[INFO] fetching crate lamport_signature 0.1.4...
[INFO] checking lamport_signature-0.1.4 against beta for pr-78714
[INFO] extracting crate lamport_signature 0.1.4 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate lamport_signature 0.1.4 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lamport_signature 0.1.4
[INFO] finished tweaking crates.io crate lamport_signature 0.1.4
[INFO] tweaked toml for crates.io crate lamport_signature 0.1.4 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a99a6442fe2eceb2f09aefa87f36df5ad219f25e29e448a280ab13371eabaea3
[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" "a99a6442fe2eceb2f09aefa87f36df5ad219f25e29e448a280ab13371eabaea3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a99a6442fe2eceb2f09aefa87f36df5ad219f25e29e448a280ab13371eabaea3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a99a6442fe2eceb2f09aefa87f36df5ad219f25e29e448a280ab13371eabaea3", kill_on_drop: false }`
[INFO] [stdout] a99a6442fe2eceb2f09aefa87f36df5ad219f25e29e448a280ab13371eabaea3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63af733f78c8fde203c47e80d5ed8fd70ff98e2fa318308f5eca40aa4e7fd1f8
[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" "63af733f78c8fde203c47e80d5ed8fd70ff98e2fa318308f5eca40aa4e7fd1f8", kill_on_drop: false }`
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking keccak v0.1.0
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]     Checking env_logger v0.5.13
[INFO] [stderr]     Checking digest v0.7.6
[INFO] [stderr]     Checking block-buffer v0.2.0-tmp
[INFO] [stderr]     Checking crypto-mac v0.5.2
[INFO] [stderr]     Checking blake2 v0.7.1
[INFO] [stderr]     Checking sha3 v0.7.3
[INFO] [stderr]     Checking whirlpool v0.7.1
[INFO] [stderr]     Checking sha2 v0.7.1
[INFO] [stderr]     Checking groestl v0.7.0
[INFO] [stderr]     Checking lamport_signature v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![feature(test, iterator_flatten)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![feature(test, iterator_flatten)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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 `lamport_signature`
[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] [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: build failed
[INFO] running `Command { std: "docker" "inspect" "63af733f78c8fde203c47e80d5ed8fd70ff98e2fa318308f5eca40aa4e7fd1f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63af733f78c8fde203c47e80d5ed8fd70ff98e2fa318308f5eca40aa4e7fd1f8", kill_on_drop: false }`
[INFO] [stdout] 63af733f78c8fde203c47e80d5ed8fd70ff98e2fa318308f5eca40aa4e7fd1f8