[INFO] fetching crate proc_macro_helper 0.3.0...
[INFO] checking proc_macro_helper-0.3.0 against master#0dce3f606e05cffab7361c132a399d3550ab0df8 for pr-78376
[INFO] extracting crate proc_macro_helper 0.3.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate proc_macro_helper 0.3.0 on toolchain 0dce3f606e05cffab7361c132a399d3550ab0df8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proc_macro_helper 0.3.0
[INFO] finished tweaking crates.io crate proc_macro_helper 0.3.0
[INFO] tweaked toml for crates.io crate proc_macro_helper 0.3.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d10db6f9d52b78c510156a9c67e39805e7fcf7c6fd1e26d87f455da2692d21b4
[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" "d10db6f9d52b78c510156a9c67e39805e7fcf7c6fd1e26d87f455da2692d21b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d10db6f9d52b78c510156a9c67e39805e7fcf7c6fd1e26d87f455da2692d21b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d10db6f9d52b78c510156a9c67e39805e7fcf7c6fd1e26d87f455da2692d21b4", kill_on_drop: false }`
[INFO] [stdout] d10db6f9d52b78c510156a9c67e39805e7fcf7c6fd1e26d87f455da2692d21b4
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0dce3f606e05cffab7361c132a399d3550ab0df8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14c55a23e260739478f791eb59efaffa9637acec3360c3fe3c128d869d24e9d1
[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" "14c55a23e260739478f791eb59efaffa9637acec3360c3fe3c128d869d24e9d1", kill_on_drop: false }`
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]     Checking proc_macro_helper v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.66s
[INFO] running `Command { std: "docker" "inspect" "14c55a23e260739478f791eb59efaffa9637acec3360c3fe3c128d869d24e9d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14c55a23e260739478f791eb59efaffa9637acec3360c3fe3c128d869d24e9d1", kill_on_drop: false }`
[INFO] [stdout] 14c55a23e260739478f791eb59efaffa9637acec3360c3fe3c128d869d24e9d1