[INFO] updating cached repository https://github.com/kdar/rust-socket-activation
[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] bf5103a3f2b2feb7dc86b29b576de13e1439b68a
[INFO] checking kdar/rust-socket-activation against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdar%2Frust-socket-activation" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kdar/rust-socket-activation 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/kdar/rust-socket-activation
[INFO] finished tweaking git repo https://github.com/kdar/rust-socket-activation
[INFO] tweaked toml for git repo https://github.com/kdar/rust-socket-activation written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/kdar/rust-socket-activation 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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] a93cb2072b239ff18576cabcb31d3050242af2340f6e3bcf8a84e93b6ed673eb
[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" "a93cb2072b239ff18576cabcb31d3050242af2340f6e3bcf8a84e93b6ed673eb"`
[INFO] [stderr]     Checking libc v0.2.31
[INFO] [stderr]     Checking lazycell v0.5.1
[INFO] [stderr]     Checking stable_deref_trait v1.0.0
[INFO] [stderr]     Checking futures v0.1.16
[INFO] [stderr]     Checking utf8-cstr v0.1.6
[INFO] [stderr]    Compiling semver v0.6.0
[INFO] [stderr]    Compiling libsystemd-sys v0.1.0
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]    Compiling rustc_version v0.2.1
[INFO] [stderr]     Checking iovec v0.1.0
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking bytes v0.4.5
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]    Compiling mbox v0.4.1
[INFO] [stderr]     Checking mio v0.6.10
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr] error: unexpected token: `<-`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mbox-0.4.1/src/mbox.rs:192:16
[INFO] [stderr]     |
[INFO] [stderr] 192 |         MALLOC <- value.clone()
[INFO] [stderr]     |                ^^
[INFO] [stderr] help: if you meant to write a comparison against a negative value, add a space in between `<` and `-`
[INFO] [stderr]     |
[INFO] [stderr] 192 |         MALLOC < - value.clone()
[INFO] [stderr]     |                ^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `mbox`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a93cb2072b239ff18576cabcb31d3050242af2340f6e3bcf8a84e93b6ed673eb"`
[INFO] running `"docker" "rm" "-f" "a93cb2072b239ff18576cabcb31d3050242af2340f6e3bcf8a84e93b6ed673eb"`
[INFO] [stdout] a93cb2072b239ff18576cabcb31d3050242af2340f6e3bcf8a84e93b6ed673eb