[INFO] updating cached repository https://github.com/lynncyrin/galaxy-gen
[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] 090ac8929653767d1f79021d6503bbe85f0bcfd2
[INFO] checking lynncyrin/galaxy-gen against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flynncyrin%2Fgalaxy-gen" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lynncyrin/galaxy-gen 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/lynncyrin/galaxy-gen
[INFO] finished tweaking git repo https://github.com/lynncyrin/galaxy-gen
[INFO] tweaked toml for git repo https://github.com/lynncyrin/galaxy-gen written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/lynncyrin/galaxy-gen 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] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[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-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" "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] [stdout] b450bc4df92f9c93ac88b23f62b4d65dbf6414397a7912c2964da5524fdb3633
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "b450bc4df92f9c93ac88b23f62b4d65dbf6414397a7912c2964da5524fdb3633"`
[INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.21
[INFO] [stderr]     Checking slog v2.3.3
[INFO] [stderr]    Compiling wasm-bindgen v0.2.21
[INFO] [stderr]     Checking memchr v2.0.2
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]     Checking termios v0.3.0
[INFO] [stderr]     Checking isatty v0.1.9
[INFO] [stderr]     Checking term v0.5.1
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]    Compiling serde v1.0.78
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]     Checking lock_api v0.1.3
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking toml v0.4.6
[INFO] [stderr]     Checking serde_json v1.0.27
[INFO] [stderr]    Compiling syn v0.15.4
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]     Checking aho-corasick v0.6.8
[INFO] [stderr]     Checking parking_lot_core v0.3.1
[INFO] [stderr]     Checking hibitset v0.5.2
[INFO] [stderr]     Checking shred v0.7.0
[INFO] [stderr]     Checking parking_lot v0.5.5
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking regex v1.0.5
[INFO] [stderr]     Checking slog-async v2.3.0
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking shrev v1.0.1
[INFO] [stderr]     Checking specs v0.12.2
[INFO] [stderr]     Checking slog-term v2.4.0
[INFO] [stderr]     Checking os_type v2.0.0
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking indicatif v0.9.0
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]    Compiling structopt-derive v0.2.10
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]    Compiling serde_derive v1.0.78
[INFO] [stderr]     Checking structopt v0.2.10
[INFO] [stderr]     Checking human-panic v1.0.1
[INFO] [stderr]     Checking wasm-pack v0.4.2
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.21
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.21
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.21
[INFO] [stderr]     Checking galaxy_gen_backend v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/rust/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_prelude, custom_attribute)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/rust/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_prelude, custom_attribute)]
[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 `galaxy_gen_backend`.
[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 `galaxy_gen_backend`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b450bc4df92f9c93ac88b23f62b4d65dbf6414397a7912c2964da5524fdb3633"`
[INFO] running `"docker" "rm" "-f" "b450bc4df92f9c93ac88b23f62b4d65dbf6414397a7912c2964da5524fdb3633"`
[INFO] [stdout] b450bc4df92f9c93ac88b23f62b4d65dbf6414397a7912c2964da5524fdb3633