[INFO] cloning repository https://github.com/jensjp/sparc_os
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jensjp/sparc_os" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjensjp%2Fsparc_os"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjensjp%2Fsparc_os'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6a6082f8e10665c1ca0296876d76d4028196fbff
[INFO] testing jensjp/sparc_os against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjensjp%2Fsparc_os" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jensjp/sparc_os 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/jensjp/sparc_os
[INFO] finished tweaking git repo https://github.com/jensjp/sparc_os
[INFO] tweaked toml for git repo https://github.com/jensjp/sparc_os written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/jensjp/sparc_os 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] [stderr] warning: unused manifest key: build
[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=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] e3f2103c78ca56478b35d50e53554ac2a7daa9c3dcf86cd1c0fcf06588c17ad8
[INFO] running `"docker" "start" "-a" "e3f2103c78ca56478b35d50e53554ac2a7daa9c3dcf86cd1c0fcf06588c17ad8"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused manifest key: build
[INFO] [stderr]    Compiling bootloader v0.8.9
[INFO] [stderr]    Compiling volatile v0.2.6
[INFO] [stderr] error[E0463]: can't find crate for `core`
[INFO] [stderr]   |
[INFO] [stderr]   = note: the `x86_64-sparc_os-10246217380972169643` target may not be installed
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `volatile`.
[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" "e3f2103c78ca56478b35d50e53554ac2a7daa9c3dcf86cd1c0fcf06588c17ad8"`
[INFO] running `"docker" "rm" "-f" "e3f2103c78ca56478b35d50e53554ac2a7daa9c3dcf86cd1c0fcf06588c17ad8"`
[INFO] [stdout] e3f2103c78ca56478b35d50e53554ac2a7daa9c3dcf86cd1c0fcf06588c17ad8