[INFO] fetching crate crc32c 0.4.0...
[INFO] documenting crc32c-0.4.0 against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] extracting crate crc32c 0.4.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate crc32c 0.4.0 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 crc32c 0.4.0
[INFO] finished tweaking crates.io crate crc32c 0.4.0
[INFO] tweaked toml for crates.io crate crc32c 0.4.0 written to /workspace/builds/worker-4/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-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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6cbdc2e8e7aa36e15847f42ae9df99666d10c86964e46723b3e4bd86337430de
[INFO] running `Command { std: "docker" "start" "-a" "6cbdc2e8e7aa36e15847f42ae9df99666d10c86964e46723b3e4bd86337430de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cbdc2e8e7aa36e15847f42ae9df99666d10c86964e46723b3e4bd86337430de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cbdc2e8e7aa36e15847f42ae9df99666d10c86964e46723b3e4bd86337430de", kill_on_drop: false }`
[INFO] [stdout] 6cbdc2e8e7aa36e15847f42ae9df99666d10c86964e46723b3e4bd86337430de
[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" "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] 6eabfeb238ad8875553ee5607a0e12b7f9f05c0140ba5f9107d6a079f6cc10fb
[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" "6eabfeb238ad8875553ee5607a0e12b7f9f05c0140ba5f9107d6a079f6cc10fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc32c v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `mem` is imported redundantly
[INFO] [stdout]  --> build.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{mem, ops};
[INFO] [stdout]   |           --- the item `mem` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 8 |     use std::mem;
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]   --> build.rs:10:47
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut table: [[u32; 256]; 8] = unsafe { mem::uninitialized() };
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> build.rs:133:48
[INFO] [stdout]     |
[INFO] [stdout] 133 |     let mut zeroes: [[u32; 256]; 4] = unsafe { mem::uninitialized() };
[INFO] [stdout]     |                                                ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]   --> build.rs:46:18
[INFO] [stdout]    |
[INFO] [stdout] 46 |         unsafe { mem::uninitialized() }
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]  Documenting crc32c v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `Command { std: "docker" "inspect" "6eabfeb238ad8875553ee5607a0e12b7f9f05c0140ba5f9107d6a079f6cc10fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6eabfeb238ad8875553ee5607a0e12b7f9f05c0140ba5f9107d6a079f6cc10fb", kill_on_drop: false }`
[INFO] [stdout] 6eabfeb238ad8875553ee5607a0e12b7f9f05c0140ba5f9107d6a079f6cc10fb