[INFO] cloning repository https://github.com/halu5071/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/halu5071/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhalu5071%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhalu5071%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f83315ba2481785ab7697c97bb98ed97abf0a6e6
[INFO] testing halu5071/rust-playground against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhalu5071%2Frust-playground" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/halu5071/rust-playground on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/halu5071/rust-playground
[INFO] finished tweaking git repo https://github.com/halu5071/rust-playground
[INFO] tweaked toml for git repo https://github.com/halu5071/rust-playground written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/halu5071/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cffce14d02e7d9fc16d8c314ca37790068b261041f0fbc48cb931db5cd093b6b
[INFO] running `Command { std: "docker" "start" "-a" "cffce14d02e7d9fc16d8c314ca37790068b261041f0fbc48cb931db5cd093b6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cffce14d02e7d9fc16d8c314ca37790068b261041f0fbc48cb931db5cd093b6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cffce14d02e7d9fc16d8c314ca37790068b261041f0fbc48cb931db5cd093b6b", kill_on_drop: false }`
[INFO] [stdout] cffce14d02e7d9fc16d8c314ca37790068b261041f0fbc48cb931db5cd093b6b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1efb8fc779da5330a5e37fb978548daeafbfb8c1e85106c4c4bd9be7e7de8c77
[INFO] running `Command { std: "docker" "start" "-a" "1efb8fc779da5330a5e37fb978548daeafbfb8c1e85106c4c4bd9be7e7de8c77", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `guess`
[INFO] [stdout]  --> src/guess.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn guess() {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.97s
[INFO] running `Command { std: "docker" "inspect" "1efb8fc779da5330a5e37fb978548daeafbfb8c1e85106c4c4bd9be7e7de8c77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1efb8fc779da5330a5e37fb978548daeafbfb8c1e85106c4c4bd9be7e7de8c77", kill_on_drop: false }`
[INFO] [stdout] 1efb8fc779da5330a5e37fb978548daeafbfb8c1e85106c4c4bd9be7e7de8c77
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16a34261e79ce7f56e870eab3f92a4646820f32a3a1e3db155d0b68d341057d0
[INFO] running `Command { std: "docker" "start" "-a" "16a34261e79ce7f56e870eab3f92a4646820f32a3a1e3db155d0b68d341057d0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `guess`
[INFO] [stdout]  --> src/guess.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn guess() {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "16a34261e79ce7f56e870eab3f92a4646820f32a3a1e3db155d0b68d341057d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16a34261e79ce7f56e870eab3f92a4646820f32a3a1e3db155d0b68d341057d0", kill_on_drop: false }`
[INFO] [stdout] 16a34261e79ce7f56e870eab3f92a4646820f32a3a1e3db155d0b68d341057d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0e7b8e9cd721a4c86fe12783dcada8fbc197aaed326a162b9be3b98a6c366a41
[INFO] running `Command { std: "docker" "start" "-a" "0e7b8e9cd721a4c86fe12783dcada8fbc197aaed326a162b9be3b98a6c366a41", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: function is never used: `guess`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/guess.rs:7:8
[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] 7 | pub fn guess() {
[INFO] [stdout] 
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-playground` (bin "rust-playground" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_playground-ee10427a12803a15)
[INFO] running `Command { std: "docker" "inspect" "0e7b8e9cd721a4c86fe12783dcada8fbc197aaed326a162b9be3b98a6c366a41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e7b8e9cd721a4c86fe12783dcada8fbc197aaed326a162b9be3b98a6c366a41", kill_on_drop: false }`
[INFO] [stdout] 0e7b8e9cd721a4c86fe12783dcada8fbc197aaed326a162b9be3b98a6c366a41