[INFO] cloning repository https://github.com/ItzGuuh/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ItzGuuh/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FItzGuuh%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FItzGuuh%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f8ad2e21de6bf96f927f56fb377476a5806ecd03
[INFO] testing ItzGuuh/rust-playground against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FItzGuuh%2Frust-playground" "/workspace/builds/worker-49/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-49/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ItzGuuh/rust-playground on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ItzGuuh/rust-playground
[INFO] finished tweaking git repo https://github.com/ItzGuuh/rust-playground
[INFO] tweaked toml for git repo https://github.com/ItzGuuh/rust-playground written to /workspace/builds/worker-49/source/Cargo.toml
[INFO] crate git repo https://github.com/ItzGuuh/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48bf3130f4a6317c472bc1d01e075aee8ee773576935c76b7848ac4cd74b310d
[INFO] running `Command { std: "docker" "start" "-a" "48bf3130f4a6317c472bc1d01e075aee8ee773576935c76b7848ac4cd74b310d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48bf3130f4a6317c472bc1d01e075aee8ee773576935c76b7848ac4cd74b310d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48bf3130f4a6317c472bc1d01e075aee8ee773576935c76b7848ac4cd74b310d", kill_on_drop: false }`
[INFO] [stdout] 48bf3130f4a6317c472bc1d01e075aee8ee773576935c76b7848ac4cd74b310d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5eb2e3bf9972e9ded637451f3800edeb3cadcfb6de28cc67d724c9af635db3e
[INFO] running `Command { std: "docker" "start" "-a" "d5eb2e3bf9972e9ded637451f3800edeb3cadcfb6de28cc67d724c9af635db3e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.102
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]    Compiling strum v0.21.0
[INFO] [stderr]    Compiling deck_of_cards v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `my_cards`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let my_cards = new_deck.get_cards().get_n_cards_from_top(Some(5));
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_cards`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Hand`
[INFO] [stdout]  --> src/card_holder/card/hand.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Hand {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.80s
[INFO] running `Command { std: "docker" "inspect" "d5eb2e3bf9972e9ded637451f3800edeb3cadcfb6de28cc67d724c9af635db3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5eb2e3bf9972e9ded637451f3800edeb3cadcfb6de28cc67d724c9af635db3e", kill_on_drop: false }`
[INFO] [stdout] d5eb2e3bf9972e9ded637451f3800edeb3cadcfb6de28cc67d724c9af635db3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 238f95909975a4e85287bfee2a528aead2c4be21bafcacf4179cf38a301bf174
[INFO] running `Command { std: "docker" "start" "-a" "238f95909975a4e85287bfee2a528aead2c4be21bafcacf4179cf38a301bf174", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling deck_of_cards v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `my_cards`
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let my_cards = new_deck.get_cards().get_n_cards_from_top(Some(5));
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_cards`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Hand`
[INFO] [stdout]  --> src/card_holder/card/hand.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Hand {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "238f95909975a4e85287bfee2a528aead2c4be21bafcacf4179cf38a301bf174", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "238f95909975a4e85287bfee2a528aead2c4be21bafcacf4179cf38a301bf174", kill_on_drop: false }`
[INFO] [stdout] 238f95909975a4e85287bfee2a528aead2c4be21bafcacf4179cf38a301bf174
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 12dc25bdfb6b4afdf07260294a55f87323ab95ad559f17825be352a3a3d0d672
[INFO] running `Command { std: "docker" "start" "-a" "12dc25bdfb6b4afdf07260294a55f87323ab95ad559f17825be352a3a3d0d672", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused variable: `my_cards`
[INFO] [stderr]   --> src/main.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let my_cards = new_deck.get_cards().get_n_cards_from_top(Some(5));
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_cards`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Hand`
[INFO] [stderr]  --> src/card_holder/card/hand.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Hand {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `deck_of_cards` (bin "deck_of_cards" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.92s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/deck_of_cards-c6fc17f8f1ca75d2)
[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" "12dc25bdfb6b4afdf07260294a55f87323ab95ad559f17825be352a3a3d0d672", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12dc25bdfb6b4afdf07260294a55f87323ab95ad559f17825be352a3a3d0d672", kill_on_drop: false }`
[INFO] [stdout] 12dc25bdfb6b4afdf07260294a55f87323ab95ad559f17825be352a3a3d0d672