[INFO] updating cached repository https://github.com/peterdelevoryas/test-session-types
[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] 676fb4f17d1cc3acafd70d9d63677df717e96e43
[INFO] testing peterdelevoryas/test-session-types against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeterdelevoryas%2Ftest-session-types" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/peterdelevoryas/test-session-types 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/peterdelevoryas/test-session-types
[INFO] finished tweaking git repo https://github.com/peterdelevoryas/test-session-types
[INFO] tweaked toml for git repo https://github.com/peterdelevoryas/test-session-types written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/peterdelevoryas/test-session-types 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]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 1936c5aa9a3ff77f230e93f7c51ec490a7ae6dab06a34992dd3e3f99dc3ac52c
[INFO] running `"docker" "start" "-a" "1936c5aa9a3ff77f230e93f7c51ec490a7ae6dab06a34992dd3e3f99dc3ac52c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling test-session-types v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `core::nonzero`
[INFO] [stderr]  --> src/main.rs:4:11
[INFO] [stderr]   |
[INFO] [stderr] 4 | use core::nonzero::NonZero;
[INFO] [stderr]   |           ^^^^^^^ could not find `nonzero` in `core`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(nonzero)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `test-session-types`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1936c5aa9a3ff77f230e93f7c51ec490a7ae6dab06a34992dd3e3f99dc3ac52c"`
[INFO] running `"docker" "rm" "-f" "1936c5aa9a3ff77f230e93f7c51ec490a7ae6dab06a34992dd3e3f99dc3ac52c"`
[INFO] [stdout] 1936c5aa9a3ff77f230e93f7c51ec490a7ae6dab06a34992dd3e3f99dc3ac52c