[INFO] updating cached repository https://github.com/bokuweb/wu-diff-rs
[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] 442be7095f7ef710c6ef74c004a54940917d7143
[INFO] testing bokuweb/wu-diff-rs against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbokuweb%2Fwu-diff-rs" "/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/bokuweb/wu-diff-rs on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bokuweb/wu-diff-rs
[INFO] finished tweaking git repo https://github.com/bokuweb/wu-diff-rs
[INFO] tweaked toml for git repo https://github.com/bokuweb/wu-diff-rs written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/bokuweb/wu-diff-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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=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" "+beta-2020-06-03" "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] daecf2229828b3c976c335e1c86fe2106c5054c28a4ecc089440ecadfa28a95a
[INFO] running `"docker" "start" "-a" "daecf2229828b3c976c335e1c86fe2106c5054c28a4ecc089440ecadfa28a95a"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling wu-diff v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `"docker" "inspect" "daecf2229828b3c976c335e1c86fe2106c5054c28a4ecc089440ecadfa28a95a"`
[INFO] running `"docker" "rm" "-f" "daecf2229828b3c976c335e1c86fe2106c5054c28a4ecc089440ecadfa28a95a"`
[INFO] [stdout] daecf2229828b3c976c335e1c86fe2106c5054c28a4ecc089440ecadfa28a95a
[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=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" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] beea3f926861873f1c42576ce1093a64da76cc553fa001e7f7843a4ada3a33b7
[INFO] running `"docker" "start" "-a" "beea3f926861873f1c42576ce1093a64da76cc553fa001e7f7843a4ada3a33b7"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling byteorder v1.2.2
[INFO] [stderr]    Compiling cc v1.0.10
[INFO] [stderr]    Compiling regex v0.2.10
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]    Compiling serde v1.0.42
[INFO] [stderr]    Compiling cast v0.2.2
[INFO] [stderr]    Compiling thread-scoped v1.0.2
[INFO] [stderr]    Compiling quick-error v1.2.1
[INFO] [stderr]    Compiling num-integer v0.1.36
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling time v0.1.39
[INFO] [stderr]    Compiling atty v0.2.9
[INFO] [stderr]    Compiling inflate v0.3.4
[INFO] [stderr]    Compiling regex-syntax v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling gif v0.9.2
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling clap v2.31.2
[INFO] [stderr]    Compiling itertools-num v0.1.1
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling num-iter v0.1.35
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling criterion-stats v0.2.3
[INFO] [stderr]    Compiling chrono v0.4.2
[INFO] [stderr]    Compiling syn v0.13.1
[INFO] [stderr]    Compiling deflate v0.7.18
[INFO] [stderr]    Compiling term v0.5.1
[INFO] [stderr]    Compiling criterion-plot v0.2.3
[INFO] [stderr]    Compiling base64 v0.9.2
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling pest_derive v1.0.7
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling png v0.11.0
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling simplelog v0.5.1
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling serde_derive v1.0.42
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling image v0.18.0
[INFO] [stderr]    Compiling serde_json v1.0.16
[INFO] [stderr]    Compiling backtrace v0.3.6
[INFO] [stderr]    Compiling handlebars v0.31.0
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling criterion v0.2.3
[INFO] [stderr]    Compiling wu-diff v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> tests/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(extern_prelude)]
[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 `wu-diff`.
[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" "beea3f926861873f1c42576ce1093a64da76cc553fa001e7f7843a4ada3a33b7"`
[INFO] running `"docker" "rm" "-f" "beea3f926861873f1c42576ce1093a64da76cc553fa001e7f7843a4ada3a33b7"`
[INFO] [stdout] beea3f926861873f1c42576ce1093a64da76cc553fa001e7f7843a4ada3a33b7