[INFO] cloning repository https://github.com/Wadjetz/mindstream-poc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Wadjetz/mindstream-poc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWadjetz%2Fmindstream-poc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWadjetz%2Fmindstream-poc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 29303cfc17403c5654fbb252d5c899f8ebe113c4
[INFO] documenting Wadjetz/mindstream-poc 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%2FWadjetz%2Fmindstream-poc" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Wadjetz/mindstream-poc 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/Wadjetz/mindstream-poc
[INFO] finished tweaking git repo https://github.com/Wadjetz/mindstream-poc
[INFO] tweaked toml for git repo https://github.com/Wadjetz/mindstream-poc written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Wadjetz/mindstream-poc 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-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] 1d8202f5dda26fba90ee15b735d4923955868c57e4d964586398540e1d33e4f5
[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" "1d8202f5dda26fba90ee15b735d4923955868c57e4d964586398540e1d33e4f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d8202f5dda26fba90ee15b735d4923955868c57e4d964586398540e1d33e4f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d8202f5dda26fba90ee15b735d4923955868c57e4d964586398540e1d33e4f5", kill_on_drop: false }`
[INFO] [stdout] 1d8202f5dda26fba90ee15b735d4923955868c57e4d964586398540e1d33e4f5
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7c70fcd6419773ba488b96d5508b4a50956f3157cfe0300b3504fbba3758401a
[INFO] running `Command { std: "docker" "start" "-a" "7c70fcd6419773ba488b96d5508b4a50956f3157cfe0300b3504fbba3758401a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.36
[INFO] [stderr]    Compiling serde v1.0.27
[INFO] [stderr]    Compiling num-traits v0.2.0
[INFO] [stderr]    Compiling yansi v0.3.4
[INFO] [stderr]    Compiling typenum v1.9.0
[INFO] [stderr]    Compiling pq-sys v0.4.4
[INFO] [stderr]    Compiling dtoa v0.4.2
[INFO] [stderr]     Checking constant_time_eq v0.1.3
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]     Checking arrayref v0.3.4
[INFO] [stderr]    Compiling untrusted v0.5.1
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling build_const v0.2.0
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking serde v0.9.15
[INFO] [stderr]     Checking antidote v1.0.0
[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/yansi-0.3.4/src/lib.rs:1:32
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature="nightly", feature(const_atomic_bool_new))]
[INFO] [stdout]   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking md5 v0.3.7
[INFO] [stderr]     Checking utf-8 v0.7.2
[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]    Compiling utf8-ranges v1.0.0
[INFO] [stderr] error: could not compile `yansi`.
[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" "7c70fcd6419773ba488b96d5508b4a50956f3157cfe0300b3504fbba3758401a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c70fcd6419773ba488b96d5508b4a50956f3157cfe0300b3504fbba3758401a", kill_on_drop: false }`
[INFO] [stdout] 7c70fcd6419773ba488b96d5508b4a50956f3157cfe0300b3504fbba3758401a