[INFO] cloning repository https://github.com/d6e/filecabinet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/d6e/filecabinet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd6e%2Ffilecabinet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fd6e%2Ffilecabinet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 84f6225c7ce3c6aaa361c525ed0fe1e85d79c65d
[INFO] documenting d6e/filecabinet 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%2Fd6e%2Ffilecabinet" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/d6e/filecabinet 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/d6e/filecabinet
[INFO] finished tweaking git repo https://github.com/d6e/filecabinet
[INFO] tweaked toml for git repo https://github.com/d6e/filecabinet written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/d6e/filecabinet 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c726fef8d16e6c0b9efb14e7f3630889e2f6e95b2ee95d9305257507a4489434
[INFO] running `Command { std: "docker" "start" "-a" "c726fef8d16e6c0b9efb14e7f3630889e2f6e95b2ee95d9305257507a4489434", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c726fef8d16e6c0b9efb14e7f3630889e2f6e95b2ee95d9305257507a4489434", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c726fef8d16e6c0b9efb14e7f3630889e2f6e95b2ee95d9305257507a4489434", kill_on_drop: false }`
[INFO] [stdout] c726fef8d16e6c0b9efb14e7f3630889e2f6e95b2ee95d9305257507a4489434
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3d25a4eab49de4cdb90a15067c514e9870f2d47ce424fb88b7eb92db49fdbcc0
[INFO] running `Command { std: "docker" "start" "-a" "3d25a4eab49de4cdb90a15067c514e9870f2d47ce424fb88b7eb92db49fdbcc0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking headers-core v0.2.0
[INFO] [stderr]     Checking syn v1.0.39
[INFO] [stderr]     Checking chacha20 v0.3.4
[INFO] [stderr]    Compiling parse-zoneinfo v0.3.0
[INFO] [stderr]    Compiling async-trait v0.1.38
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]     Checking poly1305 v0.5.2
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking pbkdf2 v0.3.0
[INFO] [stderr]     Checking tungstenite v0.10.1
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking globwalk v0.8.0
[INFO] [stderr]     Checking multipart v0.16.1
[INFO] [stderr]     Checking headers v0.3.2
[INFO] [stderr]     Checking chacha20poly1305 v0.4.1
[INFO] [stderr]     Checking cocoon v0.1.11
[INFO] [stderr]    Compiling chrono-tz v0.5.2
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking askama_shared v0.10.4
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking mobc v0.5.12
[INFO] [stderr]     Checking tokio-tungstenite v0.10.1
[INFO] [stderr]     Checking h2 v0.2.6
[INFO] [stderr]     Checking tokio-postgres v0.5.5
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]     Checking mobc-postgres v0.5.0
[INFO] [stderr]     Checking hyper v0.13.7
[INFO] [stderr]     Checking tera v1.5.0
[INFO] [stderr]    Compiling askama_derive v0.10.3
[INFO] [stderr]     Checking warp v0.2.4
[INFO] [stderr]     Checking askama v0.10.3
[INFO] [stderr]  Documenting filecabinet 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(proc_macro_hygiene, decl_macro)]
[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 `filecabinet`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name filecabinet 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 askama=/opt/rustwide/target/debug/deps/libaskama-72d6d4735d0ca1e7.rmeta --extern askama_derive=/opt/rustwide/target/debug/deps/libaskama_derive-c4036cc6a782634c.so --extern chrono=/opt/rustwide/target/debug/deps/libchrono-89b118c80bf1462f.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-5e80f06216331e5d.rmeta --extern cocoon=/opt/rustwide/target/debug/deps/libcocoon-e7d09cdcf23bdfb1.rmeta --extern error_chain=/opt/rustwide/target/debug/deps/liberror_chain-ca69d028f014db35.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-91c2b32d0ceb9511.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-0c18a9a7e3816bae.rmeta --extern mobc=/opt/rustwide/target/debug/deps/libmobc-a1408d5c96d7adc1.rmeta --extern mobc_postgres=/opt/rustwide/target/debug/deps/libmobc_postgres-cc1bf244291da582.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-9de4bdcd0d606d7b.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-99af53deeeec9972.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-b4664b808decbd3a.rmeta --extern tera=/opt/rustwide/target/debug/deps/libtera-5e0924c13e3b935a.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-3a9d797e3488afb0.rmeta --extern warp=/opt/rustwide/target/debug/deps/libwarp-6534b1b9c0d06b5c.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "3d25a4eab49de4cdb90a15067c514e9870f2d47ce424fb88b7eb92db49fdbcc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d25a4eab49de4cdb90a15067c514e9870f2d47ce424fb88b7eb92db49fdbcc0", kill_on_drop: false }`
[INFO] [stdout] 3d25a4eab49de4cdb90a15067c514e9870f2d47ce424fb88b7eb92db49fdbcc0