[INFO] cloning repository https://github.com/rust-cv/kpshow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rust-cv/kpshow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-cv%2Fkpshow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frust-cv%2Fkpshow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 609ce46f11a3e7c6693b9ca055a39803f3129039
[INFO] documenting rust-cv/kpshow 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%2Frust-cv%2Fkpshow" "/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/rust-cv/kpshow 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/rust-cv/kpshow
[INFO] finished tweaking git repo https://github.com/rust-cv/kpshow
[INFO] tweaked toml for git repo https://github.com/rust-cv/kpshow written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/rust-cv/kpshow 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 cv-core v0.10.0
[INFO] [stderr]   Downloaded sample-consensus v0.2.0
[INFO] [stderr]   Downloaded akaze v0.3.1
[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] 52a948cd7047a6719af399b337814b582b29a7935d382ba0f2501163b421b598
[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" "52a948cd7047a6719af399b337814b582b29a7935d382ba0f2501163b421b598", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52a948cd7047a6719af399b337814b582b29a7935d382ba0f2501163b421b598", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52a948cd7047a6719af399b337814b582b29a7935d382ba0f2501163b421b598", kill_on_drop: false }`
[INFO] [stdout] 52a948cd7047a6719af399b337814b582b29a7935d382ba0f2501163b421b598
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 417ce0cc46025df7d28d7d01a7dae5de16759a48a6a559c3d6b84aec45ee40c6
[INFO] running `Command { std: "docker" "start" "-a" "417ce0cc46025df7d28d7d01a7dae5de16759a48a6a559c3d6b84aec45ee40c6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.13
[INFO] [stderr]    Compiling syn v1.0.22
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr]    Compiling ndarray v0.13.1
[INFO] [stderr]     Checking hamming v0.1.3
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking primal-estimate v0.2.1
[INFO] [stderr]     Checking sample-consensus v0.2.0
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]     Checking float-ord v0.2.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]     Checking conv v0.3.3
[INFO] [stderr]     Checking primal-bit v0.2.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking deflate v0.8.4
[INFO] [stderr]     Checking tiff v0.4.0
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking primal-sieve v0.2.9
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking png v0.16.3
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking rusttype v0.8.3
[INFO] [stderr]     Checking primal-check v0.2.3
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking primal 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/packed_simd-0.3.3/src/lib.rs:202:1
[INFO] [stdout]     |
[INFO] [stdout] 202 | / #![feature(
[INFO] [stdout] 203 | |     repr_simd,
[INFO] [stdout] 204 | |     const_fn,
[INFO] [stdout] 205 | |     platform_intrinsics,
[INFO] [stdout] ...   |
[INFO] [stdout] 215 | |     custom_inner_attributes
[INFO] [stdout] 216 | | )]
[INFO] [stdout]     | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rulinalg v0.4.2
[INFO] [stderr]     Checking jpeg-decoder v0.1.19
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking image v0.23.4
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling paste-impl v0.1.12
[INFO] [stderr]    Compiling derive_more v0.99.7
[INFO] [stderr]     Checking nshare v0.1.1
[INFO] [stderr]     Checking imageproc v0.20.0
[INFO] [stderr]     Checking paste v0.1.12
[INFO] [stderr]     Checking simba v0.1.2
[INFO] [stderr]    Compiling structopt-derive v0.4.7
[INFO] [stderr]     Checking nalgebra v0.21.0
[INFO] [stderr]     Checking structopt v0.3.14
[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 `packed_simd`.
[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" "417ce0cc46025df7d28d7d01a7dae5de16759a48a6a559c3d6b84aec45ee40c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "417ce0cc46025df7d28d7d01a7dae5de16759a48a6a559c3d6b84aec45ee40c6", kill_on_drop: false }`
[INFO] [stdout] 417ce0cc46025df7d28d7d01a7dae5de16759a48a6a559c3d6b84aec45ee40c6