[INFO] updating cached repository https://github.com/souvik1997/fsbench
[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] 77cc337e9e88a07ae9381abb4710f4c1b4ae2423
[INFO] checking souvik1997/fsbench against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsouvik1997%2Ffsbench" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/souvik1997/fsbench 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/souvik1997/fsbench
[INFO] finished tweaking git repo https://github.com/souvik1997/fsbench
[INFO] tweaked toml for git repo https://github.com/souvik1997/fsbench written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/souvik1997/fsbench 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] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 334d26d7074ebb033ef56e140c9eedc71c6df31cff28b72d11628f4fb9631fb9
[INFO] running `"docker" "start" "-a" "334d26d7074ebb033ef56e140c9eedc71c6df31cff28b72d11628f4fb9631fb9"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking serde v1.0.29
[INFO] [stderr]    Compiling num-traits v0.2.2
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking colored v1.6.0
[INFO] [stderr]    Compiling syn v0.12.14
[INFO] [stderr]     Checking crossbeam-epoch v0.3.0
[INFO] [stderr]     Checking nix v0.10.0
[INFO] [stderr]     Checking remove_dir_all v0.3.0
[INFO] [stderr]     Checking tempdir v0.3.6
[INFO] [stderr]     Checking fern v0.5.2
[INFO] [stderr]     Checking num-bigint v0.1.43
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking rayon-core v1.4.0
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking rayon v1.0.0
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]    Compiling serde_derive_internals v0.20.0
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]    Compiling num-derive v0.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.29
[INFO] [stderr]     Checking serde_json v1.0.11
[INFO] [stderr]     Checking fsbench v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_extras)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_extras)]
[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 `fsbench`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `fsbench`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "334d26d7074ebb033ef56e140c9eedc71c6df31cff28b72d11628f4fb9631fb9"`
[INFO] running `"docker" "rm" "-f" "334d26d7074ebb033ef56e140c9eedc71c6df31cff28b72d11628f4fb9631fb9"`
[INFO] [stdout] 334d26d7074ebb033ef56e140c9eedc71c6df31cff28b72d11628f4fb9631fb9