[INFO] cloning repository https://github.com/stickeritis/sticker2-python
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stickeritis/sticker2-python" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstickeritis%2Fsticker2-python", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstickeritis%2Fsticker2-python'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9bc133dbaddc9db6f31957a57837a8885dcd55ec
[INFO] documenting stickeritis/sticker2-python 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%2Fstickeritis%2Fsticker2-python" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stickeritis/sticker2-python 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/stickeritis/sticker2-python
[INFO] finished tweaking git repo https://github.com/stickeritis/sticker2-python
[INFO] tweaked toml for git repo https://github.com/stickeritis/sticker2-python written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/stickeritis/sticker2-python 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded inventory v0.1.6
[INFO] [stderr]   Downloaded libc v0.2.69
[INFO] [stderr]   Downloaded anyhow v1.0.31
[INFO] [stderr]   Downloaded caseless v0.2.1
[INFO] [stderr]   Downloaded linked-hash-map v0.5.3
[INFO] [stderr]   Downloaded lock_api v0.3.4
[INFO] [stderr]   Downloaded protobuf v2.10.1
[INFO] [stderr]   Downloaded cmake v0.1.44
[INFO] [stderr]   Downloaded proc-macro2 v1.0.10
[INFO] [stderr]   Downloaded parking_lot_core v0.7.2
[INFO] [stderr]   Downloaded unindent v0.1.5
[INFO] [stderr]   Downloaded seqalign v0.2.2
[INFO] [stderr]   Downloaded indoc-impl v0.3.5
[INFO] [stderr]   Downloaded yaml-rust v0.4.3
[INFO] [stderr]   Downloaded serde v1.0.106
[INFO] [stderr]   Downloaded backtrace v0.3.48
[INFO] [stderr]   Downloaded bzip2 v0.3.3
[INFO] [stderr]   Downloaded libz-sys v1.0.25
[INFO] [stderr]   Downloaded torch-sys v0.1.7
[INFO] [stderr]   Downloaded tch v0.1.7
[INFO] [stderr]   Downloaded flate2 v1.0.14
[INFO] [stderr]   Downloaded parking_lot v0.10.2
[INFO] [stderr]   Downloaded toml v0.5.6
[INFO] [stderr]   Downloaded failure_derive v0.1.8
[INFO] [stderr]   Downloaded failure v0.1.8
[INFO] [stderr]   Downloaded maplit v1.0.2
[INFO] [stderr]   Downloaded serde_derive v1.0.106
[INFO] [stderr]   Downloaded wordpieces v0.4.0
[INFO] [stderr]   Downloaded ryu v1.0.4
[INFO] [stderr]   Downloaded regex v1.3.7
[INFO] [stderr]   Downloaded fixedbitset v0.2.0
[INFO] [stderr]   Downloaded sentencepiece-sys v0.2.1
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.15
[INFO] [stderr]   Downloaded ordered-float v1.0.2
[INFO] [stderr]   Downloaded sticker2 v0.3.0
[INFO] [stderr]   Downloaded itertools v0.9.0
[INFO] [stderr]   Downloaded bzip2-sys v0.1.8+1.0.8
[INFO] [stderr]   Downloaded aho-corasick v0.7.10
[INFO] [stderr]   Downloaded indoc v0.3.5
[INFO] [stderr]   Downloaded rand_xorshift v0.2.0
[INFO] [stderr]   Downloaded vcpkg v0.2.8
[INFO] [stderr]   Downloaded petgraph v0.5.0
[INFO] [stderr]   Downloaded openssl-sys v0.9.56
[INFO] [stderr]   Downloaded serde_json v1.0.52
[INFO] [stderr]   Downloaded regex-syntax v0.6.17
[INFO] [stderr]   Downloaded pyo3cls v0.9.2
[INFO] [stderr]   Downloaded serde_yaml v0.8.12
[INFO] [stderr]   Downloaded paste-impl v0.1.11
[INFO] [stderr]   Downloaded gimli v0.21.0
[INFO] [stderr]   Downloaded object v0.19.0
[INFO] [stderr]   Downloaded num-derive v0.3.0
[INFO] [stderr]   Downloaded paste v0.1.11
[INFO] [stderr]   Downloaded thiserror-impl v1.0.16
[INFO] [stderr]   Downloaded sentencepiece v0.2.1
[INFO] [stderr]   Downloaded syn v1.0.18
[INFO] [stderr]   Downloaded curl v0.4.29
[INFO] [stderr]   Downloaded thiserror v1.0.16
[INFO] [stderr]   Downloaded ghost v0.1.1
[INFO] [stderr]   Downloaded pyo3-derive-backend v0.9.2
[INFO] [stderr]   Downloaded pyo3 v0.9.2
[INFO] [stderr]   Downloaded sticker-encoders v0.5.1
[INFO] [stderr]   Downloaded ctor v0.1.14
[INFO] [stderr]   Downloaded addr2line v0.12.1
[INFO] [stderr]   Downloaded inventory-impl v0.1.6
[INFO] [stderr]   Downloaded curl-sys v0.4.31+curl-7.70.0
[INFO] [stderr]   Downloaded zip v0.5.5
[INFO] [stderr]   Downloaded edit_tree v0.1.2
[INFO] [stderr]   Downloaded fst v0.4.3
[INFO] [stderr]   Downloaded numberer v0.2.0
[INFO] [stderr]   Downloaded ohnomore v0.2.2
[INFO] [stderr]   Downloaded sticker-transformers v0.7.0
[INFO] [stderr]   Downloaded conllu v0.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 3b0388137c7baef405d46471cfefaf1170d348eec52ddb513bd5e6aa7d0890b9
[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" "3b0388137c7baef405d46471cfefaf1170d348eec52ddb513bd5e6aa7d0890b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b0388137c7baef405d46471cfefaf1170d348eec52ddb513bd5e6aa7d0890b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b0388137c7baef405d46471cfefaf1170d348eec52ddb513bd5e6aa7d0890b9", kill_on_drop: false }`
[INFO] [stdout] 3b0388137c7baef405d46471cfefaf1170d348eec52ddb513bd5e6aa7d0890b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] a980771651be6fc65d1402a51621414f25fbf0ce49ee9f534bd996dfa466ddee
[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" "a980771651be6fc65d1402a51621414f25fbf0ce49ee9f534bd996dfa466ddee", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling gimli v0.21.0
[INFO] [stderr]    Compiling object v0.19.0
[INFO] [stderr]    Compiling curl v0.4.29
[INFO] [stderr]    Compiling openssl-probe v0.1.2
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling fst v0.4.3
[INFO] [stderr]    Compiling ndarray v0.13.1
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling protobuf v2.10.1
[INFO] [stderr]     Checking seqalign v0.2.2
[INFO] [stderr]    Compiling unindent v0.1.5
[INFO] [stderr]    Compiling sentencepiece v0.2.1
[INFO] [stderr]    Compiling inventory v0.1.6
[INFO] [stderr]    Compiling bzip2-sys v0.1.8+1.0.8
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling openssl-sys v0.9.56
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling curl-sys v0.4.31+curl-7.70.0
[INFO] [stderr]    Compiling sentencepiece-sys v0.2.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking matrixmultiply v0.2.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lock_api-0.3.4/src/lib.rs:91:34
[INFO] [stdout]    |
[INFO] [stdout] 91 | #![cfg_attr(feature = "nightly", feature(const_fn))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling libc v0.2.69
[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 `lock_api`.
[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" "a980771651be6fc65d1402a51621414f25fbf0ce49ee9f534bd996dfa466ddee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a980771651be6fc65d1402a51621414f25fbf0ce49ee9f534bd996dfa466ddee", kill_on_drop: false }`
[INFO] [stdout] a980771651be6fc65d1402a51621414f25fbf0ce49ee9f534bd996dfa466ddee