[INFO] crate constellation-rs 0.2.0-alpha.2 is already in cache
[INFO] testing constellation-rs-0.2.0-alpha.2 against beta-2020-07-24 for beta-1.46-1
[INFO] extracting crate constellation-rs 0.2.0-alpha.2 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate constellation-rs 0.2.0-alpha.2 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate constellation-rs 0.2.0-alpha.2
[INFO] removed 1 missing tests
[INFO] finished tweaking crates.io crate constellation-rs 0.2.0-alpha.2
[INFO] tweaked toml for crates.io crate constellation-rs 0.2.0-alpha.2 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate constellation-rs 0.2.0-alpha.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a95611cb4adf0121bc5eab12bb7b40448640611c907f0326f6b188218ca98d7b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a95611cb4adf0121bc5eab12bb7b40448640611c907f0326f6b188218ca98d7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a95611cb4adf0121bc5eab12bb7b40448640611c907f0326f6b188218ca98d7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a95611cb4adf0121bc5eab12bb7b40448640611c907f0326f6b188218ca98d7b", kill_on_drop: false }`
[INFO] [stdout] a95611cb4adf0121bc5eab12bb7b40448640611c907f0326f6b188218ca98d7b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a6d07a1ad142dbd4c53724ae92d7f43f2d227ae3924bcd348dc1a3b495fa7ad
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2a6d07a1ad142dbd4c53724ae92d7f43f2d227ae3924bcd348dc1a3b495fa7ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.34
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling nom v2.2.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling build_id v0.2.1
[INFO] [stderr]    Compiling twox-hash v1.5.0
[INFO] [stderr]    Compiling futures-core v0.3.5
[INFO] [stderr]    Compiling nix v0.16.1
[INFO] [stderr]    Compiling serde_json v1.0.56
[INFO] [stderr]    Compiling relative v0.2.2
[INFO] [stderr]    Compiling libflate_lz77 v1.0.0
[INFO] [stderr]    Compiling replace_with v0.1.5
[INFO] [stderr]    Compiling constellation-rs v0.2.0-alpha.2 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling metatype v0.2.0
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/metatype-0.2.0/src/lib.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | #![feature(arbitrary_self_types)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/metatype-0.2.0/src/lib.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![feature(raw)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/metatype-0.2.0/src/lib.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | #![feature(slice_from_raw_parts)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/metatype-0.2.0/src/lib.rs:37:1
[INFO] [stdout]    |
[INFO] [stdout] 37 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metatype`.
[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 `Command { std: "docker" "inspect" "2a6d07a1ad142dbd4c53724ae92d7f43f2d227ae3924bcd348dc1a3b495fa7ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a6d07a1ad142dbd4c53724ae92d7f43f2d227ae3924bcd348dc1a3b495fa7ad", kill_on_drop: false }`
[INFO] [stdout] 2a6d07a1ad142dbd4c53724ae92d7f43f2d227ae3924bcd348dc1a3b495fa7ad