[INFO] fetching crate gs-rust-cache 0.1.4...
[INFO] checking gs-rust-cache-0.1.4 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate gs-rust-cache 0.1.4 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate gs-rust-cache 0.1.4
[INFO] finished tweaking crates.io crate gs-rust-cache 0.1.4
[INFO] tweaked toml for crates.io crate gs-rust-cache 0.1.4 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate gs-rust-cache 0.1.4 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] crate crates.io crate gs-rust-cache 0.1.4 already has a lockfile, it will not be regenerated
[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] fed1ddb6b71e7a00fbd4adf6e810f652bd3ea55638e53c3add159cea0e1e1289
[INFO] running `Command { std: "docker" "start" "-a" "fed1ddb6b71e7a00fbd4adf6e810f652bd3ea55638e53c3add159cea0e1e1289", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fed1ddb6b71e7a00fbd4adf6e810f652bd3ea55638e53c3add159cea0e1e1289", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fed1ddb6b71e7a00fbd4adf6e810f652bd3ea55638e53c3add159cea0e1e1289", kill_on_drop: false }`
[INFO] [stdout] fed1ddb6b71e7a00fbd4adf6e810f652bd3ea55638e53c3add159cea0e1e1289
[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] 2bc01dfb5d1a2ec955d6da50e1f44ca0630c532179e7955f31c5d1e9c0d746ea
[INFO] running `Command { std: "docker" "start" "-a" "2bc01dfb5d1a2ec955d6da50e1f44ca0630c532179e7955f31c5d1e9c0d746ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.5
[INFO] [stderr]    Compiling indexmap v2.10.0
[INFO] [stderr]     Checking hashbrown v0.15.4
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling rstest_macros v0.24.0
[INFO] [stderr]     Checking lru v0.12.5
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]     Checking gs-rust-cache v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling toml_edit v0.22.27
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling proc-macro-crate v3.3.0
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking rstest v0.24.0
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:617:51
[INFO] [stdout]     |
[INFO] [stdout] 617 |         let handles: Vec<_> = (0..n_threads).map(|i| {
[INFO] [stdout]     |                                                   ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/lib.rs:687:32
[INFO] [stdout]     |
[INFO] [stdout] 687 |         assert!(cache.len() == n_threads.try_into().unwrap());
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `gs-rust-cache` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "2bc01dfb5d1a2ec955d6da50e1f44ca0630c532179e7955f31c5d1e9c0d746ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bc01dfb5d1a2ec955d6da50e1f44ca0630c532179e7955f31c5d1e9c0d746ea", kill_on_drop: false }`
[INFO] [stdout] 2bc01dfb5d1a2ec955d6da50e1f44ca0630c532179e7955f31c5d1e9c0d746ea