[INFO] fetching crate varlink_parser 4.0.4...
[INFO] checking varlink_parser-4.0.4 against beta for pr-78714
[INFO] extracting crate varlink_parser 4.0.4 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate varlink_parser 4.0.4 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 varlink_parser 4.0.4
[INFO] finished tweaking crates.io crate varlink_parser 4.0.4
[INFO] tweaked toml for crates.io crate varlink_parser 4.0.4 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate varlink_parser 4.0.4 already has a lockfile, it will not be regenerated
[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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 13811e4b85a22f5ad7fc93946190d926c35938ece63d826bc171a5e434456605
[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" "13811e4b85a22f5ad7fc93946190d926c35938ece63d826bc171a5e434456605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13811e4b85a22f5ad7fc93946190d926c35938ece63d826bc171a5e434456605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13811e4b85a22f5ad7fc93946190d926c35938ece63d826bc171a5e434456605", kill_on_drop: false }`
[INFO] [stdout] 13811e4b85a22f5ad7fc93946190d926c35938ece63d826bc171a5e434456605
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a6a2309d525142bbcfab9c7143234e0cbfbb8a60ee25d39e9a30d55a89d841d5
[INFO] running `Command { std: "docker" "start" "-a" "a6a2309d525142bbcfab9c7143234e0cbfbb8a60ee25d39e9a30d55a89d841d5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling peg-runtime v0.6.2
[INFO] [stderr]    Compiling varlink_parser v4.0.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking chainerror v0.4.3
[INFO] [stderr]    Compiling peg-macros v0.6.2
[INFO] [stderr]     Checking peg v0.6.2
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.06s
[INFO] running `Command { std: "docker" "inspect" "a6a2309d525142bbcfab9c7143234e0cbfbb8a60ee25d39e9a30d55a89d841d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6a2309d525142bbcfab9c7143234e0cbfbb8a60ee25d39e9a30d55a89d841d5", kill_on_drop: false }`
[INFO] [stdout] a6a2309d525142bbcfab9c7143234e0cbfbb8a60ee25d39e9a30d55a89d841d5