[INFO] cloning repository https://github.com/dat2/routing-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dat2/routing-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdat2%2Frouting-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdat2%2Frouting-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cfda93efc91f7c4fe8f443f6f0f36a1f4ea65a97
[INFO] documenting dat2/routing-example 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%2Fdat2%2Frouting-example" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dat2/routing-example 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/dat2/routing-example
[INFO] finished tweaking git repo https://github.com/dat2/routing-example
[INFO] tweaked toml for git repo https://github.com/dat2/routing-example written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/dat2/routing-example 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]     Updating git repository `https://github.com/dat2/routing`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded byteorder v1.1.0
[INFO] [stderr]   Downloaded regex v0.2.2
[INFO] [stderr]   Downloaded custom_derive v0.1.7
[INFO] [stderr]   Downloaded time v0.1.38
[INFO] [stderr]   Downloaded mio v0.6.10
[INFO] [stderr]   Downloaded fuchsia-zircon-sys v0.2.0
[INFO] [stderr]   Downloaded mime v0.3.5
[INFO] [stderr]   Downloaded futures-cpupool v0.1.7
[INFO] [stderr]   Downloaded base64 v0.6.0
[INFO] [stderr]   Downloaded error-chain v0.11.0
[INFO] [stderr]   Downloaded cc v1.0.1
[INFO] [stderr]   Downloaded aho-corasick v0.6.3
[INFO] [stderr]   Downloaded lazycell v0.5.1
[INFO] [stderr]   Downloaded hyper v0.11.6
[INFO] [stderr]   Downloaded num_cpus v1.7.0
[INFO] [stderr]   Downloaded rustc-demangle v0.1.5
[INFO] [stderr]   Downloaded libc v0.2.32
[INFO] [stderr]   Downloaded regex-syntax v0.4.1
[INFO] [stderr]   Downloaded redox_syscall v0.1.31
[INFO] [stderr]   Downloaded fuchsia-zircon v0.2.1
[INFO] [stderr]   Downloaded futures v0.1.16
[INFO] [stderr]   Downloaded magenta v0.1.1
[INFO] [stderr]   Downloaded tokio-core v0.1.10
[INFO] [stderr]   Downloaded thread_local v0.3.4
[INFO] [stderr]   Downloaded tokio-io v0.1.3
[INFO] [stderr]   Downloaded net2 v0.2.31
[INFO] [stderr]   Downloaded conv v0.3.3
[INFO] [stderr]   Downloaded unicase v2.0.0
[INFO] [stderr]   Downloaded lazy_static v0.2.9
[INFO] [stderr]   Downloaded httparse v1.2.3
[INFO] [stderr]   Downloaded percent-encoding v1.0.0
[INFO] [stderr]   Downloaded rand v0.3.17
[INFO] [stderr]   Downloaded magenta-sys v0.1.1
[INFO] [stderr]   Downloaded log v0.3.8
[INFO] [stderr]   Downloaded iovec v0.1.1
[INFO] [stderr]   Downloaded bytes v0.4.5
[INFO] [stderr]   Downloaded backtrace v0.3.3
[INFO] [stderr]   Downloaded safemem v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] b5519b86b4398fd25e6b005867a4f0c5e4ba7c74b86d4a8e55dc227b6da2086c
[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" "b5519b86b4398fd25e6b005867a4f0c5e4ba7c74b86d4a8e55dc227b6da2086c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5519b86b4398fd25e6b005867a4f0c5e4ba7c74b86d4a8e55dc227b6da2086c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5519b86b4398fd25e6b005867a4f0c5e4ba7c74b86d4a8e55dc227b6da2086c", kill_on_drop: false }`
[INFO] [stdout] b5519b86b4398fd25e6b005867a4f0c5e4ba7c74b86d4a8e55dc227b6da2086c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e83220ff6b22a80049b6d3c39f2948e565ca3aa141a73c5acdfe7c955fda8645
[INFO] running `Command { std: "docker" "start" "-a" "e83220ff6b22a80049b6d3c39f2948e565ca3aa141a73c5acdfe7c955fda8645", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.1
[INFO] [stderr]    Compiling libc v0.2.32
[INFO] [stderr]    Compiling rustc-demangle v0.1.5
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.4.1
[INFO] [stderr]     Checking iovec v0.1.1
[INFO] [stderr]     Checking num_cpus v1.7.0
[INFO] [stderr]     Checking rand v0.3.17
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking relay v0.1.0
[INFO] [stderr]    Compiling unicase v2.0.0
[INFO] [stderr]    Compiling thread_local v0.3.4
[INFO] [stderr]     Checking bytes v0.4.5
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking futures-cpupool v0.1.7
[INFO] [stderr]     Checking mio v0.6.10
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]     Checking mime v0.3.5
[INFO] [stderr]     Checking tokio-io v0.1.3
[INFO] [stderr]     Checking tokio-core v0.1.10
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking hyper v0.11.6
[INFO] [stderr]     Checking routing v0.1.1 (https://github.com/dat2/routing#25bfa317)
[INFO] [stderr]    Compiling backtrace v0.3.3
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]    Compiling routing-derive v0.1.1 (https://github.com/dat2/routing#25bfa317)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/routing-a8dd1f4a0aad6c03/25bfa31/routing-derive/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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 `routing-derive`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "e83220ff6b22a80049b6d3c39f2948e565ca3aa141a73c5acdfe7c955fda8645", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e83220ff6b22a80049b6d3c39f2948e565ca3aa141a73c5acdfe7c955fda8645", kill_on_drop: false }`
[INFO] [stdout] e83220ff6b22a80049b6d3c39f2948e565ca3aa141a73c5acdfe7c955fda8645