[INFO] fetching crate proc-macro2-next 1.0.0-rc4...
[INFO] checking proc-macro2-next-1.0.0-rc4 against master#c919f490bbcd2b29b74016101f7ec71aaa24bdbb for pr-79073
[INFO] extracting crate proc-macro2-next 1.0.0-rc4 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate proc-macro2-next 1.0.0-rc4 on toolchain c919f490bbcd2b29b74016101f7ec71aaa24bdbb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proc-macro2-next 1.0.0-rc4
[INFO] finished tweaking crates.io crate proc-macro2-next 1.0.0-rc4
[INFO] tweaked toml for crates.io crate proc-macro2-next 1.0.0-rc4 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 881f34de9ffdacf25d0f2b5706aa57b7c20c4b5dcedfd47c38983a3b745b08db
[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" "881f34de9ffdacf25d0f2b5706aa57b7c20c4b5dcedfd47c38983a3b745b08db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "881f34de9ffdacf25d0f2b5706aa57b7c20c4b5dcedfd47c38983a3b745b08db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "881f34de9ffdacf25d0f2b5706aa57b7c20c4b5dcedfd47c38983a3b745b08db", kill_on_drop: false }`
[INFO] [stdout] 881f34de9ffdacf25d0f2b5706aa57b7c20c4b5dcedfd47c38983a3b745b08db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 292faf772269f3a80c2b29fb666758dbca866a997f190b5a6969f592da90c9cb
[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" "292faf772269f3a80c2b29fb666758dbca866a997f190b5a6969f592da90c9cb", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]    Compiling proc-macro2-next v1.0.0-rc4
[INFO] [stderr]    Compiling proc-macro2-next v1.0.0-rc4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking quote-next v1.0.0-rc3
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.25s
[INFO] running `Command { std: "docker" "inspect" "292faf772269f3a80c2b29fb666758dbca866a997f190b5a6969f592da90c9cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "292faf772269f3a80c2b29fb666758dbca866a997f190b5a6969f592da90c9cb", kill_on_drop: false }`
[INFO] [stdout] 292faf772269f3a80c2b29fb666758dbca866a997f190b5a6969f592da90c9cb