[INFO] fetching crate swc_ecma_parser 0.10.3...
[INFO] checking swc_ecma_parser-0.10.3 against beta-2019-10-27 for pr-65897
[INFO] extracting crate swc_ecma_parser 0.10.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate swc_ecma_parser 0.10.3 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 crates.io crate swc_ecma_parser 0.10.3
[INFO] finished tweaking crates.io crate swc_ecma_parser 0.10.3
[INFO] tweaked toml for crates.io crate swc_ecma_parser 0.10.3 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] daa31f61169eef26af4b916b77a43ea4384eaa69ac1cb32a4e5cb1bbfd963afc
[INFO] running `"docker" "start" "-a" "daa31f61169eef26af4b916b77a43ea4384eaa69ac1cb32a4e5cb1bbfd963afc"`
[INFO] [stderr]     Checking relative-path v0.4.0
[INFO] [stderr]    Compiling pmutil v0.3.0
[INFO] [stderr]    Compiling darling_core v0.8.6
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]    Compiling swc_atoms v0.1.2
[INFO] [stderr]     Checking string_cache v0.7.5
[INFO] [stderr]    Compiling swc_macros_common v0.2.0
[INFO] [stderr]    Compiling string_enum v0.2.0
[INFO] [stderr]    Compiling enum_kind v0.1.3
[INFO] [stderr]    Compiling swc_ecma_parser_macros v0.3.0
[INFO] [stderr]    Compiling darling_macro v0.8.6
[INFO] [stderr]    Compiling darling v0.8.6
[INFO] [stderr]    Compiling ast_node v0.4.2
[INFO] [stderr]     Checking swc_common v0.3.1
[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/swc_common-0.3.1/src/lib.rs:1:31
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(feature = "fold", feature(specialization))]
[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 `swc_common`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "daa31f61169eef26af4b916b77a43ea4384eaa69ac1cb32a4e5cb1bbfd963afc"`
[INFO] running `"docker" "rm" "-f" "daa31f61169eef26af4b916b77a43ea4384eaa69ac1cb32a4e5cb1bbfd963afc"`
[INFO] [stdout] daa31f61169eef26af4b916b77a43ea4384eaa69ac1cb32a4e5cb1bbfd963afc