[INFO] updating cached repository https://github.com/dan-f/blockchain
[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] 4d86b044e1da1625b51e69c1564b6c388c9c8834
[INFO] testing dan-f/blockchain 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%2Fdan-f%2Fblockchain" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dan-f/blockchain 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/dan-f/blockchain
[INFO] finished tweaking git repo https://github.com/dan-f/blockchain
[INFO] tweaked toml for git repo https://github.com/dan-f/blockchain written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/dan-f/blockchain 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 7e34c456623269d439e69d565c361d363601a9eba72c1f85c2f4ae81a5f87293
[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" "7e34c456623269d439e69d565c361d363601a9eba72c1f85c2f4ae81a5f87293", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e34c456623269d439e69d565c361d363601a9eba72c1f85c2f4ae81a5f87293", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e34c456623269d439e69d565c361d363601a9eba72c1f85c2f4ae81a5f87293", kill_on_drop: false }`
[INFO] [stdout] 7e34c456623269d439e69d565c361d363601a9eba72c1f85c2f4ae81a5f87293
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 1505c31c2ac21477549e9d3098c6c891c427932b5731d672d5f04c69e3901ebf
[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" "1505c31c2ac21477549e9d3098c6c891c427932b5731d672d5f04c69e3901ebf", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling libc v0.2.42
[INFO] [stderr]    Compiling openssl v0.10.10
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling serde v1.0.66
[INFO] [stderr]    Compiling lazy_static v1.0.1
[INFO] [stderr]    Compiling bitflags v1.0.3
[INFO] [stderr]    Compiling cfg-if v0.1.3
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling byteorder v1.2.3
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.6
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]    Compiling openssl-sys v0.9.33
[INFO] [stderr]    Compiling serde_derive v1.0.66
[INFO] [stderr]    Compiling crypto-hash v0.3.1
[INFO] [stderr]    Compiling bincode v1.0.0
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.48s
[INFO] running `Command { std: "docker" "inspect" "1505c31c2ac21477549e9d3098c6c891c427932b5731d672d5f04c69e3901ebf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1505c31c2ac21477549e9d3098c6c891c427932b5731d672d5f04c69e3901ebf", kill_on_drop: false }`
[INFO] [stdout] 1505c31c2ac21477549e9d3098c6c891c427932b5731d672d5f04c69e3901ebf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8d26d6f3e0b98491ba3c9d1591f3b3456ed99c6883740da78552dc11b0ff0293
[INFO] running `Command { std: "docker" "start" "-a" "8d26d6f3e0b98491ba3c9d1591f3b3456ed99c6883740da78552dc11b0ff0293", kill_on_drop: false }`
[INFO] [stderr]    Compiling blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.49s
[INFO] running `Command { std: "docker" "inspect" "8d26d6f3e0b98491ba3c9d1591f3b3456ed99c6883740da78552dc11b0ff0293", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d26d6f3e0b98491ba3c9d1591f3b3456ed99c6883740da78552dc11b0ff0293", kill_on_drop: false }`
[INFO] [stdout] 8d26d6f3e0b98491ba3c9d1591f3b3456ed99c6883740da78552dc11b0ff0293
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] [stdout] 933e8dd2e50c3b60ca406e4897690b50a119f151a931b4094de49493fecb233a
[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" "933e8dd2e50c3b60ca406e4897690b50a119f151a931b4094de49493fecb233a", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/blockchain-502c4e62c2bac303
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test list::tests::list_is_a_stack ... ok
[INFO] [stdout] test list::tests::list_can_branch ... ok
[INFO] [stdout] test list::tests::list_has_a_length ... ok
[INFO] [stdout] test list::tests::new_list_is_empty ... ok
[INFO] [stdout] test block::tests::it_constructs_a_genesis_block ... ok
[INFO] [stdout] test blockchain::tests::blockchain_will_not_add_block_with_wrong_prev_hash ... ok
[INFO] [stdout] test blockchain::tests::new_blockchain_uses_genesis_block ... ok
[INFO] [stdout] test blockchain::tests::blockchain_will_not_add_block_with_unacceptable_proof_of_work ... ok
[INFO] [stdout] test blockchain::tests::blockchain_can_add_block ... ok
[INFO] [stdout] test blockchain::tests::blockchain_can_mine_block ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests blockchain
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "933e8dd2e50c3b60ca406e4897690b50a119f151a931b4094de49493fecb233a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "933e8dd2e50c3b60ca406e4897690b50a119f151a931b4094de49493fecb233a", kill_on_drop: false }`
[INFO] [stdout] 933e8dd2e50c3b60ca406e4897690b50a119f151a931b4094de49493fecb233a