[INFO] fetching crate lark-test-generate 0.1.0...
[INFO] checking lark-test-generate-0.1.0 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate lark-test-generate 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate lark-test-generate 0.1.0 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lark-test-generate 0.1.0
[INFO] finished tweaking crates.io crate lark-test-generate 0.1.0
[INFO] tweaked toml for crates.io crate lark-test-generate 0.1.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "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" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d4738ea073de271d64d64cb03abecca4c02d9605698667e81efaa57974252e04
[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" "d4738ea073de271d64d64cb03abecca4c02d9605698667e81efaa57974252e04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4738ea073de271d64d64cb03abecca4c02d9605698667e81efaa57974252e04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4738ea073de271d64d64cb03abecca4c02d9605698667e81efaa57974252e04", kill_on_drop: false }`
[INFO] [stdout] d4738ea073de271d64d64cb03abecca4c02d9605698667e81efaa57974252e04
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b93423fd6f92b849a23662de33148b03ce11b5cc525d0b177e5356bbc57b9b59
[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" "b93423fd6f92b849a23662de33148b03ce11b5cc525d0b177e5356bbc57b9b59", kill_on_drop: false }`
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking datafrog v2.0.1
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking cc v1.0.68
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking generational-arena v0.2.8
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]    Compiling derive-new v0.5.9
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling lark-debug-derive v0.1.0
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking unicode-bidi v0.3.5
[INFO] [stderr]     Checking tinyvec v1.2.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking tempfile v2.2.0
[INFO] [stderr]     Checking render-tree v0.1.1
[INFO] [stderr]     Checking lark-debug-with v0.1.0
[INFO] [stderr]     Checking lark-collections v0.1.0
[INFO] [stderr]     Checking lark-unify v0.1.0
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lark-unify-0.1.0/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn)]
[INFO] [stdout]   |            ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking flexi_logger v0.10.7
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lark-unify`
[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" "b93423fd6f92b849a23662de33148b03ce11b5cc525d0b177e5356bbc57b9b59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b93423fd6f92b849a23662de33148b03ce11b5cc525d0b177e5356bbc57b9b59", kill_on_drop: false }`
[INFO] [stdout] b93423fd6f92b849a23662de33148b03ce11b5cc525d0b177e5356bbc57b9b59