[INFO] fetching crate spmc_buffer 0.5.2...
[INFO] testing spmc_buffer-0.5.2 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate spmc_buffer 0.5.2 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate spmc_buffer 0.5.2
[INFO] finished tweaking crates.io crate spmc_buffer 0.5.2
[INFO] tweaked toml for crates.io crate spmc_buffer 0.5.2 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate spmc_buffer 0.5.2 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate spmc_buffer 0.5.2 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e29e5becd73fdd58b7be6373f4b3704514f9b49e5f5f05973c0bd47dd6395b8
[INFO] running `Command { std: "docker" "start" "-a" "9e29e5becd73fdd58b7be6373f4b3704514f9b49e5f5f05973c0bd47dd6395b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e29e5becd73fdd58b7be6373f4b3704514f9b49e5f5f05973c0bd47dd6395b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e29e5becd73fdd58b7be6373f4b3704514f9b49e5f5f05973c0bd47dd6395b8", kill_on_drop: false }`
[INFO] [stdout] 9e29e5becd73fdd58b7be6373f4b3704514f9b49e5f5f05973c0bd47dd6395b8
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7617d3892a3f24cd9a3f45818494799783170e311d10393687245c0bbcbd2c2c
[INFO] running `Command { std: "docker" "start" "-a" "7617d3892a3f24cd9a3f45818494799783170e311d10393687245c0bbcbd2c2c", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling testbench v0.9.0
[INFO] [stderr]    Compiling spmc_buffer v0.5.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "7617d3892a3f24cd9a3f45818494799783170e311d10393687245c0bbcbd2c2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7617d3892a3f24cd9a3f45818494799783170e311d10393687245c0bbcbd2c2c", kill_on_drop: false }`
[INFO] [stdout] 7617d3892a3f24cd9a3f45818494799783170e311d10393687245c0bbcbd2c2c
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 993ef4ec102c690ca7e672ccaef2a08f2d0a70b6a19b1612bbebdcea0d45f2a4
[INFO] running `Command { std: "docker" "start" "-a" "993ef4ec102c690ca7e672ccaef2a08f2d0a70b6a19b1612bbebdcea0d45f2a4", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling spmc_buffer v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `testbench::race_cell::UsizeRaceCell`
[INFO] [stdout]    --> src/lib.rs:541:39
[INFO] [stdout]     |
[INFO] [stdout] 541 |     use testbench::race_cell::{Racey, UsizeRaceCell};
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^ no `UsizeRaceCell` in `race_cell`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `benchmark` in crate `testbench`
[INFO] [stdout]     --> src/lib.rs:1008:20
[INFO] [stdout]      |
[INFO] [stdout] 1008 |         testbench::benchmark(3_000_000_000u32, || {
[INFO] [stdout]      |                    ^^^^^^^^^ not found in `testbench`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `benchmark` in crate `testbench`
[INFO] [stdout]     --> src/lib.rs:1023:20
[INFO] [stdout]      |
[INFO] [stdout] 1023 |         testbench::benchmark(300_000_000u32, || {
[INFO] [stdout]      |                    ^^^^^^^^^ not found in `testbench`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `benchmark` in crate `testbench`
[INFO] [stdout]     --> src/lib.rs:1038:20
[INFO] [stdout]      |
[INFO] [stdout] 1038 |         testbench::benchmark(140_000_000u32, || {
[INFO] [stdout]      |                    ^^^^^^^^^ not found in `testbench`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `concurrent_benchmark` in crate `testbench`
[INFO] [stdout]     --> src/lib.rs:1056:20
[INFO] [stdout]      |
[INFO] [stdout] 1056 |         testbench::concurrent_benchmark(
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^ not found in `testbench`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `concurrent_benchmark` in crate `testbench`
[INFO] [stdout]     --> src/lib.rs:1079:20
[INFO] [stdout]      |
[INFO] [stdout] 1079 |         testbench::concurrent_benchmark(
[INFO] [stdout]      |                    ^^^^^^^^^^^^^^^^^^^^ not found in `testbench`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `spmc_buffer` (lib test) due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "993ef4ec102c690ca7e672ccaef2a08f2d0a70b6a19b1612bbebdcea0d45f2a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "993ef4ec102c690ca7e672ccaef2a08f2d0a70b6a19b1612bbebdcea0d45f2a4", kill_on_drop: false }`
[INFO] [stdout] 993ef4ec102c690ca7e672ccaef2a08f2d0a70b6a19b1612bbebdcea0d45f2a4
