[INFO] cloning repository https://github.com/Syfaro/foxbot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Syfaro/foxbot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSyfaro%2Ffoxbot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSyfaro%2Ffoxbot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2942a98916277dc1f3e3ddc04a0c4d6b384b09e9
[INFO] documenting Syfaro/foxbot 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%2FSyfaro%2Ffoxbot" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Syfaro/foxbot 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/Syfaro/foxbot
[INFO] finished tweaking git repo https://github.com/Syfaro/foxbot
[INFO] tweaked toml for git repo https://github.com/Syfaro/foxbot written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/Syfaro/foxbot 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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] d4a4ccb7cc045415faed007c039abe964d70e565840f0521f36b83a047409cad
[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" "d4a4ccb7cc045415faed007c039abe964d70e565840f0521f36b83a047409cad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4a4ccb7cc045415faed007c039abe964d70e565840f0521f36b83a047409cad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4a4ccb7cc045415faed007c039abe964d70e565840f0521f36b83a047409cad", kill_on_drop: false }`
[INFO] [stdout] d4a4ccb7cc045415faed007c039abe964d70e565840f0521f36b83a047409cad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 8692a5f7afbe9d6457a25428bb44c21626faa860cb3c89c44af7a64426f335ce
[INFO] running `Command { std: "docker" "start" "-a" "8692a5f7afbe9d6457a25428bb44c21626faa860cb3c89c44af7a64426f335ce", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling once_cell v1.4.0
[INFO] [stderr]    Compiling cpuid-bool v0.1.2
[INFO] [stderr]    Compiling protobuf v2.16.2
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling prometheus v0.7.0
[INFO] [stderr]    Compiling fallible-iterator v0.2.0
[INFO] [stderr]    Compiling instant v0.1.6
[INFO] [stderr]     Checking strength_reduce v0.2.3
[INFO] [stderr]     Checking zeroize v1.1.0
[INFO] [stderr]    Compiling metrics v0.12.1
[INFO] [stderr]    Compiling barrel v0.5.8
[INFO] [stderr]     Checking unindent v0.1.6
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]     Checking infer v0.2.3
[INFO] [stderr]     Checking hamming v0.1.3
[INFO] [stderr]    Compiling generic-array v0.14.3
[INFO] [stderr]    Compiling im v14.3.0
[INFO] [stderr]     Checking tracing-core v0.1.11
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking dtoa-short v0.3.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.13
[INFO] [stderr]     Checking unic-langid-impl v0.9.0
[INFO] [stderr]    Compiling lock_api v0.4.1
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]    Compiling libc v0.2.73
[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/lock_api-0.3.4/src/lib.rs:91:34
[INFO] [stdout]    |
[INFO] [stdout] 91 | #![cfg_attr(feature = "nightly", feature(const_fn))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]     Checking num_cpus v1.13.0
[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]     Checking time v0.1.43
[INFO] [stderr] error: could not compile `lock_api`.
[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" "8692a5f7afbe9d6457a25428bb44c21626faa860cb3c89c44af7a64426f335ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8692a5f7afbe9d6457a25428bb44c21626faa860cb3c89c44af7a64426f335ce", kill_on_drop: false }`
[INFO] [stdout] 8692a5f7afbe9d6457a25428bb44c21626faa860cb3c89c44af7a64426f335ce