[INFO] fetching crate synchronicity 0.0.1...
[INFO] checking synchronicity-0.0.1 against try#d990716b6a1fdde1300748828a9c9e79dfd0b898 for pr-74846
[INFO] extracting crate synchronicity 0.0.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate synchronicity 0.0.1 on toolchain d990716b6a1fdde1300748828a9c9e79dfd0b898
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate synchronicity 0.0.1
[INFO] finished tweaking crates.io crate synchronicity 0.0.1
[INFO] tweaked toml for crates.io crate synchronicity 0.0.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate synchronicity 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded secrecy v0.4.1
[INFO] [stderr]   Downloaded abscissa_derive v0.4.0
[INFO] [stderr]   Downloaded abscissa_core v0.4.0
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f0ad502ca134e184b614eb6bb0bca509556bdf73f7648721e97b2ec3d7db1b5
[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" "2f0ad502ca134e184b614eb6bb0bca509556bdf73f7648721e97b2ec3d7db1b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f0ad502ca134e184b614eb6bb0bca509556bdf73f7648721e97b2ec3d7db1b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f0ad502ca134e184b614eb6bb0bca509556bdf73f7648721e97b2ec3d7db1b5", kill_on_drop: false }`
[INFO] [stdout] 2f0ad502ca134e184b614eb6bb0bca509556bdf73f7648721e97b2ec3d7db1b5
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "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] 8819aa7b2d3382fe309aa35fc7ea1617a0c8b30904989154da9598aa47f52240
[INFO] running `Command { std: "docker" "start" "-a" "8819aa7b2d3382fe309aa35fc7ea1617a0c8b30904989154da9598aa47f52240", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling serde v1.0.103
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling strsim v0.9.2
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking zeroize v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking generational-arena v0.2.6
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking signal-hook v0.1.12
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.103
[INFO] [stderr]    Compiling gumdrop_derive v0.7.0
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]     Checking gumdrop v0.7.0
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling abscissa_derive v0.4.0
[INFO] [stderr]     Checking toml v0.5.5
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking secrecy v0.4.1
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]     Checking abscissa_core v0.4.0
[INFO] [stderr]     Checking synchronicity v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 15s
[INFO] running `Command { std: "docker" "inspect" "8819aa7b2d3382fe309aa35fc7ea1617a0c8b30904989154da9598aa47f52240", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8819aa7b2d3382fe309aa35fc7ea1617a0c8b30904989154da9598aa47f52240", kill_on_drop: false }`
[INFO] [stdout] 8819aa7b2d3382fe309aa35fc7ea1617a0c8b30904989154da9598aa47f52240