[INFO] cloning repository https://github.com/noboruma/rclip
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/noboruma/rclip" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoboruma%2Frclip", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoboruma%2Frclip'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9a4f3e0bcc22e98e9a55dfd5d5bc4e37acb59960
[INFO] documenting noboruma/rclip against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoboruma%2Frclip" "/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/noboruma/rclip 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 git repo https://github.com/noboruma/rclip
[INFO] finished tweaking git repo https://github.com/noboruma/rclip
[INFO] tweaked toml for git repo https://github.com/noboruma/rclip written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/noboruma/rclip 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-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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] db9fa469207e6b6432852992e2a405091675746d1cba5bab520632228e752968
[INFO] running `Command { std: "docker" "start" "-a" "db9fa469207e6b6432852992e2a405091675746d1cba5bab520632228e752968", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db9fa469207e6b6432852992e2a405091675746d1cba5bab520632228e752968", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db9fa469207e6b6432852992e2a405091675746d1cba5bab520632228e752968", kill_on_drop: false }`
[INFO] [stdout] db9fa469207e6b6432852992e2a405091675746d1cba5bab520632228e752968
[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" "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] [stdout] 356f2bfce7f5e27c1a693bb99042e63a86b59dbc904ff501d6cc61262bf0eb3f
[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" "356f2bfce7f5e27c1a693bb99042e63a86b59dbc904ff501d6cc61262bf0eb3f", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.7.0
[INFO] [stderr]    Compiling serde_json v1.0.63
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling mocktopus_macros v0.7.10
[INFO] [stderr]     Checking futures-util v0.3.13
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking tokio v1.2.0
[INFO] [stderr]     Checking predicates-tree v1.0.2
[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/mocktopus_macros-0.7.10/src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking predicates v1.0.7
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking dirs v2.0.2
[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 `mocktopus_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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "356f2bfce7f5e27c1a693bb99042e63a86b59dbc904ff501d6cc61262bf0eb3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "356f2bfce7f5e27c1a693bb99042e63a86b59dbc904ff501d6cc61262bf0eb3f", kill_on_drop: false }`
[INFO] [stdout] 356f2bfce7f5e27c1a693bb99042e63a86b59dbc904ff501d6cc61262bf0eb3f
