[INFO] updating cached repository https://github.com/ruby-on-rust/ruby-on-rust
[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] 425dffcbe3e7f1d8371743c73d56412bcc9e1477
[INFO] checking ruby-on-rust/ruby-on-rust against beta-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fruby-on-rust%2Fruby-on-rust" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ruby-on-rust/ruby-on-rust 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/ruby-on-rust/ruby-on-rust
[INFO] finished tweaking git repo https://github.com/ruby-on-rust/ruby-on-rust
[INFO] tweaked toml for git repo https://github.com/ruby-on-rust/ruby-on-rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ruby-on-rust/ruby-on-rust 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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] d56778041e54a1e982332ed3e332ff8f853a9f4406a3fc5bea1e1ace1e50467b
[INFO] running `"docker" "start" "-a" "d56778041e54a1e982332ed3e332ff8f853a9f4406a3fc5bea1e1ace1e50467b"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.17
[INFO] [stderr]     Checking strum v0.10.0
[INFO] [stderr]     Checking regex v1.0.4
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling strum_macros v0.10.0
[INFO] [stderr]     Checking ruby_on_rust v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `ruby_on_rust`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --edition=2018 --crate-name ruby_on_rust src/lib.rs --color never --crate-type lib --emit=dep-info,metadata -C debuginfo=2 -C metadata=b337f0cd4eea7860 -C extra-filename=-b337f0cd4eea7860 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-24dfbfc93285196e.rmeta --extern maplit=/opt/rustwide/target/debug/deps/libmaplit-17d5cd07a5035076.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-8425628108928a5d.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-d0eab682b6c46df9.rmeta --extern strum_macros=/opt/rustwide/target/debug/deps/libstrum_macros-918c237512d0409f.so --extern uuid=/opt/rustwide/target/debug/deps/libuuid-5e42bad12bb6bbcb.rmeta --cap-lints=allow` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `ruby_on_rust`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --edition=2018 --crate-name ruby_on_rust src/lib.rs --color never --emit=dep-info,metadata -C debuginfo=2 --test -C metadata=1e39132fe9d731a4 -C extra-filename=-1e39132fe9d731a4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-24dfbfc93285196e.rmeta --extern maplit=/opt/rustwide/target/debug/deps/libmaplit-17d5cd07a5035076.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-8425628108928a5d.rmeta --extern strum=/opt/rustwide/target/debug/deps/libstrum-d0eab682b6c46df9.rmeta --extern strum_macros=/opt/rustwide/target/debug/deps/libstrum_macros-918c237512d0409f.so --extern uuid=/opt/rustwide/target/debug/deps/libuuid-5e42bad12bb6bbcb.rmeta --cap-lints=allow` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "d56778041e54a1e982332ed3e332ff8f853a9f4406a3fc5bea1e1ace1e50467b"`
[INFO] running `"docker" "rm" "-f" "d56778041e54a1e982332ed3e332ff8f853a9f4406a3fc5bea1e1ace1e50467b"`
[INFO] [stdout] d56778041e54a1e982332ed3e332ff8f853a9f4406a3fc5bea1e1ace1e50467b