[INFO] fetching crate noria-common 0.6.0...
[INFO] documenting noria-common-0.6.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate noria-common 0.6.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate noria-common 0.6.0 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 noria-common 0.6.0
[INFO] finished tweaking crates.io crate noria-common 0.6.0
[INFO] tweaked toml for crates.io crate noria-common 0.6.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-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" "+1.46.0" "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] 1eef5c72a1d96c7a18bc22df8e15e8fc262840b7d3567a768e5bd899a311ff95
[INFO] running `Command { std: "docker" "start" "-a" "1eef5c72a1d96c7a18bc22df8e15e8fc262840b7d3567a768e5bd899a311ff95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1eef5c72a1d96c7a18bc22df8e15e8fc262840b7d3567a768e5bd899a311ff95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eef5c72a1d96c7a18bc22df8e15e8fc262840b7d3567a768e5bd899a311ff95", kill_on_drop: false }`
[INFO] [stdout] 1eef5c72a1d96c7a18bc22df8e15e8fc262840b7d3567a768e5bd899a311ff95
[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" "+1.46.0" "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] 3cfc49584d53c9cd133057f7de5de0c7d84346d7a9eabc62d7e3da668eb502d0
[INFO] running `Command { std: "docker" "start" "-a" "3cfc49584d53c9cd133057f7de5de0c7d84346d7a9eabc62d7e3da668eb502d0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling const_fn v0.4.2
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]     Checking bufstream v0.1.4
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]     Checking tower-make v0.3.0
[INFO] [stderr]    Compiling libz-sys v1.1.1
[INFO] [stderr]    Compiling standback v0.2.10
[INFO] [stderr]    Compiling time v0.2.17
[INFO] [stderr]     Checking assert_infrequent v0.1.0
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking lexical v5.2.0
[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/assert_infrequent-0.1.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling zookeeper_derive v0.4.1
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `assert_infrequent`.
[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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3cfc49584d53c9cd133057f7de5de0c7d84346d7a9eabc62d7e3da668eb502d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cfc49584d53c9cd133057f7de5de0c7d84346d7a9eabc62d7e3da668eb502d0", kill_on_drop: false }`
[INFO] [stdout] 3cfc49584d53c9cd133057f7de5de0c7d84346d7a9eabc62d7e3da668eb502d0