[INFO] updating cached repository https://github.com/carbon-bond/carbonbond
[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] 39e10a2427f287442b752fcaf7d30872b0509bbb
[INFO] checking carbon-bond/carbonbond against try#5e633973aa9255a88b65a39484627bb54e6044b3 for pr-66063
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcarbon-bond%2Fcarbonbond" "/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/carbon-bond/carbonbond on toolchain 5e633973aa9255a88b65a39484627bb54e6044b3
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/carbon-bond/carbonbond
[INFO] finished tweaking git repo https://github.com/carbon-bond/carbonbond
[INFO] tweaked toml for git repo https://github.com/carbon-bond/carbonbond written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/carbon-bond/carbonbond already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+5e633973aa9255a88b65a39484627bb54e6044b3" "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] 7271994c1ffc306585cdcc2dd50d3af3f10687bcd3de56f74d514930e601066b
[INFO] running `"docker" "start" "-a" "7271994c1ffc306585cdcc2dd50d3af3f10687bcd3de56f74d514930e601066b"`
[INFO] [stderr]     Checking arc-swap v0.4.2
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]    Compiling getrandom v0.1.11
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking brotli-sys v0.3.2
[INFO] [stderr]     Checking ring v0.14.6
[INFO] [stderr]     Checking blake2b_simd v0.5.7
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling regex v1.2.1
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking signal-hook-registry v1.1.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking brotli2 v0.3.2
[INFO] [stderr]     Checking rustyline v5.0.2
[INFO] [stderr]    Compiling enum-as-inner v0.2.1
[INFO] [stderr]    Compiling actix-web-codegen v0.1.2
[INFO] [stderr]    Compiling v_escape_derive v0.5.5
[INFO] [stderr]    Compiling actix_derive v0.4.0
[INFO] [stderr]    Compiling derive_more v0.14.1
[INFO] [stderr]     Checking flate2 v1.0.11
[INFO] [stderr]     Checking rust-argon2 v0.5.1
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking signal-hook v0.1.10
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]     Checking v_escape v0.7.4
[INFO] [stderr]     Checking state v0.4.1
[INFO] [stderr]     Checking scheduled-thread-pool v0.2.2
[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/state-0.4.1/src/lib.rs:1:35
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(feature = "const_fn", feature(const_fn))]
[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 `state`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "7271994c1ffc306585cdcc2dd50d3af3f10687bcd3de56f74d514930e601066b"`
[INFO] running `"docker" "rm" "-f" "7271994c1ffc306585cdcc2dd50d3af3f10687bcd3de56f74d514930e601066b"`
[INFO] [stdout] 7271994c1ffc306585cdcc2dd50d3af3f10687bcd3de56f74d514930e601066b