[INFO] fetching crate treebitmap 0.4.0...
[INFO] checking treebitmap-0.4.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate treebitmap 0.4.0 into /workspace/builds/worker-22/source
[INFO] validating manifest of crates.io crate treebitmap 0.4.0 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] started tweaking crates.io crate treebitmap 0.4.0
[INFO] finished tweaking crates.io crate treebitmap 0.4.0
[INFO] tweaked toml for crates.io crate treebitmap 0.4.0 written to /workspace/builds/worker-22/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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] fd0d8745df47fa48696355acf75e8538170a0b55eed5be748a3cf87473076059
[INFO] running `Command { std: "docker" "start" "-a" "fd0d8745df47fa48696355acf75e8538170a0b55eed5be748a3cf87473076059", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd0d8745df47fa48696355acf75e8538170a0b55eed5be748a3cf87473076059", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd0d8745df47fa48696355acf75e8538170a0b55eed5be748a3cf87473076059", kill_on_drop: false }`
[INFO] [stdout] fd0d8745df47fa48696355acf75e8538170a0b55eed5be748a3cf87473076059
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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] [stdout] dd6fdc781d47031b69df188f673734f63c90c6f9649666462a99e9a571cfdbd7
[INFO] running `Command { std: "docker" "start" "-a" "dd6fdc781d47031b69df188f673734f63c90c6f9649666462a99e9a571cfdbd7", kill_on_drop: false }`
[INFO] [stderr]     Checking treebitmap v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree_bitmap/allocator.rs:458:17
[INFO] [stdout]     |
[INFO] [stdout] 458 |             let mut x = bucket.get_slot_entry_mut(slot, i);
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree_bitmap/allocator.rs:545:17
[INFO] [stdout]     |
[INFO] [stdout] 545 |             let mut x = alloc.get_mut(&hdl, i);
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "dd6fdc781d47031b69df188f673734f63c90c6f9649666462a99e9a571cfdbd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd6fdc781d47031b69df188f673734f63c90c6f9649666462a99e9a571cfdbd7", kill_on_drop: false }`
[INFO] [stdout] dd6fdc781d47031b69df188f673734f63c90c6f9649666462a99e9a571cfdbd7