[INFO] fetching crate async_cache 0.4.0...
[INFO] checking async_cache-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate async_cache 0.4.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate async_cache 0.4.0
[INFO] finished tweaking crates.io crate async_cache 0.4.0
[INFO] tweaked toml for crates.io crate async_cache 0.4.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate async_cache 0.4.0 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] crate crates.io crate async_cache 0.4.0 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 8da3c871149aed810e9e40271bfd7db365a6caa9c11dc44a5625ff5f5b68fd67
[INFO] running `Command { std: "docker" "start" "-a" "8da3c871149aed810e9e40271bfd7db365a6caa9c11dc44a5625ff5f5b68fd67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8da3c871149aed810e9e40271bfd7db365a6caa9c11dc44a5625ff5f5b68fd67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8da3c871149aed810e9e40271bfd7db365a6caa9c11dc44a5625ff5f5b68fd67", kill_on_drop: false }`
[INFO] [stdout] 8da3c871149aed810e9e40271bfd7db365a6caa9c11dc44a5625ff5f5b68fd67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 23d8854ef08f334800c64447772831f0e56f1c58b5fea2b25cd689b8d1a5882c
[INFO] running `Command { std: "docker" "start" "-a" "23d8854ef08f334800c64447772831f0e56f1c58b5fea2b25cd689b8d1a5882c", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]     Checking smallvec v1.15.1
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]     Checking futures-sink v0.3.31
[INFO] [stderr]    Compiling zerocopy v0.8.26
[INFO] [stderr]     Checking futures-io v0.3.31
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]     Checking getrandom v0.3.3
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]     Checking simdutf8 v0.1.5
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]     Checking parking_lot_core v0.9.11
[INFO] [stderr]     Checking parking_lot v0.12.4
[INFO] [stderr]     Checking faststr v0.2.32
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]     Checking dashmap v6.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling thiserror-impl v2.0.16
[INFO] [stderr]     Checking tokio v1.47.1
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking pin-project v1.1.10
[INFO] [stderr]     Checking thiserror v2.0.16
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking async_singleflight v0.6.1
[INFO] [stderr]     Checking async_cache v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/lib.rs:424:73
[INFO] [stdout]     |
[INFO] [stdout] 424 |           async fn fetch(&self, _: FastStr) -> Result<usize, Self::Error> {
[INFO] [stdout]     |  _________________________________________________________________________^
[INFO] [stdout] 425 | |             println!("fetching...");
[INFO] [stdout] 426 | |             self.0.fetch_add(1, Ordering::Relaxed);
[INFO] [stdout] 427 | |             Ok(1)
[INFO] [stdout] 428 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/lib.rs:424:73
[INFO] [stdout]     |
[INFO] [stdout] 424 |           async fn fetch(&self, _: FastStr) -> Result<usize, Self::Error> {
[INFO] [stdout]     |  _________________________________________________________________________^
[INFO] [stdout] 425 | |             println!("fetching...");
[INFO] [stdout] 426 | |             self.0.fetch_add(1, Ordering::Relaxed);
[INFO] [stdout] 427 | |             Ok(1)
[INFO] [stdout] 428 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/lib.rs:427:13
[INFO] [stdout]     |
[INFO] [stdout] 427 |             Ok(1)
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `async_cache` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "23d8854ef08f334800c64447772831f0e56f1c58b5fea2b25cd689b8d1a5882c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23d8854ef08f334800c64447772831f0e56f1c58b5fea2b25cd689b8d1a5882c", kill_on_drop: false }`
[INFO] [stdout] 23d8854ef08f334800c64447772831f0e56f1c58b5fea2b25cd689b8d1a5882c