[INFO] cloning repository https://github.com/SchrodingerZhu/new_chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SchrodingerZhu/new_chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSchrodingerZhu%2Fnew_chat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSchrodingerZhu%2Fnew_chat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3df0dd4b00d1f10259d72ee6f45ead2a3c1f66d3
[INFO] documenting SchrodingerZhu/new_chat against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSchrodingerZhu%2Fnew_chat" "/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/SchrodingerZhu/new_chat on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SchrodingerZhu/new_chat
[INFO] finished tweaking git repo https://github.com/SchrodingerZhu/new_chat
[INFO] tweaked toml for git repo https://github.com/SchrodingerZhu/new_chat written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/SchrodingerZhu/new_chat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", 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] 63d006f2952c364b7478849f5d4d2601e7bf8eda26d1eab8110670c8ddefbd28
[INFO] running `Command { std: "docker" "start" "-a" "63d006f2952c364b7478849f5d4d2601e7bf8eda26d1eab8110670c8ddefbd28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63d006f2952c364b7478849f5d4d2601e7bf8eda26d1eab8110670c8ddefbd28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63d006f2952c364b7478849f5d4d2601e7bf8eda26d1eab8110670c8ddefbd28", kill_on_drop: false }`
[INFO] [stdout] 63d006f2952c364b7478849f5d4d2601e7bf8eda26d1eab8110670c8ddefbd28
[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" "+1.46.0" "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] cadeb0ae615f47c4a5d9b34cd026a6b6a8d224f024059b620a437233a9fb7b6a
[INFO] running `Command { std: "docker" "start" "-a" "cadeb0ae615f47c4a5d9b34cd026a6b6a8d224f024059b620a437233a9fb7b6a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling rle-decode-fast v1.0.1
[INFO] [stderr]    Compiling fs_extra v1.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]    Compiling hashbrown v0.6.3
[INFO] [stderr]    Compiling bincode v1.2.0
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking tracing-core v0.1.7
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking num_cpus v1.11.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking page_size v0.4.1
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]     Checking float-cmp v0.5.3
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling jemalloc-sys v0.3.2
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]    Compiling libflate v0.1.27
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking tokio-executor v0.1.8
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]    Compiling c2-chacha v0.2.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling filetime v0.2.7
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking chrono v0.4.9
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking tokio-timer v0.2.11
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking http v0.1.19
[INFO] [stderr]     Checking string v0.2.1
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling tar v0.4.26
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling rand v0.7.2
[INFO] [stderr]     Checking tokio-sync v0.2.0-alpha.6
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]    Compiling libsodium-sys v0.2.5
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking webpki v0.19.1
[INFO] [stderr]     Checking sct v0.5.0
[INFO] [stderr]     Checking rustls v0.15.2
[INFO] [stderr]    Compiling gotham_derive v0.4.0
[INFO] [stderr]    Compiling synstructure v0.12.1
[INFO] [stderr]     Checking tokio-rustls v0.9.4
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling pin-project-internal v0.4.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling tokio-macros v0.2.0-alpha.6
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking tracing v0.1.10
[INFO] [stderr]    Compiling const-random-macro v0.1.6
[INFO] [stderr]     Checking const-random v0.1.6
[INFO] [stderr]     Checking ahash v0.2.17
[INFO] [stderr]     Checking pin-project v0.4.5
[INFO] [stderr]     Checking tokio-io v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-codec v0.2.0-alpha.6
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling memoffset v0.5.2
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking rayon-core v1.6.0
[INFO] [stderr]     Checking tokio-threadpool v0.1.16
[INFO] [stderr]     Checking tokio-executor v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-reactor v0.1.10
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-udp v0.1.5
[INFO] [stderr]     Checking rayon v1.2.0
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-fs v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-timer v0.3.0-alpha.6
[INFO] [stderr]     Checking tokio-net v0.2.0-alpha.6
[INFO] [stderr]    Compiling borrow-bag v1.0.0
[INFO] [stderr]     Checking tokio v0.2.0-alpha.6
[INFO] [stderr]     Checking halfbrown v0.1.10
[INFO] [stderr]     Checking gotham v0.4.0
[INFO] [stderr]     Checking simd-json v0.1.26
[INFO] [stderr]     Checking sodiumoxide v0.2.5
[INFO] [stderr]     Checking jemallocator v0.3.2
[INFO] [stderr]  Documenting new_chat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene, decl_macro, async_closure)]
[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 `new_chat`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name new_chat 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 base64=/opt/rustwide/target/debug/deps/libbase64-d973ad0bb6bed0e7.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-21a9e9797bbfc6c4.rmeta --extern cookie=/opt/rustwide/target/debug/deps/libcookie-c24d97a1f21a5a15.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-29a973654112bb9d.rmeta --extern gotham=/opt/rustwide/target/debug/deps/libgotham-85a99b146db0db25.rmeta --extern gotham_derive=/opt/rustwide/target/debug/deps/libgotham_derive-a5f2a9b3a1cd0c83.so --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-c32b79916d3d38a8.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-238b72ee65fa0ea7.rmeta --extern jemallocator=/opt/rustwide/target/debug/deps/libjemallocator-899e409004f5d5ba.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-fbf04c91fde2fd1c.rmeta --extern mime=/opt/rustwide/target/debug/deps/libmime-e444602e2e4fdfa5.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-2607cadc87ebef31.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-59b8012837c52626.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-ba48c2091bc87cdd.rmeta --extern simd_json=/opt/rustwide/target/debug/deps/libsimd_json-11c8e6e572dc82d3.rmeta --extern sodiumoxide=/opt/rustwide/target/debug/deps/libsodiumoxide-cf8bcc53675f856c.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-efde1ac5038c4b92.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "cadeb0ae615f47c4a5d9b34cd026a6b6a8d224f024059b620a437233a9fb7b6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cadeb0ae615f47c4a5d9b34cd026a6b6a8d224f024059b620a437233a9fb7b6a", kill_on_drop: false }`
[INFO] [stdout] cadeb0ae615f47c4a5d9b34cd026a6b6a8d224f024059b620a437233a9fb7b6a