[INFO] fetching crate futures-channel-preview 0.3.0-alpha.19...
[INFO] documenting futures-channel-preview-0.3.0-alpha.19 against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] extracting crate futures-channel-preview 0.3.0-alpha.19 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate futures-channel-preview 0.3.0-alpha.19 on toolchain 66dfc4e010913fbed0c4ea91fc2c010004b0f441
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-channel-preview 0.3.0-alpha.19
[INFO] finished tweaking crates.io crate futures-channel-preview 0.3.0-alpha.19
[INFO] tweaked toml for crates.io crate futures-channel-preview 0.3.0-alpha.19 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6d2933b9499ccf5d8847f7ec276f76d30a56e8c04f07a10d87546f7559d51563
[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" "6d2933b9499ccf5d8847f7ec276f76d30a56e8c04f07a10d87546f7559d51563", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d2933b9499ccf5d8847f7ec276f76d30a56e8c04f07a10d87546f7559d51563", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d2933b9499ccf5d8847f7ec276f76d30a56e8c04f07a10d87546f7559d51563", kill_on_drop: false }`
[INFO] [stdout] 6d2933b9499ccf5d8847f7ec276f76d30a56e8c04f07a10d87546f7559d51563
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f99c4e8c461d7ec9c41498e4b7132bbd8c3547de0f253292296b6e03a8a6ec3
[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" "5f99c4e8c461d7ec9c41498e4b7132bbd8c3547de0f253292296b6e03a8a6ec3", kill_on_drop: false }`
[INFO] [stderr]  Documenting futures-channel-preview v0.3.0-alpha.19 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `Command { std: "docker" "inspect" "5f99c4e8c461d7ec9c41498e4b7132bbd8c3547de0f253292296b6e03a8a6ec3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f99c4e8c461d7ec9c41498e4b7132bbd8c3547de0f253292296b6e03a8a6ec3", kill_on_drop: false }`
[INFO] [stdout] 5f99c4e8c461d7ec9c41498e4b7132bbd8c3547de0f253292296b6e03a8a6ec3