[INFO] fetching crate concurrent_lru 0.2.0...
[INFO] checking concurrent_lru-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate concurrent_lru 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate concurrent_lru 0.2.0
[INFO] finished tweaking crates.io crate concurrent_lru 0.2.0
[INFO] tweaked toml for crates.io crate concurrent_lru 0.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate concurrent_lru 0.2.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 15 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0b60738e63a2d016aad31b8bdeb9a98f56b938a05c362e413785d8cc4477b40
[INFO] running `Command { std: "docker" "start" "-a" "d0b60738e63a2d016aad31b8bdeb9a98f56b938a05c362e413785d8cc4477b40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0b60738e63a2d016aad31b8bdeb9a98f56b938a05c362e413785d8cc4477b40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0b60738e63a2d016aad31b8bdeb9a98f56b938a05c362e413785d8cc4477b40", kill_on_drop: false }`
[INFO] [stdout] d0b60738e63a2d016aad31b8bdeb9a98f56b938a05c362e413785d8cc4477b40
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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 -Dunmustuse_in_always_ok" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97fa77e895d91bd745cb5bd51659e9733a9d65f0b2b52edf3ad2947ec0018e3f
[INFO] running `Command { std: "docker" "start" "-a" "97fa77e895d91bd745cb5bd51659e9733a9d65f0b2b52edf3ad2947ec0018e3f", kill_on_drop: false }`
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking concurrent_lru v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/unsharded.rs:209:13
[INFO] [stdout]     |
[INFO] [stdout] 209 |             Box::from_raw(self.0 as *mut Node<K, V>);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 209 |             let _ = Box::from_raw(self.0 as *mut Node<K, V>);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `concurrent_lru` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stdout] error: this type will no longer be must used: Result<unsharded::CacheHandle<'_, K, V>, Never>
[INFO] [stdout]    --> src/unsharded.rs:457:15
[INFO] [stdout]     |
[INFO] [stdout] 457 |         match self.get_or_try_init(key, charge, |k| Ok::<_, Never>(init(k))) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "97fa77e895d91bd745cb5bd51659e9733a9d65f0b2b52edf3ad2947ec0018e3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97fa77e895d91bd745cb5bd51659e9733a9d65f0b2b52edf3ad2947ec0018e3f", kill_on_drop: false }`
[INFO] [stdout] 97fa77e895d91bd745cb5bd51659e9733a9d65f0b2b52edf3ad2947ec0018e3f