[INFO] cloning repository https://github.com/zoewithabang/rust-markov-chain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zoewithabang/rust-markov-chain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzoewithabang%2Frust-markov-chain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzoewithabang%2Frust-markov-chain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf3658652f55d8bfc018ff0b598741a6c2892429
[INFO] testing zoewithabang/rust-markov-chain against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzoewithabang%2Frust-markov-chain" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zoewithabang/rust-markov-chain on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zoewithabang/rust-markov-chain
[INFO] finished tweaking git repo https://github.com/zoewithabang/rust-markov-chain
[INFO] tweaked toml for git repo https://github.com/zoewithabang/rust-markov-chain written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/zoewithabang/rust-markov-chain already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bit-vec v0.5.1
[INFO] [stderr]   Downloaded sha2 v0.8.0
[INFO] [stderr]   Downloaded block-padding v0.1.3
[INFO] [stderr]   Downloaded lexical-core v0.4.0
[INFO] [stderr]   Downloaded static_assertions v0.2.5
[INFO] [stderr]   Downloaded lexical v2.1.0
[INFO] [stderr]   Downloaded nix v0.13.0
[INFO] [stderr]   Downloaded twox-hash v1.2.0
[INFO] [stderr]   Downloaded stackvector v1.0.2
[INFO] [stderr]   Downloaded mysql_common v0.17.0
[INFO] [stderr]   Downloaded mysql v16.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f9251d7df5daa4fd7982fa12b96f50b25c8432d753ed999f407933df93d3b56
[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" "5f9251d7df5daa4fd7982fa12b96f50b25c8432d753ed999f407933df93d3b56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f9251d7df5daa4fd7982fa12b96f50b25c8432d753ed999f407933df93d3b56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f9251d7df5daa4fd7982fa12b96f50b25c8432d753ed999f407933df93d3b56", kill_on_drop: false }`
[INFO] [stdout] 5f9251d7df5daa4fd7982fa12b96f50b25c8432d753ed999f407933df93d3b56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba73441afd5eaa0fc66557732239eefe33c8fbb883deed4835739ed5598abfcd
[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" "ba73441afd5eaa0fc66557732239eefe33c8fbb883deed4835739ed5598abfcd", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]    Compiling cfg-if v0.1.7
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling syn v0.15.32
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling serde v1.0.90
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling smallvec v0.6.9
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling static_assertions v0.2.5
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling nix v0.13.0
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]    Compiling rustc-demangle v0.1.14
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling opaque-debug v0.2.2
[INFO] [stderr]    Compiling sha1 v0.6.0
[INFO] [stderr]    Compiling mysql v16.0.0
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling bufstream v0.1.4
[INFO] [stderr]    Compiling indexmap v1.0.2
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.6.6
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.3
[INFO] [stderr]    Compiling block-padding v0.1.3
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling unicode-normalization v0.1.8
[INFO] [stderr]    Compiling stackvector v1.0.2
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling unicase v2.3.0
[INFO] [stderr]    Compiling lexical-core v0.4.0
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling flate2 v1.0.7
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling twox-hash v1.2.0
[INFO] [stderr]    Compiling lexical v2.1.0
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]    Compiling mysql_common v0.17.0
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling dotenv v0.13.0
[INFO] [stderr]    Compiling markov v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `prefix_size`
[INFO] [stdout]   --> src/markov.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     prefix_size: &u32,
[INFO] [stdout]    |     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prefix_size`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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 1m 38s
[INFO] running `Command { std: "docker" "inspect" "ba73441afd5eaa0fc66557732239eefe33c8fbb883deed4835739ed5598abfcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba73441afd5eaa0fc66557732239eefe33c8fbb883deed4835739ed5598abfcd", kill_on_drop: false }`
[INFO] [stdout] ba73441afd5eaa0fc66557732239eefe33c8fbb883deed4835739ed5598abfcd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44364da3f89aa4da6cea674f5422279c569252556e97630a9a8da20d0a4bfee8
[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" "44364da3f89aa4da6cea674f5422279c569252556e97630a9a8da20d0a4bfee8", kill_on_drop: false }`
[INFO] [stderr]    Compiling markov v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `prefix_size`
[INFO] [stdout]   --> src/markov.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     prefix_size: &u32,
[INFO] [stdout]    |     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prefix_size`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `output`
[INFO] [stdout]   --> src/markov_table.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let output = build_markov_table(source_messages, prefix_size);
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.71s
[INFO] running `Command { std: "docker" "inspect" "44364da3f89aa4da6cea674f5422279c569252556e97630a9a8da20d0a4bfee8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44364da3f89aa4da6cea674f5422279c569252556e97630a9a8da20d0a4bfee8", kill_on_drop: false }`
[INFO] [stdout] 44364da3f89aa4da6cea674f5422279c569252556e97630a9a8da20d0a4bfee8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] fa3beb66d5079d86928b371a74d102f1930852edfc38df8c8ffa11d57d267383
[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" "fa3beb66d5079d86928b371a74d102f1930852edfc38df8c8ffa11d57d267383", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `prefix_size`
[INFO] [stderr]   --> src/markov.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     prefix_size: &u32,
[INFO] [stderr]    |     ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prefix_size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]   --> src/markov_table.rs:93:13
[INFO] [stderr]    |
[INFO] [stderr] 93 |         let output = build_markov_table(source_messages, prefix_size);
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_output`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/markov-4ad2f8bb6ebc1487
[INFO] [stdout] running 3 tests
[INFO] [stdout] test markov_table::markov_table_tests::build_markov_table_initial_test ... ok
[INFO] [stdout] test markov::markov_tests::get_initial_prefix_test ... ok
[INFO] [stdout] test markov_table::markov_table_tests::time_for_large_message_pool ... test markov_table::markov_table_tests::time_for_large_message_pool has been running for over 60 seconds
[INFO] [stdout] test markov_table::markov_table_tests::time_for_large_message_pool ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 61.30s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fa3beb66d5079d86928b371a74d102f1930852edfc38df8c8ffa11d57d267383", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa3beb66d5079d86928b371a74d102f1930852edfc38df8c8ffa11d57d267383", kill_on_drop: false }`
[INFO] [stdout] fa3beb66d5079d86928b371a74d102f1930852edfc38df8c8ffa11d57d267383