[INFO] crate cargo-ipcgen-swift 0.0.1 is already in cache
[INFO] checking cargo-ipcgen-swift-0.0.1 against beta-2019-10-27 for pr-65897
[INFO] extracting crate cargo-ipcgen-swift 0.0.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate cargo-ipcgen-swift 0.0.1 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 cargo-ipcgen-swift 0.0.1
[INFO] finished tweaking crates.io crate cargo-ipcgen-swift 0.0.1
[INFO] tweaked toml for crates.io crate cargo-ipcgen-swift 0.0.1 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] fdf2e10e728be0fd7a366fb0448679d441007a519d729e6c307433840e764523
[INFO] running `"docker" "start" "-a" "fdf2e10e728be0fd7a366fb0448679d441007a519d729e6c307433840e764523"`
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]     Checking nibble_vec v0.0.4
[INFO] [stderr]     Checking term v0.4.6
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]     Checking rls-span v0.4.1
[INFO] [stderr]    Compiling extprim v1.7.0
[INFO] [stderr]    Compiling derive-new v0.5.8
[INFO] [stderr]     Checking radix_trie v0.1.5
[INFO] [stderr]     Checking rls-data v0.16.0
[INFO] [stderr]     Checking rls-analysis v0.13.0
[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/rls-analysis-0.13.0/src/lib.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(type_ascription)]
[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 `rls-analysis`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "fdf2e10e728be0fd7a366fb0448679d441007a519d729e6c307433840e764523"`
[INFO] running `"docker" "rm" "-f" "fdf2e10e728be0fd7a366fb0448679d441007a519d729e6c307433840e764523"`
[INFO] [stdout] fdf2e10e728be0fd7a366fb0448679d441007a519d729e6c307433840e764523