[INFO] fetching crate ssb-common 0.3.0...
[INFO] checking ssb-common-0.3.0 against beta for pr-78714
[INFO] extracting crate ssb-common 0.3.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate ssb-common 0.3.0 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 ssb-common 0.3.0
[INFO] finished tweaking crates.io crate ssb-common 0.3.0
[INFO] tweaked toml for crates.io crate ssb-common 0.3.0 written to /workspace/builds/worker-6/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] 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-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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] babe16bbc4d7603a568f66906489c536c6b2dd139275014dc2b6005f26a21d7b
[INFO] running `Command { std: "docker" "start" "-a" "babe16bbc4d7603a568f66906489c536c6b2dd139275014dc2b6005f26a21d7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "babe16bbc4d7603a568f66906489c536c6b2dd139275014dc2b6005f26a21d7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "babe16bbc4d7603a568f66906489c536c6b2dd139275014dc2b6005f26a21d7b", kill_on_drop: false }`
[INFO] [stdout] babe16bbc4d7603a568f66906489c536c6b2dd139275014dc2b6005f26a21d7b
[INFO] running `Command { std: "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" "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] 22f7d00ef89182a02b4b070a5401835bcc2b582cc4ae419827a70a6f46b27d74
[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" "22f7d00ef89182a02b4b070a5401835bcc2b582cc4ae419827a70a6f46b27d74", kill_on_drop: false }`
[INFO] [stderr]     Checking ucd-util v0.1.8
[INFO] [stderr]     Checking utf8-ranges v1.0.4
[INFO] [stderr]    Compiling secret_handshake v4.0.0
[INFO] [stderr]    Compiling libsodium-sys v0.0.16
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking sodiumoxide v0.0.16
[INFO] [stderr]     Checking atm-io-utils v0.1.0
[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/secret_handshake-4.0.0/src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(unique)]
[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 `secret_handshake`
[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" "22f7d00ef89182a02b4b070a5401835bcc2b582cc4ae419827a70a6f46b27d74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22f7d00ef89182a02b4b070a5401835bcc2b582cc4ae419827a70a6f46b27d74", kill_on_drop: false }`
[INFO] [stdout] 22f7d00ef89182a02b4b070a5401835bcc2b582cc4ae419827a70a6f46b27d74