[INFO] fetching crate merkletree 0.21.0...
[INFO] checking merkletree-0.21.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate merkletree 0.21.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate merkletree 0.21.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/rust-toolchain
[INFO] started tweaking crates.io crate merkletree 0.21.0
[INFO] finished tweaking crates.io crate merkletree 0.21.0
[INFO] tweaked toml for crates.io crate merkletree 0.21.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded byteorder v0.5.3
[INFO] [stderr]   Downloaded positioned-io v0.2.2
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f1f463ec61c6f8807da270b172098c61e64e1a79603d1aa69b367540720a4885
[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" "f1f463ec61c6f8807da270b172098c61e64e1a79603d1aa69b367540720a4885", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1f463ec61c6f8807da270b172098c61e64e1a79603d1aa69b367540720a4885", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1f463ec61c6f8807da270b172098c61e64e1a79603d1aa69b367540720a4885", kill_on_drop: false }`
[INFO] [stdout] f1f463ec61c6f8807da270b172098c61e64e1a79603d1aa69b367540720a4885
[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" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 22efcf7b5b52bac3518015d1ab0dfffdf48a6902fa08fbba96118adb99117872
[INFO] running `Command { std: "docker" "start" "-a" "22efcf7b5b52bac3518015d1ab0dfffdf48a6902fa08fbba96118adb99117872", kill_on_drop: false }`
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking positioned-io v0.2.2
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.5
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking merkletree v0.21.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `path`
[INFO] [stdout]   --> src/store/mmap.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `store_size`
[INFO] [stdout]   --> src/store/mmap.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     store_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `path`
[INFO] [stdout]   --> src/store/mmap.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `store_size`
[INFO] [stdout]   --> src/store/mmap.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     store_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.89s
[INFO] running `Command { std: "docker" "inspect" "22efcf7b5b52bac3518015d1ab0dfffdf48a6902fa08fbba96118adb99117872", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22efcf7b5b52bac3518015d1ab0dfffdf48a6902fa08fbba96118adb99117872", kill_on_drop: false }`
[INFO] [stdout] 22efcf7b5b52bac3518015d1ab0dfffdf48a6902fa08fbba96118adb99117872