[INFO] cloning repository https://github.com/johnsnewby/mjpeg
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johnsnewby/mjpeg" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnsnewby%2Fmjpeg", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnsnewby%2Fmjpeg'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ff5d31f8d70d01083ff8b1240b91a5daf2e03da
[INFO] documenting johnsnewby/mjpeg 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%2Fjohnsnewby%2Fmjpeg" "/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/johnsnewby/mjpeg 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/johnsnewby/mjpeg
[INFO] finished tweaking git repo https://github.com/johnsnewby/mjpeg
[INFO] tweaked toml for git repo https://github.com/johnsnewby/mjpeg written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/johnsnewby/mjpeg 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]  Downloading crates ...
[INFO] [stderr]   Downloaded finally-block v0.2.0
[INFO] [stderr]   Downloaded iter-read v0.2.1
[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] 378a7f79b5c6c04d344b5457b9ec9e7bd6427ace1c310097fba142a9746a3977
[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" "378a7f79b5c6c04d344b5457b9ec9e7bd6427ace1c310097fba142a9746a3977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "378a7f79b5c6c04d344b5457b9ec9e7bd6427ace1c310097fba142a9746a3977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "378a7f79b5c6c04d344b5457b9ec9e7bd6427ace1c310097fba142a9746a3977", kill_on_drop: false }`
[INFO] [stdout] 378a7f79b5c6c04d344b5457b9ec9e7bd6427ace1c310097fba142a9746a3977
[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] 761047470d25f9c1013108a9e3b18e27b7efe31900e746fc912c0a97a97e2d90
[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" "761047470d25f9c1013108a9e3b18e27b7efe31900e746fc912c0a97a97e2d90", 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]     Checking arc-swap v0.4.5
[INFO] [stderr]    Compiling zmq v0.9.2
[INFO] [stderr]     Checking ascii v0.8.7
[INFO] [stderr]     Checking bytemuck v1.2.0
[INFO] [stderr]     Checking chunked_transfer v0.3.1
[INFO] [stderr]     Checking iter-read v0.2.1
[INFO] [stderr]     Checking simple-error v0.2.1
[INFO] [stderr]     Checking finally-block v0.2.0
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking deflate v0.8.3
[INFO] [stderr]     Checking tiff v0.4.0
[INFO] [stderr]    Compiling metadeps v1.1.2
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking png v0.16.1
[INFO] [stderr]    Compiling zmq-sys v0.11.0
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking tiny_http v0.6.2
[INFO] [stderr]     Checking jpeg-decoder v0.1.18
[INFO] [stderr]     Checking image v0.23.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.12
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]     Checking pin-project v0.4.8
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking h2 v0.2.2
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking hyper v0.13.4
[INFO] [stderr]  Documenting mjpeg-proxy v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(decl_macro)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(backtrace)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `mjpeg-proxy`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name mjpeg_proxy 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-2d00af1704e04391.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-60b3f12b9e133225.rmeta --extern finally_block=/opt/rustwide/target/debug/deps/libfinally_block-2c124c7859246ff0.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-1e3d17569f009c67.rmeta --extern futures_util=/opt/rustwide/target/debug/deps/libfutures_util-754ecce9076e2556.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-f35c7b952db68a49.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-14d47f163b6fbe84.rmeta --extern iter_read=/opt/rustwide/target/debug/deps/libiter_read-447ffa3fac004ccf.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-db88f49d9e5662e7.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-69d9a7f018cb28c7.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-9e0dcf9b8c18f58a.rmeta --extern simple_error=/opt/rustwide/target/debug/deps/libsimple_error-30b53a0f6c925771.rmeta --extern tiny_http=/opt/rustwide/target/debug/deps/libtiny_http-c86f1053eb9a5c46.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-220ace2301fea85b.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-cd1fe7a029b974db.rmeta --extern zmq=/opt/rustwide/target/debug/deps/libzmq-0d4e1856121a88a8.rmeta --cap-lints=warn --crate-version 0.2.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "761047470d25f9c1013108a9e3b18e27b7efe31900e746fc912c0a97a97e2d90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "761047470d25f9c1013108a9e3b18e27b7efe31900e746fc912c0a97a97e2d90", kill_on_drop: false }`
[INFO] [stdout] 761047470d25f9c1013108a9e3b18e27b7efe31900e746fc912c0a97a97e2d90