[INFO] cloning repository https://github.com/rukarangi/rust-programming-techniques
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rukarangi/rust-programming-techniques" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frukarangi%2Frust-programming-techniques", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frukarangi%2Frust-programming-techniques'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 89256df4b5272a0ced1446257e461f63e5ba5dcb
[INFO] testing rukarangi/rust-programming-techniques against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frukarangi%2Frust-programming-techniques" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rukarangi/rust-programming-techniques on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rukarangi/rust-programming-techniques
[INFO] finished tweaking git repo https://github.com/rukarangi/rust-programming-techniques
[INFO] tweaked toml for git repo https://github.com/rukarangi/rust-programming-techniques written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/rukarangi/rust-programming-techniques already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 267a35b81d1f7e8d36bf814d6c13e31fa94e746cbfe3f11d350348617b16a5ac
[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" "267a35b81d1f7e8d36bf814d6c13e31fa94e746cbfe3f11d350348617b16a5ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "267a35b81d1f7e8d36bf814d6c13e31fa94e746cbfe3f11d350348617b16a5ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "267a35b81d1f7e8d36bf814d6c13e31fa94e746cbfe3f11d350348617b16a5ac", kill_on_drop: false }`
[INFO] [stdout] 267a35b81d1f7e8d36bf814d6c13e31fa94e746cbfe3f11d350348617b16a5ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f24ac83920421ca153e31b460ded2031f950615fa53f7252a635f67c0131adf
[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" "5f24ac83920421ca153e31b460ded2031f950615fa53f7252a635f67c0131adf", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-programming-techniques v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "5f24ac83920421ca153e31b460ded2031f950615fa53f7252a635f67c0131adf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f24ac83920421ca153e31b460ded2031f950615fa53f7252a635f67c0131adf", kill_on_drop: false }`
[INFO] [stdout] 5f24ac83920421ca153e31b460ded2031f950615fa53f7252a635f67c0131adf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.55.0" "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] d17d9d01c7ebddde406a9880ac39deeec8e2290b8278351357e120d31d3849d1
[INFO] running `Command { std: "docker" "start" "-a" "d17d9d01c7ebddde406a9880ac39deeec8e2290b8278351357e120d31d3849d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-programming-techniques v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "d17d9d01c7ebddde406a9880ac39deeec8e2290b8278351357e120d31d3849d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d17d9d01c7ebddde406a9880ac39deeec8e2290b8278351357e120d31d3849d1", kill_on_drop: false }`
[INFO] [stdout] d17d9d01c7ebddde406a9880ac39deeec8e2290b8278351357e120d31d3849d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1.55.0" "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] 1c566f2168ee269d186fb7f2d894a92f9bc4206f1207bacf4dd072da37e92662
[INFO] running `Command { std: "docker" "start" "-a" "1c566f2168ee269d186fb7f2d894a92f9bc4206f1207bacf4dd072da37e92662", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_programming_techniques-ea2982c6bbdfec8f)
[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" "1c566f2168ee269d186fb7f2d894a92f9bc4206f1207bacf4dd072da37e92662", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c566f2168ee269d186fb7f2d894a92f9bc4206f1207bacf4dd072da37e92662", kill_on_drop: false }`
[INFO] [stdout] 1c566f2168ee269d186fb7f2d894a92f9bc4206f1207bacf4dd072da37e92662