[INFO] cloning repository https://github.com/zzeroo/xmz-snapshot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zzeroo/xmz-snapshot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzzeroo%2Fxmz-snapshot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzzeroo%2Fxmz-snapshot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6649b6af55ea40440eefb7a33ac8b93bf73ef731
[INFO] documenting zzeroo/xmz-snapshot against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzzeroo%2Fxmz-snapshot" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zzeroo/xmz-snapshot on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zzeroo/xmz-snapshot
[INFO] finished tweaking git repo https://github.com/zzeroo/xmz-snapshot
[INFO] tweaked toml for git repo https://github.com/zzeroo/xmz-snapshot written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/zzeroo/xmz-snapshot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded atty v0.2.8
[INFO] [stderr]   Downloaded redox_syscall v0.1.37
[INFO] [stderr]   Downloaded bitflags v1.0.1
[INFO] [stderr]   Downloaded libc v0.2.39
[INFO] [stderr]   Downloaded clap v2.31.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fd40b203362cfaa75ee7bb6139592386c0cb780a7e934a8b3b48c4b6d3adb55
[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" "8fd40b203362cfaa75ee7bb6139592386c0cb780a7e934a8b3b48c4b6d3adb55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fd40b203362cfaa75ee7bb6139592386c0cb780a7e934a8b3b48c4b6d3adb55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fd40b203362cfaa75ee7bb6139592386c0cb780a7e934a8b3b48c4b6d3adb55", kill_on_drop: false }`
[INFO] [stdout] 8fd40b203362cfaa75ee7bb6139592386c0cb780a7e934a8b3b48c4b6d3adb55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f2152fdb6a9847a4a55cbda7c50b5c148c320c16527228ec935544120bb0f31
[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" "9f2152fdb6a9847a4a55cbda7c50b5c148c320c16527228ec935544120bb0f31", kill_on_drop: false }`
[INFO] [stderr]     Checking atty v0.2.8
[INFO] [stderr]     Checking clap v2.31.1
[INFO] [stderr]  Documenting xmz-snapshot v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 document `xmz-snapshot`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name xmz_snapshot src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-c06bf41d28b8339f.rmeta --cap-lints=warn --crate-version 0.3.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "9f2152fdb6a9847a4a55cbda7c50b5c148c320c16527228ec935544120bb0f31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f2152fdb6a9847a4a55cbda7c50b5c148c320c16527228ec935544120bb0f31", kill_on_drop: false }`
[INFO] [stdout] 9f2152fdb6a9847a4a55cbda7c50b5c148c320c16527228ec935544120bb0f31