[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] 3f39434e249c7124e9a381692d4b5da7d660e5d9
[INFO] checking luyikk/kcpservice against beta for pr-78714
[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 beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 337edaca875d30cc6a77754b9d15277856b53b33884af4bbd8a00f411b27f9ee
[INFO] running `Command { std: "docker" "start" "-a" "337edaca875d30cc6a77754b9d15277856b53b33884af4bbd8a00f411b27f9ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "337edaca875d30cc6a77754b9d15277856b53b33884af4bbd8a00f411b27f9ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "337edaca875d30cc6a77754b9d15277856b53b33884af4bbd8a00f411b27f9ee", kill_on_drop: false }`
[INFO] [stdout] 337edaca875d30cc6a77754b9d15277856b53b33884af4bbd8a00f411b27f9ee
[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" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--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] 704c58df17933fca6229725029fdb21cde52b0c6872c2e7248f9cae742f5c921
[INFO] running `Command { std: "docker" "start" "-a" "704c58df17933fca6229725029fdb21cde52b0c6872c2e7248f9cae742f5c921", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling cc v1.0.60
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling proc-macro-hack v0.5.18
[INFO] [stderr]     Checking arc-swap v0.4.7
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]     Checking xbinary v0.1.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.35
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]    Compiling libmimalloc-sys v0.1.16
[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]     Checking kcpgateway v0.1.0 (/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(async_closure)]
[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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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 `kcpgateway`
[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] [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" "704c58df17933fca6229725029fdb21cde52b0c6872c2e7248f9cae742f5c921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "704c58df17933fca6229725029fdb21cde52b0c6872c2e7248f9cae742f5c921", kill_on_drop: false }`
[INFO] [stdout] 704c58df17933fca6229725029fdb21cde52b0c6872c2e7248f9cae742f5c921