[INFO] updating cached repository https://github.com/gugahoa/ww-subscribe
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 53eb69877330b1d117e6f155f80add6fb3d3d02e
[INFO] checking gugahoa/ww-subscribe against try#8810c24b0958114d8dbb32d878444e8956fce80f for pr-66063
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgugahoa%2Fww-subscribe" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gugahoa/ww-subscribe on toolchain 8810c24b0958114d8dbb32d878444e8956fce80f
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/gugahoa/ww-subscribe
[INFO] finished tweaking git repo https://github.com/gugahoa/ww-subscribe
[INFO] tweaked toml for git repo https://github.com/gugahoa/ww-subscribe written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/gugahoa/ww-subscribe already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+8810c24b0958114d8dbb32d878444e8956fce80f" "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] e15e01d634b238febf538c9af1e748bb6bc7b55b6a2acc94feff3f196c555871
[INFO] running `"docker" "start" "-a" "e15e01d634b238febf538c9af1e748bb6bc7b55b6a2acc94feff3f196c555871"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v0.15.32
[INFO] [stderr]    Compiling derive_builder v0.7.1
[INFO] [stderr]     Checking erased-serde v0.3.9
[INFO] [stderr]    Compiling telebot-derive v0.0.12
[INFO] [stderr]     Checking uuid v0.6.5
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking tokio-threadpool v0.1.14
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking publicsuffix v1.5.2
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/telebot-derive-0.0.12/src/lib.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 |     #![feature(try_from)]
[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 `telebot-derive`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e15e01d634b238febf538c9af1e748bb6bc7b55b6a2acc94feff3f196c555871"`
[INFO] running `"docker" "rm" "-f" "e15e01d634b238febf538c9af1e748bb6bc7b55b6a2acc94feff3f196c555871"`
[INFO] [stdout] e15e01d634b238febf538c9af1e748bb6bc7b55b6a2acc94feff3f196c555871