[INFO] fetching crate padantic 0.1.0...
[INFO] documenting padantic-0.1.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate padantic 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate padantic 0.1.0 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 crates.io crate padantic 0.1.0
[INFO] finished tweaking crates.io crate padantic 0.1.0
[INFO] tweaked toml for crates.io crate padantic 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate padantic 0.1.0 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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 401b8a7d2b5cd7b0c87bc926fa3d83818df3067f12954c08d8b5b205e48440df
[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" "401b8a7d2b5cd7b0c87bc926fa3d83818df3067f12954c08d8b5b205e48440df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "401b8a7d2b5cd7b0c87bc926fa3d83818df3067f12954c08d8b5b205e48440df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "401b8a7d2b5cd7b0c87bc926fa3d83818df3067f12954c08d8b5b205e48440df", kill_on_drop: false }`
[INFO] [stdout] 401b8a7d2b5cd7b0c87bc926fa3d83818df3067f12954c08d8b5b205e48440df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] dd7bb0c3d9804f8a9001ecc6797fc8240eb4e8bf4f2f6acaa4b76456af86a0f3
[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" "dd7bb0c3d9804f8a9001ecc6797fc8240eb4e8bf4f2f6acaa4b76456af86a0f3", kill_on_drop: false }`
[INFO] [stderr]     Checking arc-swap v0.4.4
[INFO] [stderr]    Compiling doc-comment v0.3.2
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking parking_lot v0.10.0
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking signal-hook v0.1.13
[INFO] [stderr]     Checking crossterm v0.14.2
[INFO] [stderr]     Checking crossterm v0.16.0
[INFO] [stderr]     Checking simplelog v0.7.4
[INFO] [stderr]     Checking tui v0.8.0
[INFO] [stderr]    Compiling snafu-derive v0.6.2
[INFO] [stderr]     Checking snafu v0.6.2
[INFO] [stderr]  Documenting padantic 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(try_find)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `padantic`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name padantic 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 base64=/opt/rustwide/target/debug/deps/libbase64-2cf622753e1ddd46.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-d4a587b550fd2910.rmeta --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-6f3747cff3afdf74.rmeta --extern crossterm=/opt/rustwide/target/debug/deps/libcrossterm-1b7ed272005b5c25.rmeta --extern hex=/opt/rustwide/target/debug/deps/libhex-88b93a2a096ee79e.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f96ba0118540bef9.rmeta --extern simplelog=/opt/rustwide/target/debug/deps/libsimplelog-662849cd2c708820.rmeta --extern snafu=/opt/rustwide/target/debug/deps/libsnafu-3e86c846f56b5f27.rmeta --extern tui=/opt/rustwide/target/debug/deps/libtui-adaa00afc2753f1f.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "dd7bb0c3d9804f8a9001ecc6797fc8240eb4e8bf4f2f6acaa4b76456af86a0f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd7bb0c3d9804f8a9001ecc6797fc8240eb4e8bf4f2f6acaa4b76456af86a0f3", kill_on_drop: false }`
[INFO] [stdout] dd7bb0c3d9804f8a9001ecc6797fc8240eb4e8bf4f2f6acaa4b76456af86a0f3