[INFO] fetching crate slop-tensor 6.1.0...
[INFO] testing slop-tensor-6.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate slop-tensor 6.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate slop-tensor 6.1.0
[INFO] finished tweaking crates.io crate slop-tensor 6.1.0
[INFO] tweaked toml for crates.io crate slop-tensor 6.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate slop-tensor 6.1.0 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 slop-tensor 6.1.0 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 05240b6b74dcdba346ea9c06c1ced897d008628ca96a14a220418fe44838876f
[INFO] running `Command { std: "docker" "start" "-a" "05240b6b74dcdba346ea9c06c1ced897d008628ca96a14a220418fe44838876f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05240b6b74dcdba346ea9c06c1ced897d008628ca96a14a220418fe44838876f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05240b6b74dcdba346ea9c06c1ced897d008628ca96a14a220418fe44838876f", kill_on_drop: false }`
[INFO] [stdout] 05240b6b74dcdba346ea9c06c1ced897d008628ca96a14a220418fe44838876f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 9f5a7da187c94f433408a9c4165ef20d95129a36a76435bfad8aec98db781c62
[INFO] running `Command { std: "docker" "start" "-a" "9f5a7da187c94f433408a9c4165ef20d95129a36a76435bfad8aec98db781c62", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.180
[INFO] [stderr]    Compiling zerocopy v0.8.35
[INFO] [stderr]    Compiling futures-core v0.3.31
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling itertools v0.12.1
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling p3-maybe-rayon v0.3.2-succinct
[INFO] [stderr]    Compiling tokio v1.49.0
[INFO] [stderr]    Compiling strength_reduce v0.2.4
[INFO] [stderr]    Compiling arrayvec v0.7.6
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]    Compiling derive-where v1.6.0
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling p3-util v0.3.2-succinct
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling pin-project v1.1.10
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling transpose v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]    Compiling slop-futures v6.1.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling p3-field v0.3.2-succinct
[INFO] [stderr]    Compiling slop-algebra v6.1.0
[INFO] [stderr]    Compiling p3-matrix v0.3.2-succinct
[INFO] [stderr]    Compiling slop-matrix v6.1.0
[INFO] [stderr]    Compiling slop-alloc v6.1.0
[INFO] [stderr]    Compiling slop-tensor v6.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.82s
[INFO] running `Command { std: "docker" "inspect" "9f5a7da187c94f433408a9c4165ef20d95129a36a76435bfad8aec98db781c62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f5a7da187c94f433408a9c4165ef20d95129a36a76435bfad8aec98db781c62", kill_on_drop: false }`
[INFO] [stdout] 9f5a7da187c94f433408a9c4165ef20d95129a36a76435bfad8aec98db781c62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] cee979cb99deb249e3d9b8cb277e8a1c23ccb06618687804b19cb87a20b9c684
[INFO] running `Command { std: "docker" "start" "-a" "cee979cb99deb249e3d9b8cb277e8a1c23ccb06618687804b19cb87a20b9c684", kill_on_drop: false }`
[INFO] [stderr]    Compiling slop-tensor v6.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `slop_baby_bear`
[INFO] [stdout]   --> src/dot.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     use slop_baby_bear::BabyBear;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `slop_baby_bear`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `slop_baby_bear`, use `cargo add slop_baby_bear` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `slop_baby_bear`
[INFO] [stdout]   --> src/reduce.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     use slop_baby_bear::BabyBear;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `slop_baby_bear`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `slop_baby_bear`, use `cargo add slop_baby_bear` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slop_algebra::AbstractField`
[INFO] [stdout]   --> src/dot.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     use slop_algebra::AbstractField;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slop_algebra::AbstractField`
[INFO] [stdout]   --> src/reduce.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     use slop_algebra::AbstractField;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `serde_json` in this scope
[INFO] [stdout]    --> src/inner.rs:852:26
[INFO] [stdout]     |
[INFO] [stdout] 852 |         let serialized = serde_json::to_string(&tensor).unwrap();
[INFO] [stdout]     |                          ^^^^^^^^^^ use of unresolved module or unlinked crate `serde_json`
[INFO] [stdout]     |
[INFO] [stdout]     = help: if you wanted to use a crate named `serde_json`, use `cargo add serde_json` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `serde_json` in this scope
[INFO] [stdout]    --> src/inner.rs:853:41
[INFO] [stdout]     |
[INFO] [stdout] 853 |         let deserialized: Tensor<u32> = serde_json::from_str(&serialized).unwrap();
[INFO] [stdout]     |                                         ^^^^^^^^^^ use of unresolved module or unlinked crate `serde_json`
[INFO] [stdout]     |
[INFO] [stdout]     = help: if you wanted to use a crate named `serde_json`, use `cargo add serde_json` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `slop-tensor` (lib test) due to 4 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "cee979cb99deb249e3d9b8cb277e8a1c23ccb06618687804b19cb87a20b9c684", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cee979cb99deb249e3d9b8cb277e8a1c23ccb06618687804b19cb87a20b9c684", kill_on_drop: false }`
[INFO] [stdout] cee979cb99deb249e3d9b8cb277e8a1c23ccb06618687804b19cb87a20b9c684
