[INFO] cloning repository https://github.com/iameva/boardbots-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iameva/boardbots-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiameva%2Fboardbots-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiameva%2Fboardbots-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 086843d02661324e3a7143b71bc0a0ba0160de4d
[INFO] documenting iameva/boardbots-rust against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiameva%2Fboardbots-rust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iameva/boardbots-rust on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iameva/boardbots-rust
[INFO] finished tweaking git repo https://github.com/iameva/boardbots-rust
[INFO] tweaked toml for git repo https://github.com/iameva/boardbots-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/iameva/boardbots-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 947e0dc179141766c7dad606842b012670fa4f44cddb6bf3b38473c40c3f0479
[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" "947e0dc179141766c7dad606842b012670fa4f44cddb6bf3b38473c40c3f0479", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "947e0dc179141766c7dad606842b012670fa4f44cddb6bf3b38473c40c3f0479", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "947e0dc179141766c7dad606842b012670fa4f44cddb6bf3b38473c40c3f0479", kill_on_drop: false }`
[INFO] [stdout] 947e0dc179141766c7dad606842b012670fa4f44cddb6bf3b38473c40c3f0479
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "RUSTDOCFLAGS=--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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b00a44dac089d1deb8bedc86fe652c8a9e5dd28ee4adc20bcfc36502d0c3a79
[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" "7b00a44dac089d1deb8bedc86fe652c8a9e5dd28ee4adc20bcfc36502d0c3a79", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]     Checking smallvec v1.3.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
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[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling serde v1.0.106
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[INFO] [stderr]    Compiling encoding_rs v0.8.22
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[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]     Checking unicode-normalization v0.1.12
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[INFO] [stderr]    Compiling unicase v2.6.0
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[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking foreign-types v0.3.2
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[INFO] [stderr]    Compiling rand_hc v0.1.0
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[INFO] [stderr]     Checking log v0.3.9
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[INFO] [stderr]    Compiling rand_chacha v0.1.1
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[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]    Compiling lexical-core v0.6.7
[INFO] [stderr]     Checking twoway v0.1.8
[INFO] [stderr]     Checking buf_redux v0.8.4
[INFO] [stderr]     Checking smallvec v0.6.13
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[INFO] [stderr]    Compiling openssl-sys v0.9.55
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.12.0
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[INFO] [stderr]     Checking rand_os v0.1.3
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[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
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[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking url v1.7.2
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[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking headers-core v0.2.0
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[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking backtrace v0.3.41
[INFO] [stderr]     Checking headers v0.3.2
[INFO] [stderr]     Checking publicsuffix v1.5.4
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling mime_guess v1.8.8
[INFO] [stderr]     Checking tungstenite v0.10.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking multipart v0.16.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]     Checking tokio v0.2.17
[INFO] [stderr]     Checking failure v0.1.7
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking pin-project v0.4.8
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tungstenite v0.10.1
[INFO] [stderr]     Checking h2 v0.2.4
[INFO] [stderr]     Checking hyper v0.13.4
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking warp v0.2.2
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr]  Documenting quoridor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `quoridor`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name quoridor src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern failure=/opt/rustwide/target/debug/deps/libfailure-fa2aa87f1fef2dec.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-6f7e12abe5792851.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-f162b8fed82d56a0.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-be3ac6c2d151a8aa.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-fa7240491c4e26aa.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-cc493cdcdc3605e3.rmeta --extern warp=/opt/rustwide/target/debug/deps/libwarp-00a5089acece86b7.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "7b00a44dac089d1deb8bedc86fe652c8a9e5dd28ee4adc20bcfc36502d0c3a79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b00a44dac089d1deb8bedc86fe652c8a9e5dd28ee4adc20bcfc36502d0c3a79", kill_on_drop: false }`
[INFO] [stdout] 7b00a44dac089d1deb8bedc86fe652c8a9e5dd28ee4adc20bcfc36502d0c3a79
