[INFO] fetching crate percy 0.0.1...
[INFO] checking percy-0.0.1 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate percy 0.0.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate percy 0.0.1 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate percy 0.0.1
[INFO] finished tweaking crates.io crate percy 0.0.1
[INFO] tweaked toml for crates.io crate percy 0.0.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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] 73dba2923b956bc1584b7829785fde56b48673f964797d4bd5def5dbbd651f01
[INFO] running `Command { std: "docker" "start" "-a" "73dba2923b956bc1584b7829785fde56b48673f964797d4bd5def5dbbd651f01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73dba2923b956bc1584b7829785fde56b48673f964797d4bd5def5dbbd651f01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73dba2923b956bc1584b7829785fde56b48673f964797d4bd5def5dbbd651f01", kill_on_drop: false }`
[INFO] [stdout] 73dba2923b956bc1584b7829785fde56b48673f964797d4bd5def5dbbd651f01
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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] b872bf2227f632b73eba80974883572dcb35bc10b5a32ac500d90d8b6e21b263
[INFO] running `Command { std: "docker" "start" "-a" "b872bf2227f632b73eba80974883572dcb35bc10b5a32ac500d90d8b6e21b263", kill_on_drop: false }`
[INFO] [stderr]     Checking percy v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "b872bf2227f632b73eba80974883572dcb35bc10b5a32ac500d90d8b6e21b263", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b872bf2227f632b73eba80974883572dcb35bc10b5a32ac500d90d8b6e21b263", kill_on_drop: false }`
[INFO] [stdout] b872bf2227f632b73eba80974883572dcb35bc10b5a32ac500d90d8b6e21b263