[INFO] cloning repository https://github.com/shiki-tak/introduction_to_network_programming_with_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shiki-tak/introduction_to_network_programming_with_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshiki-tak%2Fintroduction_to_network_programming_with_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshiki-tak%2Fintroduction_to_network_programming_with_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 30e4589e1678054762e39c70e8e4349fe3499ced
[INFO] testing shiki-tak/introduction_to_network_programming_with_rust against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshiki-tak%2Fintroduction_to_network_programming_with_rust" "/workspace/builds/worker-61/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-61/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shiki-tak/introduction_to_network_programming_with_rust 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/shiki-tak/introduction_to_network_programming_with_rust
[INFO] finished tweaking git repo https://github.com/shiki-tak/introduction_to_network_programming_with_rust
[INFO] tweaked toml for git repo https://github.com/shiki-tak/introduction_to_network_programming_with_rust written to /workspace/builds/worker-61/source/Cargo.toml
[INFO] crate git repo https://github.com/shiki-tak/introduction_to_network_programming_with_rust 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/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] 38200c600f6faa99328b6d41a9be30c42947b584cb98de75d9dacaf147ed37fb
[INFO] running `Command { std: "docker" "start" "-a" "38200c600f6faa99328b6d41a9be30c42947b584cb98de75d9dacaf147ed37fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38200c600f6faa99328b6d41a9be30c42947b584cb98de75d9dacaf147ed37fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38200c600f6faa99328b6d41a9be30c42947b584cb98de75d9dacaf147ed37fb", kill_on_drop: false }`
[INFO] [stdout] 38200c600f6faa99328b6d41a9be30c42947b584cb98de75d9dacaf147ed37fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/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] d21cf27fbd9785c6ce9ca4d18f8a276b1668c3384f5d29404c6fab1cd5e55e38
[INFO] running `Command { std: "docker" "start" "-a" "d21cf27fbd9785c6ce9ca4d18f8a276b1668c3384f5d29404c6fab1cd5e55e38", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.13
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling syn v1.0.23
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling gimli v0.21.0
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling object v0.19.0
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling humantime v1.3.0
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling regex v1.3.7
[INFO] [stderr]    Compiling addr2line v0.12.1
[INFO] [stderr]    Compiling backtrace v0.3.48
[INFO] [stderr]    Compiling env_logger v0.6.2
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling socket-programming v0.1.0 (/opt/rustwide/workdir/socket-programming)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.99s
[INFO] running `Command { std: "docker" "inspect" "d21cf27fbd9785c6ce9ca4d18f8a276b1668c3384f5d29404c6fab1cd5e55e38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d21cf27fbd9785c6ce9ca4d18f8a276b1668c3384f5d29404c6fab1cd5e55e38", kill_on_drop: false }`
[INFO] [stdout] d21cf27fbd9785c6ce9ca4d18f8a276b1668c3384f5d29404c6fab1cd5e55e38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/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] [stdout] e5b32697b52ef0bbf50867c75c215bfe91f00d42ecd4b48849fa7c5d84921967
[INFO] running `Command { std: "docker" "start" "-a" "e5b32697b52ef0bbf50867c75c215bfe91f00d42ecd4b48849fa7c5d84921967", kill_on_drop: false }`
[INFO] [stderr]    Compiling socket-programming v0.1.0 (/opt/rustwide/workdir/socket-programming)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "e5b32697b52ef0bbf50867c75c215bfe91f00d42ecd4b48849fa7c5d84921967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5b32697b52ef0bbf50867c75c215bfe91f00d42ecd4b48849fa7c5d84921967", kill_on_drop: false }`
[INFO] [stdout] e5b32697b52ef0bbf50867c75c215bfe91f00d42ecd4b48849fa7c5d84921967
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/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] [stdout] e3c3f65356ac0193346765c6f8bec48b15eae1d9daf2d7c3b2ee048ab37c9175
[INFO] running `Command { std: "docker" "start" "-a" "e3c3f65356ac0193346765c6f8bec48b15eae1d9daf2d7c3b2ee048ab37c9175", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.78s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/socket_programming-c26d94e4f536a590)
[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" "e3c3f65356ac0193346765c6f8bec48b15eae1d9daf2d7c3b2ee048ab37c9175", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3c3f65356ac0193346765c6f8bec48b15eae1d9daf2d7c3b2ee048ab37c9175", kill_on_drop: false }`
[INFO] [stdout] e3c3f65356ac0193346765c6f8bec48b15eae1d9daf2d7c3b2ee048ab37c9175