[INFO] crate split-buffer 0.1.0 is already in cache
[INFO] testing split-buffer-0.1.0 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate split-buffer 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate split-buffer 0.1.0 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 crates.io crate split-buffer 0.1.0
[INFO] finished tweaking crates.io crate split-buffer 0.1.0
[INFO] tweaked toml for crates.io crate split-buffer 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate split-buffer 0.1.0 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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 6e7d45e6cf679e32406d9b195aff2425786057d27022fd7fdd111aabf991a5ed
[INFO] running `"docker" "start" "-a" "6e7d45e6cf679e32406d9b195aff2425786057d27022fd7fdd111aabf991a5ed"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling split-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `"docker" "inspect" "6e7d45e6cf679e32406d9b195aff2425786057d27022fd7fdd111aabf991a5ed"`
[INFO] running `"docker" "rm" "-f" "6e7d45e6cf679e32406d9b195aff2425786057d27022fd7fdd111aabf991a5ed"`
[INFO] [stdout] 6e7d45e6cf679e32406d9b195aff2425786057d27022fd7fdd111aabf991a5ed
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 5dd56e7ba881902ff3c846e8b661956c2a3ddda61302408b32761562baea40f9
[INFO] running `"docker" "start" "-a" "5dd56e7ba881902ff3c846e8b661956c2a3ddda61302408b32761562baea40f9"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling split-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0277]: `split_buffer::Buffer` doesn't implement `std::fmt::Debug`
[INFO] [stderr]  --> examples/simple.rs:7:22
[INFO] [stderr]   |
[INFO] [stderr] 7 |     println!("{:?}", &buf);
[INFO] [stderr]   |                      ^^^^ `split_buffer::Buffer` cannot be formatted using `{:?}` because it doesn't implement `std::fmt::Debug`
[INFO] [stderr]   |
[INFO] [stderr]   = help: the trait `std::fmt::Debug` is not implemented for `split_buffer::Buffer`
[INFO] [stderr]   = note: required because of the requirements on the impl of `std::fmt::Debug` for `&split_buffer::Buffer`
[INFO] [stderr]   = note: required by `std::fmt::Debug::fmt`
[INFO] [stderr]   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `split-buffer`.
[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" "5dd56e7ba881902ff3c846e8b661956c2a3ddda61302408b32761562baea40f9"`
[INFO] running `"docker" "rm" "-f" "5dd56e7ba881902ff3c846e8b661956c2a3ddda61302408b32761562baea40f9"`
[INFO] [stdout] 5dd56e7ba881902ff3c846e8b661956c2a3ddda61302408b32761562baea40f9