[INFO] fetching crate heapsize_plugin 0.1.6...
[INFO] testing heapsize_plugin-0.1.6 against 1.44.0 for beta-1.45-1
[INFO] extracting crate heapsize_plugin 0.1.6 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate heapsize_plugin 0.1.6 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate heapsize_plugin 0.1.6
[INFO] removed path dependency heapsize from crates.io crate heapsize_plugin 0.1.6
[INFO] finished tweaking crates.io crate heapsize_plugin 0.1.6
[INFO] tweaked toml for crates.io crate heapsize_plugin 0.1.6 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+1.44.0" "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] 6e339e5aad9cfdcc4290b45187d0c7a056e2b429691407813c1ee9b736ab5cc3
[INFO] running `"docker" "start" "-a" "6e339e5aad9cfdcc4290b45187d0c7a056e2b429691407813c1ee9b736ab5cc3"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling heapsize_plugin v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]   --> src/lib.rs:10:30
[INFO] [stderr]    |
[INFO] [stderr] 10 | #![feature(plugin_registrar, quote, plugin, box_syntax, rustc_private)]
[INFO] [stderr]    |                              ^^^^^ feature has been removed
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `syntax`
[INFO] [stderr]   --> src/lib.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | extern crate syntax;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0463, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0463`.
[INFO] [stderr] error: could not compile `heapsize_plugin`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6e339e5aad9cfdcc4290b45187d0c7a056e2b429691407813c1ee9b736ab5cc3"`
[INFO] running `"docker" "rm" "-f" "6e339e5aad9cfdcc4290b45187d0c7a056e2b429691407813c1ee9b736ab5cc3"`
[INFO] [stdout] 6e339e5aad9cfdcc4290b45187d0c7a056e2b429691407813c1ee9b736ab5cc3