[INFO] cloning repository https://github.com/rtalwar26/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/rtalwar26/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frtalwar26%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frtalwar26%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3acc2aca496baa888e75140b5535f559d7648baf
[INFO] testing rtalwar26/rust-playground against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frtalwar26%2Frust-playground" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rtalwar26/rust-playground on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rtalwar26/rust-playground
[INFO] finished tweaking git repo https://github.com/rtalwar26/rust-playground
[INFO] tweaked toml for git repo https://github.com/rtalwar26/rust-playground written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/rtalwar26/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 62a5189c23575e824b6c9351a344710d6c7fadf97be98dd0e9ea82b7eb6dbbe0
[INFO] running `Command { std: "docker" "start" "-a" "62a5189c23575e824b6c9351a344710d6c7fadf97be98dd0e9ea82b7eb6dbbe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "62a5189c23575e824b6c9351a344710d6c7fadf97be98dd0e9ea82b7eb6dbbe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62a5189c23575e824b6c9351a344710d6c7fadf97be98dd0e9ea82b7eb6dbbe0", kill_on_drop: false }`
[INFO] [stdout] 62a5189c23575e824b6c9351a344710d6c7fadf97be98dd0e9ea82b7eb6dbbe0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2312a4aadf1d794aab3e4e6866e9d69d2c65e8c20c2e0d1fae6dff5f58f49b60
[INFO] running `Command { std: "docker" "start" "-a" "2312a4aadf1d794aab3e4e6866e9d69d2c65e8c20c2e0d1fae6dff5f58f49b60", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling myrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |    let d = models::dog();
[INFO] [stdout]    |        ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/main.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let t: Rc<String> = s.clone();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]    --> src/main.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let u = s.clone();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.54s
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2312a4aadf1d794aab3e4e6866e9d69d2c65e8c20c2e0d1fae6dff5f58f49b60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2312a4aadf1d794aab3e4e6866e9d69d2c65e8c20c2e0d1fae6dff5f58f49b60", kill_on_drop: false }`
[INFO] [stdout] 2312a4aadf1d794aab3e4e6866e9d69d2c65e8c20c2e0d1fae6dff5f58f49b60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f3d5301203a62863375c006ef8bf757d2417f10b0af16bb9f863fd488285a3c
[INFO] running `Command { std: "docker" "start" "-a" "4f3d5301203a62863375c006ef8bf757d2417f10b0af16bb9f863fd488285a3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling myrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |    let d = models::dog();
[INFO] [stdout]    |        ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/main.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let t: Rc<String> = s.clone();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]    --> src/main.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 |     let u = s.clone();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "4f3d5301203a62863375c006ef8bf757d2417f10b0af16bb9f863fd488285a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f3d5301203a62863375c006ef8bf757d2417f10b0af16bb9f863fd488285a3c", kill_on_drop: false }`
[INFO] [stdout] 4f3d5301203a62863375c006ef8bf757d2417f10b0af16bb9f863fd488285a3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 783eac43feb7ea7cd53857cbc94f5a3bc6c9b0b553189125855eb8639ecdb8d7
[INFO] running `Command { std: "docker" "start" "-a" "783eac43feb7ea7cd53857cbc94f5a3bc6c9b0b553189125855eb8639ecdb8d7", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/main.rs:35:8
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 35 |    let d = models::dog();
[INFO] [stdout] 
[INFO] [stderr]    |        ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/main.rs:106:9
[INFO] [stderr]     |
[INFO] [stderr] 106 |     let t: Rc<String> = s.clone();
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]    --> src/main.rs:107:9
[INFO] [stderr]     |
[INFO] [stderr] 107 |     let u = s.clone();
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: `myrust` (bin "myrust" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/myrust-3a0343e4ce30bdab)
[INFO] running `Command { std: "docker" "inspect" "783eac43feb7ea7cd53857cbc94f5a3bc6c9b0b553189125855eb8639ecdb8d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "783eac43feb7ea7cd53857cbc94f5a3bc6c9b0b553189125855eb8639ecdb8d7", kill_on_drop: false }`
[INFO] [stdout] 783eac43feb7ea7cd53857cbc94f5a3bc6c9b0b553189125855eb8639ecdb8d7