[INFO] fetching crate rustimate 0.1.0...
[INFO] documenting rustimate-0.1.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate rustimate 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rustimate 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 rustimate 0.1.0
[INFO] finished tweaking crates.io crate rustimate 0.1.0
[INFO] tweaked toml for crates.io crate rustimate 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate rustimate 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] [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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 1e52fdc64e99430a022b4fd076d1e0ed17b5492f8322ca5ca5fe52926af54dd7
[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" "1e52fdc64e99430a022b4fd076d1e0ed17b5492f8322ca5ca5fe52926af54dd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e52fdc64e99430a022b4fd076d1e0ed17b5492f8322ca5ca5fe52926af54dd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e52fdc64e99430a022b4fd076d1e0ed17b5492f8322ca5ca5fe52926af54dd7", kill_on_drop: false }`
[INFO] [stdout] 1e52fdc64e99430a022b4fd076d1e0ed17b5492f8322ca5ca5fe52926af54dd7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] ea08349d2d71811a806440b11ce68a318cfec31ac59e9bb1a26bc237e341bb16
[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" "ea08349d2d71811a806440b11ce68a318cfec31ac59e9bb1a26bc237e341bb16", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]     Checking smallvec v0.6.11
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]     Checking copyless v0.1.4
[INFO] [stderr]     Checking linked-hash-map v0.5.2
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]     Checking arc-swap v0.4.3
[INFO] [stderr]    Compiling encoding_rs v0.8.20
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]     Checking untrusted v0.6.2
[INFO] [stderr]    Compiling same-file v1.0.5
[INFO] [stderr]    Compiling shellexpand v1.0.0
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0
[INFO] [stderr]     Checking hashbrown v0.3.1
[INFO] [stderr]     Checking hashbrown v0.5.0
[INFO] [stderr]     Checking xdg v2.2.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking lock_api v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking tokio-sync v0.1.7
[INFO] [stderr]     Checking actix-service v0.4.2
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]    Compiling walkdir v2.2.9
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking anyhow v1.0.26
[INFO] [stderr]     Checking app_dirs2 v2.0.4
[INFO] [stderr]     Checking tokio-executor v0.1.8
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking socket2 v0.3.11
[INFO] [stderr]     Checking signal-hook-registry v1.1.1
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]    Compiling num_cpus v1.11.1
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling jobserver v0.1.17
[INFO] [stderr]    Compiling rust-embed-utils v5.0.0
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking tokio-timer v0.2.11
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking resolv-conf v0.6.2
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking signal-hook v0.1.11
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]     Checking slog-async v2.3.0
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]    Compiling enum-as-inner v0.2.1
[INFO] [stderr]    Compiling maud_macros v0.21.0
[INFO] [stderr]    Compiling actix_derive v0.4.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/maud_macros-0.21.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_def_site)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/maud_macros-0.21.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling derive_more v0.14.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/maud_macros-0.21.0/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/maud_macros-0.21.0/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(proc_macro_quote)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/maud_macros-0.21.0/src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(proc_macro_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `maud_macros`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ea08349d2d71811a806440b11ce68a318cfec31ac59e9bb1a26bc237e341bb16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea08349d2d71811a806440b11ce68a318cfec31ac59e9bb1a26bc237e341bb16", kill_on_drop: false }`
[INFO] [stdout] ea08349d2d71811a806440b11ce68a318cfec31ac59e9bb1a26bc237e341bb16