[INFO] updating cached repository https://github.com/hermitcore/rusty-loader
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] [stderr] From https://github.com/hermitcore/rusty-loader
[INFO] [stderr]    8d6047a..23e217d  master     -> master
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23e217d925ef57892792fb384d49596485c5e6df
[INFO] documenting hermitcore/rusty-loader against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhermitcore%2Frusty-loader" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hermitcore/rusty-loader on toolchain 66dfc4e010913fbed0c4ea91fc2c010004b0f441
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3/source/.cargo/config
[INFO] started tweaking git repo https://github.com/hermitcore/rusty-loader
[INFO] finished tweaking git repo https://github.com/hermitcore/rusty-loader
[INFO] tweaked toml for git repo https://github.com/hermitcore/rusty-loader written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/hermitcore/rusty-loader already has a lockfile, it will not be regenerated
[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-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" "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] 484eb52bb6ee1f1f0b49ccd396887ce6b41e30df957ad699189ff0a64b09c0a3
[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" "484eb52bb6ee1f1f0b49ccd396887ce6b41e30df957ad699189ff0a64b09c0a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "484eb52bb6ee1f1f0b49ccd396887ce6b41e30df957ad699189ff0a64b09c0a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "484eb52bb6ee1f1f0b49ccd396887ce6b41e30df957ad699189ff0a64b09c0a3", kill_on_drop: false }`
[INFO] [stdout] 484eb52bb6ee1f1f0b49ccd396887ce6b41e30df957ad699189ff0a64b09c0a3
[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" "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] 4da7dd43a3699d2a442622d7e092d43a91936cf4b34f21ccbbe0f344c7c50a58
[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" "4da7dd43a3699d2a442622d7e092d43a91936cf4b34f21ccbbe0f344c7c50a58", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling x86 v0.34.0
[INFO] [stderr]     Checking bit_field v0.10.0
[INFO] [stderr]    Compiling rusty-loader v0.2.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking multiboot v0.3.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling raw-cpuid v8.1.0
[INFO] [stderr]  Documenting rusty-loader v0.2.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(specialization)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 23.28s
[INFO] running `Command { std: "docker" "inspect" "4da7dd43a3699d2a442622d7e092d43a91936cf4b34f21ccbbe0f344c7c50a58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4da7dd43a3699d2a442622d7e092d43a91936cf4b34f21ccbbe0f344c7c50a58", kill_on_drop: false }`
[INFO] [stdout] 4da7dd43a3699d2a442622d7e092d43a91936cf4b34f21ccbbe0f344c7c50a58