[INFO] cloning repository https://github.com/LDSLab/stoicheia
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LDSLab/stoicheia" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLDSLab%2Fstoicheia", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLDSLab%2Fstoicheia'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e6e6241639b419b7528232a8cb528c9985c7fb7d
[INFO] documenting LDSLab/stoicheia against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLDSLab%2Fstoicheia" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LDSLab/stoicheia on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LDSLab/stoicheia
[INFO] finished tweaking git repo https://github.com/LDSLab/stoicheia
[INFO] tweaked toml for git repo https://github.com/LDSLab/stoicheia written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/LDSLab/stoicheia already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 146ca908d1c5b93e5e8df40d6f54255ea9c4838aaa79e58d4a6d529c0ce16c11
[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" "146ca908d1c5b93e5e8df40d6f54255ea9c4838aaa79e58d4a6d529c0ce16c11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "146ca908d1c5b93e5e8df40d6f54255ea9c4838aaa79e58d4a6d529c0ce16c11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "146ca908d1c5b93e5e8df40d6f54255ea9c4838aaa79e58d4a6d529c0ce16c11", kill_on_drop: false }`
[INFO] [stdout] 146ca908d1c5b93e5e8df40d6f54255ea9c4838aaa79e58d4a6d529c0ce16c11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36b6c22116ffdab12c3e441d5f20081098a59cf10c44130d72e97176bf864718
[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" "36b6c22116ffdab12c3e441d5f20081098a59cf10c44130d72e97176bf864718", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.15
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.1
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]     Checking array-macro v1.0.4
[INFO] [stderr]    Compiling lz4-sys v1.8.3
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]    Compiling libsqlite3-sys v0.17.1
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]     Checking noisy_float v0.1.12
[INFO] [stderr]     Checking bincode v1.2.1
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]     Checking alloc-stdlib v0.2.1
[INFO] [stderr]     Checking brotli-decompressor v2.3.0
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]     Checking brotli v3.3.0
[INFO] [stderr]     Checking ndarray-stats v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling thiserror-impl v1.0.11
[INFO] [stderr]    Compiling enum-map-derive v0.4.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking enum-map v0.6.2
[INFO] [stderr]     Checking thiserror v1.0.11
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]    Compiling lz4 v1.23.1
[INFO] [stderr]     Checking rusqlite v0.21.0
[INFO] [stderr]  Documenting stoicheia v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(is_sorted, result_cloned)]
[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 `stoicheia`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-type cdylib --crate-name stoicheia src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern approx=/opt/rustwide/target/debug/deps/libapprox-4ea0b68a72353845.rmeta --extern arrayvec=/opt/rustwide/target/debug/deps/libarrayvec-a0f099b1a85deccc.rmeta --extern bincode=/opt/rustwide/target/debug/deps/libbincode-9ccec25acf1a65ce.rmeta --extern brotli=/opt/rustwide/target/debug/deps/libbrotli-43c8489300ccb904.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-01b8d633b00dffa5.rmeta --extern enum_map=/opt/rustwide/target/debug/deps/libenum_map-1e04b397ef20fba4.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-5ad68357c26dda65.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-57a7edc7f441d44c.rmeta --extern lz4=/opt/rustwide/target/debug/deps/liblz4-9c04db1de853ddab.rmeta --extern ndarray=/opt/rustwide/target/debug/deps/libndarray-25f5e6880989cab5.rmeta --extern ndarray_stats=/opt/rustwide/target/debug/deps/libndarray_stats-0556b8f36ceef3a2.rmeta --extern noisy_float=/opt/rustwide/target/debug/deps/libnoisy_float-107b2e57e568f751.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-7c1d0f3b07fd8374.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-cb72152feb001e91.rmeta --extern rusqlite=/opt/rustwide/target/debug/deps/librusqlite-bedfaabf11fb4b7f.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-ad08fc17c2d1843f.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-b8674a1bd7494b19.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-d8c96678880873e5.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-b1bb33940807047a.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "36b6c22116ffdab12c3e441d5f20081098a59cf10c44130d72e97176bf864718", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36b6c22116ffdab12c3e441d5f20081098a59cf10c44130d72e97176bf864718", kill_on_drop: false }`
[INFO] [stdout] 36b6c22116ffdab12c3e441d5f20081098a59cf10c44130d72e97176bf864718