[INFO] fetching crate ndless-freetype 0.1.3...
[INFO] testing ndless-freetype-0.1.3 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate ndless-freetype 0.1.3 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate ndless-freetype 0.1.3 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 ndless-freetype 0.1.3
[INFO] finished tweaking crates.io crate ndless-freetype 0.1.3
[INFO] tweaked toml for crates.io crate ndless-freetype 0.1.3 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] c9319c3ed6bab7a3a5e4c840385453993a55e854e75c781753ff958dfbb2c1cc
[INFO] running `"docker" "start" "-a" "c9319c3ed6bab7a3a5e4c840385453993a55e854e75c781753ff958dfbb2c1cc"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling cty v0.2.1
[INFO] [stderr]    Compiling cty v0.1.5
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling ndless-sys v0.2.0
[INFO] [stderr]    Compiling embedded-freetype-sys v0.2.0
[INFO] [stderr]    Compiling cstr_core v0.1.2
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cstr_core-0.1.2/src/lib.rs:12:32
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![cfg_attr(feature = "alloc", feature(alloc))]
[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 E0554`.
[INFO] [stderr] error: could not compile `cstr_core`.
[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" "c9319c3ed6bab7a3a5e4c840385453993a55e854e75c781753ff958dfbb2c1cc"`
[INFO] running `"docker" "rm" "-f" "c9319c3ed6bab7a3a5e4c840385453993a55e854e75c781753ff958dfbb2c1cc"`
[INFO] [stdout] c9319c3ed6bab7a3a5e4c840385453993a55e854e75c781753ff958dfbb2c1cc