[INFO] fetching crate once_cell 1.21.3...
[INFO] checking once_cell-1.21.3 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate once_cell 1.21.3 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate once_cell 1.21.3
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate once_cell 1.21.3
[INFO] tweaked toml for crates.io crate once_cell 1.21.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate once_cell 1.21.3 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 once_cell 1.21.3 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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 5abb176e1e6b72288c0afbe9ed53cb7a371eddd79078b1aa141c1899605b760b
[INFO] running `Command { std: "docker" "start" "-a" "5abb176e1e6b72288c0afbe9ed53cb7a371eddd79078b1aa141c1899605b760b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5abb176e1e6b72288c0afbe9ed53cb7a371eddd79078b1aa141c1899605b760b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5abb176e1e6b72288c0afbe9ed53cb7a371eddd79078b1aa141c1899605b760b", kill_on_drop: false }`
[INFO] [stdout] 5abb176e1e6b72288c0afbe9ed53cb7a371eddd79078b1aa141c1899605b760b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] c9ac3e73c3bea028928d8f142e7db154f118a21639ac8ec2928838e096bec0c2
[INFO] running `Command { std: "docker" "start" "-a" "c9ac3e73c3bea028928d8f142e7db154f118a21639ac8ec2928838e096bec0c2", kill_on_drop: false }`
[INFO] [stderr]     Checking regex-syntax v0.8.4
[INFO] [stderr]     Checking critical-section v1.1.3
[INFO] [stderr]     Checking once_cell v1.21.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<&T, unsync::OnceCell<T>::get_or_init::Void>
[INFO] [stdout]    --> src/lib.rs:591:19
[INFO] [stdout]     |
[INFO] [stdout] 591 |             match self.get_or_try_init(|| Ok::<T, Void>(f())) {
[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<&T, sync::OnceCell<T>::get_or_init::Void>
[INFO] [stdout]     --> src/lib.rs:1120:19
[INFO] [stdout]      |
[INFO] [stdout] 1120 |             match self.get_or_try_init(|| Ok::<T, Void>(f())) {
[INFO] [stdout]      |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NonZero<usize>, OnceNonZeroUsize::get_or_init::Void>
[INFO] [stdout]    --> src/race.rs:125:15
[INFO] [stdout]     |
[INFO] [stdout] 125 |         match self.get_or_try_init(|| Ok::<NonZeroUsize, Void>(f())) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<NonZero<usize>, OnceNonZeroUsize::get_or_init::Void>
[INFO] [stdout]    --> src/race.rs:125:39
[INFO] [stdout]     |
[INFO] [stdout] 125 |         match self.get_or_try_init(|| Ok::<NonZeroUsize, Void>(f())) {
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&T, OnceRef<'a, T>::get_or_init::Void>
[INFO] [stdout]    --> src/race.rs:286:15
[INFO] [stdout]     |
[INFO] [stdout] 286 |         match self.get_or_try_init(|| Ok::<&'a T, Void>(f())) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&T, OnceRef<'a, T>::get_or_init::Void>
[INFO] [stdout]    --> src/race.rs:286:39
[INFO] [stdout]     |
[INFO] [stdout] 286 |         match self.get_or_try_init(|| Ok::<&'a T, Void>(f())) {
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&T, OnceBox<T>::get_or_init::Void>
[INFO] [stdout]    --> src/race.rs:437:19
[INFO] [stdout]     |
[INFO] [stdout] 437 |             match self.get_or_try_init(|| Ok::<Box<T>, Void>(f())) {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Box<T>, OnceBox<T>::get_or_init::Void>
[INFO] [stdout]    --> src/race.rs:437:43
[INFO] [stdout]     |
[INFO] [stdout] 437 |             match self.get_or_try_init(|| Ok::<Box<T>, Void>(f())) {
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `once_cell` (lib) due to 8 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c9ac3e73c3bea028928d8f142e7db154f118a21639ac8ec2928838e096bec0c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9ac3e73c3bea028928d8f142e7db154f118a21639ac8ec2928838e096bec0c2", kill_on_drop: false }`
[INFO] [stdout] c9ac3e73c3bea028928d8f142e7db154f118a21639ac8ec2928838e096bec0c2