[INFO] updating cached 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" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf3658652f55d8bfc018ff0b598741a6c2892429
[INFO] testing zoewithabang/rust-markov-chain against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzoewithabang%2Frust-markov-chain" "/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/zoewithabang/rust-markov-chain on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "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-3/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-2020-07-24" "fetch" "--locked" "--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-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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b0f2c344a88b62cd9f97a5f0cb01c22e9e7281c1c7af7ed52772de52dd220eeb
[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" "b0f2c344a88b62cd9f97a5f0cb01c22e9e7281c1c7af7ed52772de52dd220eeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0f2c344a88b62cd9f97a5f0cb01c22e9e7281c1c7af7ed52772de52dd220eeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0f2c344a88b62cd9f97a5f0cb01c22e9e7281c1c7af7ed52772de52dd220eeb", kill_on_drop: false }`
[INFO] [stdout] b0f2c344a88b62cd9f97a5f0cb01c22e9e7281c1c7af7ed52772de52dd220eeb
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a60214ca7f5dd0fc59c7d0bca21fb24c9e5c843d6149c8f0d1bb086fc4d14dd0
[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" "a60214ca7f5dd0fc59c7d0bca21fb24c9e5c843d6149c8f0d1bb086fc4d14dd0", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling syn v0.15.32
[INFO] [stderr]    Compiling static_assertions v0.2.5
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling mysql v16.0.0
[INFO] [stderr]    Compiling bufstream v0.1.4
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling block-padding v0.1.3
[INFO] [stderr]    Compiling unicase v2.3.0
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling stackvector v1.0.2
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]    Compiling twox-hash v1.2.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling lexical-core v0.4.0
[INFO] [stderr]    Compiling flate2 v1.0.7
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling lexical v2.1.0
[INFO] [stderr]    Compiling mysql_common v0.17.0
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[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 35.48s
[INFO] running `Command { std: "docker" "inspect" "a60214ca7f5dd0fc59c7d0bca21fb24c9e5c843d6149c8f0d1bb086fc4d14dd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a60214ca7f5dd0fc59c7d0bca21fb24c9e5c843d6149c8f0d1bb086fc4d14dd0", kill_on_drop: false }`
[INFO] [stdout] a60214ca7f5dd0fc59c7d0bca21fb24c9e5c843d6149c8f0d1bb086fc4d14dd0
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 716f2e256f3ecd8603d9db0daf7a8b962a1b04bd2f05fd2e075ac6b7a4c385e1
[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" "716f2e256f3ecd8603d9db0daf7a8b962a1b04bd2f05fd2e075ac6b7a4c385e1", 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 2.89s
[INFO] running `Command { std: "docker" "inspect" "716f2e256f3ecd8603d9db0daf7a8b962a1b04bd2f05fd2e075ac6b7a4c385e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "716f2e256f3ecd8603d9db0daf7a8b962a1b04bd2f05fd2e075ac6b7a4c385e1", kill_on_drop: false }`
[INFO] [stdout] 716f2e256f3ecd8603d9db0daf7a8b962a1b04bd2f05fd2e075ac6b7a4c385e1
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "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] dd1b38cf63354efe15268151271f1764d5a7b671dad3984a5359bb65be6c49c8
[INFO] running `Command { std: "docker" "start" "-a" "dd1b38cf63354efe15268151271f1764d5a7b671dad3984a5359bb65be6c49c8", 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 0.41s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/markov-a9e64446e19a8475
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test markov::markov_tests::get_initial_prefix_test ... ok
[INFO] [stdout] test markov_table::markov_table_tests::build_markov_table_initial_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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "dd1b38cf63354efe15268151271f1764d5a7b671dad3984a5359bb65be6c49c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd1b38cf63354efe15268151271f1764d5a7b671dad3984a5359bb65be6c49c8", kill_on_drop: false }`
[INFO] [stdout] dd1b38cf63354efe15268151271f1764d5a7b671dad3984a5359bb65be6c49c8