[INFO] crate shell-rs 0.1.2 is already in cache
[INFO] checking shell-rs-0.1.2 against master#b61e69433951e31f7bd746e22f516a48ad41623b for prs-64470-and-65389
[INFO] extracting crate shell-rs 0.1.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate shell-rs 0.1.2 on toolchain b61e69433951e31f7bd746e22f516a48ad41623b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate shell-rs 0.1.2
[INFO] finished tweaking crates.io crate shell-rs 0.1.2
[INFO] tweaked toml for crates.io crate shell-rs 0.1.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate shell-rs 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+b61e69433951e31f7bd746e22f516a48ad41623b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-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" "+b61e69433951e31f7bd746e22f516a48ad41623b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d46dd9b6515d60d3643cbb60fac9353ec5911c86e0aaad178ebe97bd509e4a93
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "d46dd9b6515d60d3643cbb60fac9353ec5911c86e0aaad178ebe97bd509e4a93"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking nc v0.3.2
[INFO] [stderr] error[E0635]: unknown feature `const_slice_len`
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nc-0.3.2/src/lib.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(const_slice_len)]
[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 E0635`.
[INFO] [stderr] error: could not compile `nc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d46dd9b6515d60d3643cbb60fac9353ec5911c86e0aaad178ebe97bd509e4a93"`
[INFO] running `"docker" "rm" "-f" "d46dd9b6515d60d3643cbb60fac9353ec5911c86e0aaad178ebe97bd509e4a93"`
[INFO] [stdout] d46dd9b6515d60d3643cbb60fac9353ec5911c86e0aaad178ebe97bd509e4a93