[INFO] cloning repository https://github.com/luyikk/kcpservice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/luyikk/kcpservice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluyikk%2Fkcpservice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fluyikk%2Fkcpservice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0b37236f29297a78455e91b2d04b974453ef7fa2
[INFO] documenting luyikk/kcpservice 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%2Fluyikk%2Fkcpservice" "/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/luyikk/kcpservice 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/luyikk/kcpservice
[INFO] finished tweaking git repo https://github.com/luyikk/kcpservice
[INFO] tweaked toml for git repo https://github.com/luyikk/kcpservice written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/luyikk/kcpservice 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] 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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75f607d1911f4c4c53c74798dfdb03ee78d1bbde509919ce7a661f43197d3d4b
[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" "75f607d1911f4c4c53c74798dfdb03ee78d1bbde509919ce7a661f43197d3d4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75f607d1911f4c4c53c74798dfdb03ee78d1bbde509919ce7a661f43197d3d4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75f607d1911f4c4c53c74798dfdb03ee78d1bbde509919ce7a661f43197d3d4b", kill_on_drop: false }`
[INFO] [stdout] 75f607d1911f4c4c53c74798dfdb03ee78d1bbde509919ce7a661f43197d3d4b
[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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e9f726f3e01406f494ffe4811a084cd085cdc30cfaf55058558e65f7334ce256
[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" "e9f726f3e01406f494ffe4811a084cd085cdc30cfaf55058558e65f7334ce256", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]    Compiling libmimalloc-sys v0.1.16
[INFO] [stderr]     Checking xbinary v0.1.3
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking const-random v0.1.8
[INFO] [stderr]     Checking ahash v0.4.5
[INFO] [stderr]     Checking mimalloc v0.1.20
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling async-trait v0.1.40
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking flexi_logger v0.16.1
[INFO] [stderr]  Documenting kcpgateway 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(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 `kcpgateway`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name kcpgateway 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 ahash=/opt/rustwide/target/debug/deps/libahash-bd6e2011f57f0567.rmeta --extern async_mutex=/opt/rustwide/target/debug/deps/libasync_mutex-d24249e58d87024c.rmeta --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-21700817a4b15ad5.so --extern bytes=/opt/rustwide/target/debug/deps/libbytes-060d9d2e342fea55.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-81f7e03051c3f333.rmeta --extern flexi_logger=/opt/rustwide/target/debug/deps/libflexi_logger-1ceaed129aef7004.rmeta --extern json=/opt/rustwide/target/debug/deps/libjson-ae9d7700866fab35.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-72923b2d9aa06af7.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-48fbfd5d624c4cb9.rmeta --extern mimalloc=/opt/rustwide/target/debug/deps/libmimalloc-53bee74308e958f7.rmeta --extern net2=/opt/rustwide/target/debug/deps/libnet2-f97ded8604366899.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-772b5ed83b639cfb.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-a175c9a51083d85d.rmeta --extern xbinary=/opt/rustwide/target/debug/deps/libxbinary-26175117dc011e4b.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "e9f726f3e01406f494ffe4811a084cd085cdc30cfaf55058558e65f7334ce256", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9f726f3e01406f494ffe4811a084cd085cdc30cfaf55058558e65f7334ce256", kill_on_drop: false }`
[INFO] [stdout] e9f726f3e01406f494ffe4811a084cd085cdc30cfaf55058558e65f7334ce256
