[INFO] cloning repository https://github.com/mailgun/sneakercopy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mailgun/sneakercopy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmailgun%2Fsneakercopy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmailgun%2Fsneakercopy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3b2c2bf4c388b88c5dcc871b09ee3d06f9a0c6fe
[INFO] documenting mailgun/sneakercopy 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%2Fmailgun%2Fsneakercopy" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mailgun/sneakercopy 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/mailgun/sneakercopy
[INFO] finished tweaking git repo https://github.com/mailgun/sneakercopy
[INFO] tweaked toml for git repo https://github.com/mailgun/sneakercopy written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/mailgun/sneakercopy 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 libsodium-sys v0.1.0
[INFO] [stderr]   Downloaded quicli v0.3.0
[INFO] [stderr]   Downloaded sodiumoxide v0.1.0
[INFO] [stderr]   Downloaded env_logger v0.5.11
[INFO] [stderr]   Downloaded spinners v1.0.0
[INFO] [stderr]   Downloaded clap-verbosity-flag v0.1.0
[INFO] [stderr]   Downloaded tar v0.4.16
[INFO] [stderr]   Downloaded spinner v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 9611efbb81e0695a40609603cffcee6d22ccd9c9c6d0e8af7ad72cccc51cd89e
[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" "9611efbb81e0695a40609603cffcee6d22ccd9c9c6d0e8af7ad72cccc51cd89e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9611efbb81e0695a40609603cffcee6d22ccd9c9c6d0e8af7ad72cccc51cd89e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9611efbb81e0695a40609603cffcee6d22ccd9c9c6d0e8af7ad72cccc51cd89e", kill_on_drop: false }`
[INFO] [stdout] 9611efbb81e0695a40609603cffcee6d22ccd9c9c6d0e8af7ad72cccc51cd89e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 810fc5e7fcca3135071ae6114d7b9ac9145da473ecd8b5bf4253069636ba366b
[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" "810fc5e7fcca3135071ae6114d7b9ac9145da473ecd8b5bf4253069636ba366b", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.18
[INFO] [stderr]    Compiling libc v0.2.42
[INFO] [stderr]    Compiling regex v1.0.2
[INFO] [stderr]     Checking lazy_static v1.0.2
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling cfg-if v0.1.4
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling bindgen v0.37.4
[INFO] [stderr]    Compiling termcolor v1.0.1
[INFO] [stderr]    Compiling bitflags v1.0.3
[INFO] [stderr]    Compiling serde v1.0.70
[INFO] [stderr]    Compiling pkg-config v0.3.12
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]    Compiling clang-sys v0.23.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr]    Compiling proc-macro2 v0.3.5
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking log v0.4.3
[INFO] [stderr]     Checking filetime v0.2.1
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking rpassword v2.0.0
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]    Compiling humantime v1.1.1
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]     Checking base64 v0.9.2
[INFO] [stderr]     Checking aho-corasick v0.6.6
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking tar v0.4.16
[INFO] [stderr]    Compiling strum_macros v0.8.0
[INFO] [stderr]    Compiling quote v0.6.4
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling which v1.0.5
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling syn v0.14.5
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]     Checking term v0.2.14
[INFO] [stderr]     Checking libflate v0.1.16
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking spinner v0.4.0
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.23
[INFO] [stderr]    Compiling cexpr v0.2.3
[INFO] [stderr]     Checking rayon v1.0.2
[INFO] [stderr]     Checking spinners v1.0.0
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking error-chain v0.12.0
[INFO] [stderr]    Compiling env_logger v0.5.11
[INFO] [stderr]    Compiling structopt-derive v0.2.10
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]     Checking structopt v0.2.10
[INFO] [stderr]     Checking clap-verbosity-flag v0.1.0
[INFO] [stderr]     Checking quicli v0.3.0
[INFO] [stderr]    Compiling libsodium-sys v0.1.0
[INFO] [stderr]     Checking sodiumoxide v0.1.0
[INFO] [stderr]  Documenting sneakercopy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(int_to_from_bytes)]
[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 `sneakercopy`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name sneakercopy src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern base64=/opt/rustwide/target/debug/deps/libbase64-7b50b13c0512c446.rmeta --extern error_chain=/opt/rustwide/target/debug/deps/liberror_chain-30274c129af1a1ae.rmeta --extern libflate=/opt/rustwide/target/debug/deps/liblibflate-b04ee2ec858a817e.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-bf79bbb470cc207d.rmeta --extern quicli=/opt/rustwide/target/debug/deps/libquicli-3e746dab9d718e80.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-64009f741b4c02ae.rmeta --extern rpassword=/opt/rustwide/target/debug/deps/librpassword-9ce109b48cd975ef.rmeta --extern sodiumoxide=/opt/rustwide/target/debug/deps/libsodiumoxide-9ec24d3f0289e008.rmeta --extern spinners=/opt/rustwide/target/debug/deps/libspinners-c322055c888399f1.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-4a7d9d097c70a44c.rmeta --extern tar=/opt/rustwide/target/debug/deps/libtar-82ca273ce1d47986.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "810fc5e7fcca3135071ae6114d7b9ac9145da473ecd8b5bf4253069636ba366b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "810fc5e7fcca3135071ae6114d7b9ac9145da473ecd8b5bf4253069636ba366b", kill_on_drop: false }`
[INFO] [stdout] 810fc5e7fcca3135071ae6114d7b9ac9145da473ecd8b5bf4253069636ba366b