273b91b190d19d0511188", kill_on_drop: false }`
[INFO] [stdout] 88ee5ea91e5a20dfd02754c2cdf9ebb29efe5832712273b91b190d19d0511188
[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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] daaa74ad9591558f6d1cab6532c8556faed517753c74f420335b6281472dcf89
[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" "daaa74ad9591558f6d1cab6532c8556faed517753c74f420335b6281472dcf89", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]    Compiling collections_ex v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `num` is never read
[INFO] [stdout]   --> src/integer_list.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut num: u8 = 0;
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `range` is never read
[INFO] [stdout]   --> src/integer_list.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut range: i64 = 0;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.73s
[INFO] running `Command { std: "docker" "inspect" "daaa74ad9591558f6d1cab6532c8556faed517753c74f420335b6281472dcf89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "daaa74ad9591558f6d1cab6532c8556faed517753c74f420335b6281472dcf89", kill_on_drop: false }`
[INFO] [stdout] daaa74ad9591558f6d1cab6532c8556faed517753c74f420335b6281472dcf89
[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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--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] 8432c8d7e20f4d31d4db37d8780201571c53d789795d84097f99bf7b88ffdd96
[INFO] running `Command { std: "docker" "start" "-a" "8432c8d7e20f4d31d4db37d8780201571c53d789795d84097f99bf7b88ffdd96", kill_on_drop: false }`
[INFO] [stderr]    Compiling collections_ex v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `num` is never read
[INFO] [stdout]   --> src/integer_list.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut num: u8 = 0;
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `range` is never read
[INFO] [stdout]   --> src/integer_list.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut range: i64 = 0;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `Command { std: "docker" "inspect" "8432c8d7e20f4d31d4db37d8780201571c53d789795d84097f99bf7b88ffdd96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8432c8d7e20f4d31d4db37d8780201571c53d789795d84097f99bf7b88ffdd96", kill_on_drop: false }`
[INFO] [stdout] 8432c8d7e20f4d31d4db37d8780201571c53d789795d84097f99bf7b88ffdd96
[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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7fb163bf176f08f3627da0061a6b8b634b5c0cbc403b953c72c5ca2cf85aa4af
[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" "7fb163bf176f08f3627da0061a6b8b634b5c0cbc403b953c72c5ca2cf85aa4af", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `num` is never read
[INFO] [stderr]   --> src/integer_list.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let mut num: u8 = 0;
[INFO] [stderr]    |         ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `range` is never read
[INFO] [stderr]   --> src/integer_list.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut range: i64 = 0;
[INFO] [stderr]    |         ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/collections_ex-18d860e8b927f2ad
[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" "7fb163bf176f08f3627da0061a6b8b634b5c0cbc403b953c72c5ca2cf85aa4af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7fb163bf176f08f3627da0061a6b8b634b5c0cbc403b953c72c5ca2cf85aa4af", kill_on_drop: false }`
[INFO] [stdout] 7fb163bf176f08f3627da0061a6b8b634b5c0cbc403b953c72c5ca2cf85aa4af
