[INFO] fetching crate eloggr 0.1.1...
[INFO] checking eloggr-0.1.1 against beta for pr-78714
[INFO] extracting crate eloggr 0.1.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate eloggr 0.1.1 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 eloggr 0.1.1
[INFO] finished tweaking crates.io crate eloggr 0.1.1
[INFO] tweaked toml for crates.io crate eloggr 0.1.1 written to /workspace/builds/worker-12/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 32920c0a17a6e4d2dd34589fd4f1f4adda4a970dc5cd1dec9ce82e1cb3ec88e6
[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" "32920c0a17a6e4d2dd34589fd4f1f4adda4a970dc5cd1dec9ce82e1cb3ec88e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32920c0a17a6e4d2dd34589fd4f1f4adda4a970dc5cd1dec9ce82e1cb3ec88e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32920c0a17a6e4d2dd34589fd4f1f4adda4a970dc5cd1dec9ce82e1cb3ec88e6", kill_on_drop: false }`
[INFO] [stdout] 32920c0a17a6e4d2dd34589fd4f1f4adda4a970dc5cd1dec9ce82e1cb3ec88e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 66d923bfbe144cb229493808987b80d1d0941fb2eeccfea5b6e989497f6d2bf8
[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" "66d923bfbe144cb229493808987b80d1d0941fb2eeccfea5b6e989497f6d2bf8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ptr v0.2.2
[INFO] [stderr]    Compiling hash-table v0.2.4
[INFO] [stderr]    Compiling containers v0.9.9
[INFO] [stderr]     Checking rel v0.2.0
[INFO] [stderr]    Compiling i-o v0.4.7
[INFO] [stderr]     Checking idem v0.4.0
[INFO] [stderr]     Checking heap v0.1.0
[INFO] [stderr]     Checking utf v0.1.5
[INFO] [stderr]     Checking libc-interface v0.1.1
[INFO] [stderr]     Checking flags v0.1.4
[INFO] [stderr]     Checking system-call v0.1.2
[INFO] [stderr]     Checking fallible v0.1.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]     Checking rand_pcg v0.1.2
[INFO] [stderr]     Checking rand_xorshift 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/system-call-0.1.2/src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(llvm_asm)]
[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]     Checking rand_chacha v0.1.1
[INFO] [stderr] error: could not compile `system-call`
[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" "66d923bfbe144cb229493808987b80d1d0941fb2eeccfea5b6e989497f6d2bf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66d923bfbe144cb229493808987b80d1d0941fb2eeccfea5b6e989497f6d2bf8", kill_on_drop: false }`
[INFO] [stdout] 66d923bfbe144cb229493808987b80d1d0941fb2eeccfea5b6e989497f6d2bf8