[INFO] cloning repository https://github.com/werner/focusvent_front
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/werner/focusvent_front" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwerner%2Ffocusvent_front"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwerner%2Ffocusvent_front'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0f4612066b8216113d794aaed494eb04e01ad59d
[INFO] checking werner/focusvent_front against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwerner%2Ffocusvent_front" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/werner/focusvent_front on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/werner/focusvent_front
[INFO] finished tweaking git repo https://github.com/werner/focusvent_front
[INFO] tweaked toml for git repo https://github.com/werner/focusvent_front written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/werner/focusvent_front already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f0206b0260a1aaed245379cab637ad95d46316241666bb386de599f69eb3e018
[INFO] running `"docker" "start" "-a" "f0206b0260a1aaed245379cab637ad95d46316241666bb386de599f69eb3e018"`
[INFO] [stderr]    Compiling stdweb v0.4.8
[INFO] [stderr]    Compiling stdweb-derive v0.4.0
[INFO] [stderr]     Checking yew v0.5.0 (https://github.com/DenisKolodin/yew?rev=a5213c57430b2f18539aeb25939bdc8c5c348157#a5213c57)
[INFO] [stderr]     Checking web_logger v0.1.0
[INFO] [stderr]     Checking yew_patterns v0.1.0 (https://github.com/hgzimmerman/yew_patterns?rev=63caa9553863382e136ac7b9638c9768422cdd52#63caa955)
[INFO] [stderr]     Checking yew_router v0.1.0 (https://github.com/hgzimmerman/YewRouter#1f3a26f3)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/git/checkouts/yewrouter-c6d9def9135695f5/1f3a26f/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(never_type)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `yew_router`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f0206b0260a1aaed245379cab637ad95d46316241666bb386de599f69eb3e018"`
[INFO] running `"docker" "rm" "-f" "f0206b0260a1aaed245379cab637ad95d46316241666bb386de599f69eb3e018"`
[INFO] [stdout] f0206b0260a1aaed245379cab637ad95d46316241666bb386de599f69eb3e018