[INFO] fetching crate ffi-support 0.4.2...
[INFO] checking ffi-support-0.4.2 against beta for pr-78714
[INFO] extracting crate ffi-support 0.4.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ffi-support 0.4.2 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 ffi-support 0.4.2
[INFO] finished tweaking crates.io crate ffi-support 0.4.2
[INFO] tweaked toml for crates.io crate ffi-support 0.4.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b4da17ec858b98e54a64be61d7fedbc7353a2f518c845ee0a8a20924f1ac809
[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" "8b4da17ec858b98e54a64be61d7fedbc7353a2f518c845ee0a8a20924f1ac809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b4da17ec858b98e54a64be61d7fedbc7353a2f518c845ee0a8a20924f1ac809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b4da17ec858b98e54a64be61d7fedbc7353a2f518c845ee0a8a20924f1ac809", kill_on_drop: false }`
[INFO] [stdout] 8b4da17ec858b98e54a64be61d7fedbc7353a2f518c845ee0a8a20924f1ac809
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 734d85c5f07fc1b7927e59a935afdbc7f9120d3baa93732af1e8b0b6b20f4d3d
[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" "734d85c5f07fc1b7927e59a935afdbc7f9120d3baa93732af1e8b0b6b20f4d3d", kill_on_drop: false }`
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking ffi-support v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `Command { std: "docker" "inspect" "734d85c5f07fc1b7927e59a935afdbc7f9120d3baa93732af1e8b0b6b20f4d3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "734d85c5f07fc1b7927e59a935afdbc7f9120d3baa93732af1e8b0b6b20f4d3d", kill_on_drop: false }`
[INFO] [stdout] 734d85c5f07fc1b7927e59a935afdbc7f9120d3baa93732af1e8b0b6b20f4d3d