[INFO] crate aloft 0.3.1 is already in cache
[INFO] testing aloft-0.3.1 against 1.44.0 for beta-1.45-1
[INFO] extracting crate aloft 0.3.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate aloft 0.3.1 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate aloft 0.3.1
[INFO] finished tweaking crates.io crate aloft 0.3.1
[INFO] tweaked toml for crates.io crate aloft 0.3.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7f5b3f51422dca345b20ee5b26d80d60e8a9ce557b410696ab48bd115a75f04b
[INFO] running `"docker" "start" "-a" "7f5b3f51422dca345b20ee5b26d80d60e8a9ce557b410696ab48bd115a75f04b"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling libc v0.1.12
[INFO] [stderr]    Compiling lazy_static v0.1.16
[INFO] [stderr]    Compiling bitflags v0.3.3
[INFO] [stderr]    Compiling traitobject v0.0.1
[INFO] [stderr]    Compiling typeable v0.1.2
[INFO] [stderr]    Compiling httparse v0.1.6
[INFO] [stderr]    Compiling unicase v0.1.0
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num_cpus v0.2.13
[INFO] [stderr]    Compiling mime v0.0.11
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-0.1.80/src/lib.rs:451:34
[INFO] [stderr]     |
[INFO] [stderr] 451 | #![cfg_attr(feature = "pattern", feature(pattern))]
[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 `regex`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "7f5b3f51422dca345b20ee5b26d80d60e8a9ce557b410696ab48bd115a75f04b"`
[INFO] running `"docker" "rm" "-f" "7f5b3f51422dca345b20ee5b26d80d60e8a9ce557b410696ab48bd115a75f04b"`
[INFO] [stdout] 7f5b3f51422dca345b20ee5b26d80d60e8a9ce557b410696ab48bd115a75f04b