[INFO] crate rats 0.0.1 is already in cache
[INFO] documenting rats-0.0.1 against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] extracting crate rats 0.0.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate rats 0.0.1 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 rats 0.0.1
[INFO] finished tweaking crates.io crate rats 0.0.1
[INFO] tweaked toml for crates.io crate rats 0.0.1 written to /workspace/builds/worker-7/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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 27cf08b5ce9d158c14c1e41d245460e02a4d36ba5fb1f6a404bd0708cdf19c60
[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" "27cf08b5ce9d158c14c1e41d245460e02a4d36ba5fb1f6a404bd0708cdf19c60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27cf08b5ce9d158c14c1e41d245460e02a4d36ba5fb1f6a404bd0708cdf19c60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27cf08b5ce9d158c14c1e41d245460e02a4d36ba5fb1f6a404bd0708cdf19c60", kill_on_drop: false }`
[INFO] [stdout] 27cf08b5ce9d158c14c1e41d245460e02a4d36ba5fb1f6a404bd0708cdf19c60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] eba7a3d665eed69fd165deb0077a7be8613cd4db713ef1fa8b138cfde9a1dcee
[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" "eba7a3d665eed69fd165deb0077a7be8613cd4db713ef1fa8b138cfde9a1dcee", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking futures-core-preview v0.2.3
[INFO] [stderr]     Checking futures-channel-preview v0.2.2
[INFO] [stderr]     Checking futures-io-preview v0.2.2
[INFO] [stderr]     Checking futures-sink-preview v0.2.2
[INFO] [stderr]     Checking futures-util-preview v0.2.2
[INFO] [stderr]     Checking futures-executor-preview v0.2.2
[INFO] [stderr]     Checking futures-stable-preview v0.2.3
[INFO] [stderr]     Checking futures-async-runtime-preview v0.2.3
[INFO] [stderr]     Checking futures-preview v0.2.2
[INFO] [stderr]  Documenting rats v0.0.1 (/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:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![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 [unoptimized + debuginfo] target(s) in 5.76s
[INFO] running `Command { std: "docker" "inspect" "eba7a3d665eed69fd165deb0077a7be8613cd4db713ef1fa8b138cfde9a1dcee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eba7a3d665eed69fd165deb0077a7be8613cd4db713ef1fa8b138cfde9a1dcee", kill_on_drop: false }`
[INFO] [stdout] eba7a3d665eed69fd165deb0077a7be8613cd4db713ef1fa8b138cfde9a1dcee