[INFO] fetching crate geen 0.0.7...
[INFO] testing geen-0.0.7 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate geen 0.0.7 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate geen 0.0.7 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate geen 0.0.7
[INFO] finished tweaking crates.io crate geen 0.0.7
[INFO] tweaked toml for crates.io crate geen 0.0.7 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded const-random v0.1.13
[INFO] [stderr]   Downloaded const-random-macro v0.1.13
[INFO] [stderr]   Downloaded thread-id v3.3.0
[INFO] [stderr]   Downloaded ahash v0.2.19
[INFO] [stderr]   Downloaded crunchy v0.2.2
[INFO] [stderr]   Downloaded hashbrown v0.6.3
[INFO] [stderr]   Downloaded cexpr v0.2.3
[INFO] [stderr]   Downloaded tiny-keccak v2.0.2
[INFO] [stderr]   Downloaded rustc-hex v2.1.0
[INFO] [stderr]   Downloaded proc-macro2 v0.3.5
[INFO] [stderr]   Downloaded croaring-sys v0.3.9
[INFO] [stderr]   Downloaded bindgen v0.37.4
[INFO] [stderr]   Downloaded uint v0.8.5
[INFO] [stderr]   Downloaded mohan v0.0.53
[INFO] [stderr]   Downloaded croaring v0.3.9
[INFO] [stderr]   Downloaded quote v0.5.2
[INFO] [stderr]   Downloaded which v1.0.5
[INFO] [stderr]   Downloaded clang-sys v0.23.0
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7b70b20b73629b643e5bd77510fc85c8b9d8f97022bb568cc53048e69e9a8d0a
[INFO] running `Command { std: "docker" "start" "-a" "7b70b20b73629b643e5bd77510fc85c8b9d8f97022bb568cc53048e69e9a8d0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b70b20b73629b643e5bd77510fc85c8b9d8f97022bb568cc53048e69e9a8d0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b70b20b73629b643e5bd77510fc85c8b9d8f97022bb568cc53048e69e9a8d0a", kill_on_drop: false }`
[INFO] [stdout] 7b70b20b73629b643e5bd77510fc85c8b9d8f97022bb568cc53048e69e9a8d0a
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e70eaaef4645d35b4812d397140ef38b5662d9b3a0f6e95da217122698dd4e06
[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" "e70eaaef4645d35b4812d397140ef38b5662d9b3a0f6e95da217122698dd4e06", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling const_fn v0.4.4
[INFO] [stderr]    Compiling bindgen v0.37.4
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling getrandom v0.2.1
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling packed_simd v0.3.3
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling smallvec v1.6.0
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling subtle v2.4.0
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling rustc-hex v2.1.0
[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/subtle-2.4.0/src/lib.rs:12:34
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![cfg_attr(feature = "nightly", feature(external_doc))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `subtle`
[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" "e70eaaef4645d35b4812d397140ef38b5662d9b3a0f6e95da217122698dd4e06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e70eaaef4645d35b4812d397140ef38b5662d9b3a0f6e95da217122698dd4e06", kill_on_drop: false }`
[INFO] [stdout] e70eaaef4645d35b4812d397140ef38b5662d9b3a0f6e95da217122698dd4e06