[INFO] fetching crate seed_hooks 0.1.4...
[INFO] checking seed_hooks-0.1.4 against beta for pr-78714
[INFO] extracting crate seed_hooks 0.1.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate seed_hooks 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 seed_hooks 0.1.4
[INFO] finished tweaking crates.io crate seed_hooks 0.1.4
[INFO] tweaked toml for crates.io crate seed_hooks 0.1.4 written to /workspace/builds/worker-0/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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 3e0d8e0e6fce5261722afd6b528fc15ca4abe56c21fcadc1a9dcce82677224b5
[INFO] running `Command { std: "docker" "start" "-a" "3e0d8e0e6fce5261722afd6b528fc15ca4abe56c21fcadc1a9dcce82677224b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e0d8e0e6fce5261722afd6b528fc15ca4abe56c21fcadc1a9dcce82677224b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e0d8e0e6fce5261722afd6b528fc15ca4abe56c21fcadc1a9dcce82677224b5", kill_on_drop: false }`
[INFO] [stdout] 3e0d8e0e6fce5261722afd6b528fc15ca4abe56c21fcadc1a9dcce82677224b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 6f655af784b1d333ce539d3b11556c8076b1daaa87f82101781ac3049e8c725c
[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" "6f655af784b1d333ce539d3b11556c8076b1daaa87f82101781ac3049e8c725c", kill_on_drop: false }`
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]     Checking enclose v1.1.8
[INFO] [stderr]     Checking slotmap v0.4.0
[INFO] [stderr]    Compiling seed v0.7.0
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling dbg v1.0.4
[INFO] [stderr]    Compiling syn-mid v0.5.1
[INFO] [stderr]    Compiling topo-macro v0.9.0
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking wasm-bindgen v0.2.68
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking cookie v0.13.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.12
[INFO] [stderr]     Checking js-sys v0.3.45
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]    Compiling proc-macro-error v0.4.12
[INFO] [stderr]    Compiling illicit-macro v0.9.0
[INFO] [stderr]    Compiling illicit v0.9.2
[INFO] [stderr]     Checking topo v0.9.4
[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/topo-0.9.4/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(track_caller)]
[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 `topo`
[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" "6f655af784b1d333ce539d3b11556c8076b1daaa87f82101781ac3049e8c725c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f655af784b1d333ce539d3b11556c8076b1daaa87f82101781ac3049e8c725c", kill_on_drop: false }`
[INFO] [stdout] 6f655af784b1d333ce539d3b11556c8076b1daaa87f82101781ac3049e8c725c