[INFO] fetching crate onemfive 0.0.15...
[INFO] documenting onemfive-0.0.15 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate onemfive 0.0.15 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate onemfive 0.0.15 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate onemfive 0.0.15
[INFO] finished tweaking crates.io crate onemfive 0.0.15
[INFO] tweaked toml for crates.io crate onemfive 0.0.15 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate onemfive 0.0.15 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd227822f59ff231e933dbeac54ffc1c83ee8dcb38cca11d9797fcdf0d3f3c67
[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" "dd227822f59ff231e933dbeac54ffc1c83ee8dcb38cca11d9797fcdf0d3f3c67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd227822f59ff231e933dbeac54ffc1c83ee8dcb38cca11d9797fcdf0d3f3c67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd227822f59ff231e933dbeac54ffc1c83ee8dcb38cca11d9797fcdf0d3f3c67", kill_on_drop: false }`
[INFO] [stdout] dd227822f59ff231e933dbeac54ffc1c83ee8dcb38cca11d9797fcdf0d3f3c67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] 4191331108ae0f8301272d6f5be337f58326bc4542faab561733b5279b96406d
[INFO] running `Command { std: "docker" "start" "-a" "4191331108ae0f8301272d6f5be337f58326bc4542faab561733b5279b96406d", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]    Compiling yansi v0.4.0
[INFO] [stderr]    Compiling untrusted v0.6.2
[INFO] [stderr]     Checking nom v2.2.1
[INFO] [stderr]    Compiling ring v0.13.5
[INFO] [stderr]    Compiling rocket_codegen v0.4.4
[INFO] [stderr]    Compiling rocket v0.4.4
[INFO] [stderr]    Compiling idna v0.1.5
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling num_cpus v1.12.0
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling proc-macro-hack v0.5.12
[INFO] [stderr]    Compiling devise_core v0.2.0
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking futures-channel v0.3.4
[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/devise_core-0.2.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_diagnostic, proc_macro_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling failure_derive v0.1.7
[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/devise_core-0.2.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(crate_visibility_modifier)]
[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/devise_core-0.2.0/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(concat_idents)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_core v0.5.1
[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 compile `devise_core`
[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" "4191331108ae0f8301272d6f5be337f58326bc4542faab561733b5279b96406d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4191331108ae0f8301272d6f5be337f58326bc4542faab561733b5279b96406d", kill_on_drop: false }`
[INFO] [stdout] 4191331108ae0f8301272d6f5be337f58326bc4542faab561733b5279b96406d
