[INFO] fetching crate fstrings-proc-macro 0.2.4-rc2...
[INFO] documenting fstrings-proc-macro-0.2.4-rc2 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate fstrings-proc-macro 0.2.4-rc2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate fstrings-proc-macro 0.2.4-rc2 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fstrings-proc-macro 0.2.4-rc2
[INFO] finished tweaking crates.io crate fstrings-proc-macro 0.2.4-rc2
[INFO] tweaked toml for crates.io crate fstrings-proc-macro 0.2.4-rc2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] 57212a7113feca66e8596bc5b14a0a1483904a7108aa7c79f921aee7d373f0b5
[INFO] running `Command { std: "docker" "start" "-a" "57212a7113feca66e8596bc5b14a0a1483904a7108aa7c79f921aee7d373f0b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57212a7113feca66e8596bc5b14a0a1483904a7108aa7c79f921aee7d373f0b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57212a7113feca66e8596bc5b14a0a1483904a7108aa7c79f921aee7d373f0b5", kill_on_drop: false }`
[INFO] [stdout] 57212a7113feca66e8596bc5b14a0a1483904a7108aa7c79f921aee7d373f0b5
[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" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 136bccebb60cac2e72592c67c5dbb3dc92ec1e9923d35dd7c3a1c3e1639a9166
[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" "136bccebb60cac2e72592c67c5dbb3dc92ec1e9923d35dd7c3a1c3e1639a9166", kill_on_drop: false }`
[INFO] [stderr]     Checking syn v1.0.74
[INFO] [stderr]  Documenting fstrings-proc-macro v0.2.4-rc2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.36s
[INFO] running `Command { std: "docker" "inspect" "136bccebb60cac2e72592c67c5dbb3dc92ec1e9923d35dd7c3a1c3e1639a9166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "136bccebb60cac2e72592c67c5dbb3dc92ec1e9923d35dd7c3a1c3e1639a9166", kill_on_drop: false }`
[INFO] [stdout] 136bccebb60cac2e72592c67c5dbb3dc92ec1e9923d35dd7c3a1c3e1639a9166
