[INFO] cloning repository https://github.com/rtsmarty/discord-bots
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rtsmarty/discord-bots" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frtsmarty%2Fdiscord-bots", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frtsmarty%2Fdiscord-bots'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c64e3f8b14ca0e505230fd4b03ee5ec0a09f27d4
[INFO] documenting rtsmarty/discord-bots against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frtsmarty%2Fdiscord-bots" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rtsmarty/discord-bots on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rtsmarty/discord-bots
[INFO] finished tweaking git repo https://github.com/rtsmarty/discord-bots
[INFO] tweaked toml for git repo https://github.com/rtsmarty/discord-bots written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/rtsmarty/discord-bots already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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 tokio v0.2.20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4037b6f046dc82fbc28f66c527ac2d9b1cd95edd25c2add1b3b19ee646f0c1b
[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" "a4037b6f046dc82fbc28f66c527ac2d9b1cd95edd25c2add1b3b19ee646f0c1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4037b6f046dc82fbc28f66c527ac2d9b1cd95edd25c2add1b3b19ee646f0c1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4037b6f046dc82fbc28f66c527ac2d9b1cd95edd25c2add1b3b19ee646f0c1b", kill_on_drop: false }`
[INFO] [stdout] a4037b6f046dc82fbc28f66c527ac2d9b1cd95edd25c2add1b3b19ee646f0c1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 530ecf67bbdd8f37b4f55b473d0bf4d09e1b6db4fc892eabc476fea5e4a0afdd
[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" "530ecf67bbdd8f37b4f55b473d0bf4d09e1b6db4fc892eabc476fea5e4a0afdd", kill_on_drop: false }`
[INFO] [stderr]     Checking serde_json v1.0.52
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.9
[INFO] [stderr]     Checking native-tls v0.2.4
[INFO] [stderr]     Checking tokio v0.2.20
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking pin-project v0.4.9
[INFO] [stderr]     Checking structopt v0.3.14
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking h2 v0.2.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking hyper v0.13.5
[INFO] [stderr]     Checking discord-bots v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting discord-bots v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(hash_set_entry, maybe_uninit_slice_assume_init, try_blocks)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(hash_set_entry, maybe_uninit_slice_assume_init, try_blocks)]
[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 `discord-bots`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name discord_bots 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/libbase64-277e4f705f7fb439.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-bb6ec8f28ecded21.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-c7089d2aa8cbefaa.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-6c51610d42eeabcc.rmeta --extern http=/opt/rustwide/target/debug/deps/libhttp-abab1c5ee482ba75.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-b640427b1b3fe4e7.rmeta --extern native_tls=/opt/rustwide/target/debug/deps/libnative_tls-75e08c4407a8a8b3.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-d60a57357530e242.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-0e6b966ed7773e52.rmeta --extern crypto=/opt/rustwide/target/debug/deps/libcrypto-a3dfadfdf2368269.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-04de4cf55d4bde88.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-5c7bd19fbfb63c02.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-6c52749395cc3904.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-bd9d864c957866dd.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-6044df48d24b62e9.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-542ca21192d61b4e.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-2614d882b403807f.rmeta --extern tokio_tls=/opt/rustwide/target/debug/deps/libtokio_tls-f615f6ee5942c4e0.rmeta --extern unicase=/opt/rustwide/target/debug/deps/libunicase-30c10800f0e2cfd6.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "530ecf67bbdd8f37b4f55b473d0bf4d09e1b6db4fc892eabc476fea5e4a0afdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "530ecf67bbdd8f37b4f55b473d0bf4d09e1b6db4fc892eabc476fea5e4a0afdd", kill_on_drop: false }`
[INFO] [stdout] 530ecf67bbdd8f37b4f55b473d0bf4d09e1b6db4fc892eabc476fea5e4a0afdd
