[INFO] cloning repository https://github.com/arnfaldur/RobozzleSolver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arnfaldur/RobozzleSolver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farnfaldur%2FRobozzleSolver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farnfaldur%2FRobozzleSolver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1fef64afc10eab88ceac5b26395ef7b2e541f92e
[INFO] documenting arnfaldur/RobozzleSolver 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%2Farnfaldur%2FRobozzleSolver" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arnfaldur/RobozzleSolver 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/arnfaldur/RobozzleSolver
[INFO] finished tweaking git repo https://github.com/arnfaldur/RobozzleSolver
[INFO] tweaked toml for git repo https://github.com/arnfaldur/RobozzleSolver written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/arnfaldur/RobozzleSolver 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 39ce4e47ae012564632eed40fe171700453d0837a39ea3b9b696a63c52bbcc6a
[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" "39ce4e47ae012564632eed40fe171700453d0837a39ea3b9b696a63c52bbcc6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39ce4e47ae012564632eed40fe171700453d0837a39ea3b9b696a63c52bbcc6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39ce4e47ae012564632eed40fe171700453d0837a39ea3b9b696a63c52bbcc6a", kill_on_drop: false }`
[INFO] [stdout] 39ce4e47ae012564632eed40fe171700453d0837a39ea3b9b696a63c52bbcc6a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 8ab0f3428a198520c3501dfcbf02ac978dc5e6bcfc6d36af6659756477e99eef
[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" "8ab0f3428a198520c3501dfcbf02ac978dc5e6bcfc6d36af6659756477e99eef", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]    Compiling openssl v0.10.25
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]    Compiling winapi v0.3.8
[INFO] [stderr]     Checking tower-service v0.3.0-alpha.2
[INFO] [stderr]     Checking urlencoding v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking rgb v0.8.14
[INFO] [stderr]     Checking unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking lock_api v0.3.1
[INFO] [stderr]     Checking tokio-sync v0.1.7
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]     Checking block-padding v0.1.4
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking tracing-core v0.1.7
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]    Compiling memoffset v0.5.1
[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]     Checking base64 v0.10.1
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking bytes v0.4.12
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[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking rand_chacha v0.2.1
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[INFO] [stderr]    Compiling mime_guess v2.0.1
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[INFO] [stderr]    Compiling openssl-sys v0.9.52
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[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking tokio-sync v0.2.0-alpha.6
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[INFO] [stderr]     Checking http-body v0.2.0-alpha.3
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[INFO] [stderr]     Checking colored v1.8.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling tokio-macros v0.2.0-alpha.6
[INFO] [stderr]     Checking tracing v0.1.10
[INFO] [stderr]     Checking tokio-executor v0.2.0-alpha.6
[INFO] [stderr]     Checking pin-project v0.4.5
[INFO] [stderr]     Checking tokio-io v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-timer v0.3.0-alpha.6
[INFO] [stderr]     Checking tokio-codec v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-fs v0.2.0-alpha.6
[INFO] [stderr]     Checking tower-make v0.3.0-alpha.2a
[INFO] [stderr]     Checking tokio-tls v0.3.0-alpha.6
[INFO] [stderr]     Checking tokio-net v0.2.0-alpha.6
[INFO] [stderr]     Checking h2 v0.2.0-alpha.3
[INFO] [stderr]     Checking tokio v0.2.0-alpha.6
[INFO] [stderr]     Checking hyper v0.13.0-alpha.4
[INFO] [stderr]     Checking hyper-tls v0.4.0-alpha.4
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking warp v0.1.20
[INFO] [stderr]     Checking webdriver v0.40.2
[INFO] [stderr]     Checking fantoccini v0.12.0-alpha.4
[INFO] [stderr]  Documenting solver 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(test, vec_remove_item, core_intrinsics, cfg_target_has_atomic)]
[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 `solver`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name solver 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 colored=/opt/rustwide/target/debug/deps/libcolored-0dd8c2f10fa9e39d.rmeta --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-7d14e475e13494b4.rmeta --extern fantoccini=/opt/rustwide/target/debug/deps/libfantoccini-490dd7b3ff9ae247.rmeta --extern once_cell=/opt/rustwide/target/debug/deps/libonce_cell-2a480233f3d042eb.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-9f8ba2ae954b594c.rmeta --extern rand_pcg=/opt/rustwide/target/debug/deps/librand_pcg-20cfc915b282dd05.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-b76f947e5cc47634.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-dcdcb8a7540e7275.rmeta --extern statrs=/opt/rustwide/target/debug/deps/libstatrs-b7232078406916e1.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-a742993b9644cc7c.rmeta --extern webdriver=/opt/rustwide/target/debug/deps/libwebdriver-a15c80e20fb3e619.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "8ab0f3428a198520c3501dfcbf02ac978dc5e6bcfc6d36af6659756477e99eef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ab0f3428a198520c3501dfcbf02ac978dc5e6bcfc6d36af6659756477e99eef", kill_on_drop: false }`
[INFO] [stdout] 8ab0f3428a198520c3501dfcbf02ac978dc5e6bcfc6d36af6659756477e99eef
