[INFO] fetching crate rl4burn 0.1.1...
[INFO] testing rl4burn-0.1.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate rl4burn 0.1.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rl4burn 0.1.1
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rl4burn 0.1.1
[INFO] tweaked toml for crates.io crate rl4burn 0.1.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rl4burn 0.1.1 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 rl4burn 0.1.1 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] a269af5ad60af5dc576dabe67831fbbca9422193c907f565708c110a8f5c2f6c
[INFO] running `Command { std: "docker" "start" "-a" "a269af5ad60af5dc576dabe67831fbbca9422193c907f565708c110a8f5c2f6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a269af5ad60af5dc576dabe67831fbbca9422193c907f565708c110a8f5c2f6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a269af5ad60af5dc576dabe67831fbbca9422193c907f565708c110a8f5c2f6c", kill_on_drop: false }`
[INFO] [stdout] a269af5ad60af5dc576dabe67831fbbca9422193c907f565708c110a8f5c2f6c
[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] 77486d868581d361312f7c78ed8b68d48159082d98df2ff20de02f81a55530ab
[INFO] running `Command { std: "docker" "start" "-a" "77486d868581d361312f7c78ed8b68d48159082d98df2ff20de02f81a55530ab", kill_on_drop: false }`
[INFO] [stderr]    Compiling zerocopy v0.8.42
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling convert_case v0.10.0
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]    Compiling gimli v0.32.3
[INFO] [stderr]    Compiling fastrand v2.3.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling cubecl-common v0.9.0
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling rustc-demangle v0.1.27
[INFO] [stderr]    Compiling zerocopy-derive v0.8.42
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling bytemuck_derive v1.10.2
[INFO] [stderr]    Compiling derive-new v0.7.0
[INFO] [stderr]    Compiling serde_bytes v0.11.19
[INFO] [stderr]    Compiling embassy-futures v0.1.2
[INFO] [stderr]    Compiling derive_more-impl v2.1.1
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling futures-lite v2.6.1
[INFO] [stderr]    Compiling bytes v1.11.1
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling spin v0.10.0
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling unty v0.0.4
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling colored v3.1.1
[INFO] [stderr]    Compiling burn-derive v0.20.1
[INFO] [stderr]    Compiling rmp v0.8.15
[INFO] [stderr]    Compiling uuid v1.22.0
[INFO] [stderr]    Compiling data-encoding v2.10.0
[INFO] [stderr]    Compiling rand v0.10.0
[INFO] [stderr]    Compiling contracts v0.6.7
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling rand_distr v0.6.0
[INFO] [stderr]    Compiling derive_more v2.1.1
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling addr2line v0.25.1
[INFO] [stderr]    Compiling backtrace v0.3.76
[INFO] [stderr]    Compiling bincode v2.0.1
[INFO] [stderr]    Compiling rmp-serde v1.3.1
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling half v2.7.1
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling rand_distr v0.5.1
[INFO] [stderr]    Compiling burn-std v0.20.1
[INFO] [stderr]    Compiling burn-backend v0.20.1
[INFO] [stderr]    Compiling burn-tensor v0.20.1
[INFO] [stderr]    Compiling burn-core v0.20.1
[INFO] [stderr]    Compiling burn-optim v0.20.1
[INFO] [stderr]    Compiling burn-nn v0.20.1
[INFO] [stderr]    Compiling burn v0.20.1
[INFO] [stderr]    Compiling rl4burn v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 44.85s
[INFO] running `Command { std: "docker" "inspect" "77486d868581d361312f7c78ed8b68d48159082d98df2ff20de02f81a55530ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77486d868581d361312f7c78ed8b68d48159082d98df2ff20de02f81a55530ab", kill_on_drop: false }`
[INFO] [stdout] 77486d868581d361312f7c78ed8b68d48159082d98df2ff20de02f81a55530ab
[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] 604cb789d3e6b6caac137ed2b425097154ac9318c1c42adbdbe6fcbd828afaa9
[INFO] running `Command { std: "docker" "start" "-a" "604cb789d3e6b6caac137ed2b425097154ac9318c1c42adbdbe6fcbd828afaa9", kill_on_drop: false }`
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]    Compiling libc v0.2.183
[INFO] [stderr]    Compiling darling_core v0.20.11
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling rmp v0.8.15
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling macerator v0.2.10
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling burn-ndarray v0.20.1
[INFO] [stderr]    Compiling moddef v0.3.0
[INFO] [stderr]    Compiling atomic_float v1.1.0
[INFO] [stderr]    Compiling rand_distr v0.6.0
[INFO] [stderr]    Compiling rmp-serde v1.3.1
[INFO] [stderr]    Compiling half v2.7.1
[INFO] [stderr]    Compiling ndarray v0.17.2
[INFO] [stderr]    Compiling rand_distr v0.5.1
[INFO] [stderr]    Compiling spin v0.10.0
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling cubecl-common v0.9.0
[INFO] [stderr]    Compiling const-random-macro v0.1.16
[INFO] [stderr]    Compiling const-random v0.1.18
[INFO] [stderr]    Compiling burn-std v0.20.1
[INFO] [stderr]    Compiling darling_macro v0.20.11
[INFO] [stderr]    Compiling burn-backend v0.20.1
[INFO] [stderr]    Compiling darling v0.20.11
[INFO] [stderr]    Compiling macerator-macros v0.1.4
[INFO] [stderr]    Compiling burn-tensor v0.20.1
[INFO] [stderr]    Compiling burn-autodiff v0.20.1
[INFO] [stderr]    Compiling burn-ir v0.20.1
[INFO] [stderr]    Compiling burn-core v0.20.1
[INFO] [stderr]    Compiling burn-optim v0.20.1
[INFO] [stderr]    Compiling burn-nn v0.20.1
[INFO] [stderr]    Compiling burn v0.20.1
[INFO] [stderr]    Compiling rl4burn v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `burn::grad_clipping::GradientClippingConfig`
[INFO] [stdout]  --> tests/ppo_cartpole.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use burn::grad_clipping::GradientClippingConfig;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `stats` is assigned to, but never used
[INFO] [stdout]    --> tests/dqn_cartpole.rs:117:17
[INFO] [stdout]     |
[INFO] [stdout] 117 |             let stats;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_stats` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `stats` is never read
[INFO] [stdout]    --> tests/dqn_cartpole.rs:118:22
[INFO] [stdout]     |
[INFO] [stdout] 118 |             (online, stats) = dqn_update(online, &target, &mut optim, &mut buffer, &config, &device);
[INFO] [stdout]     |                      ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rl4burn` (example "ppo_cartpole")
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name ppo_cartpole --edition=2021 examples/ppo_cartpole.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("crc32c", "default", "gif", "json-log", "ndarray", "tensorboard", "video"))' -C metadata=ad2fbc4a13992b34 -C extra-filename=-44a1bd67dfb96b16 --out-dir /opt/rustwide/target/debug/examples -L dependency=/opt/rustwide/target/debug/deps --extern burn=/opt/rustwide/target/debug/deps/libburn-0bcf66d09d86cc4c.rlib --extern contracts=/opt/rustwide/target/debug/deps/libcontracts-e6cf792ab5a3c205.so --extern rand=/opt/rustwide/target/debug/deps/librand-8769d5d997e8564b.rlib --extern rand_distr=/opt/rustwide/target/debug/deps/librand_distr-a8aa2a07f4669e95.rlib --extern rl4burn=/opt/rustwide/target/debug/deps/librl4burn-15bb59be1e5cb235.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `rl4burn` (example "ppo_pendulum")
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name ppo_pendulum --edition=2021 examples/ppo_pendulum.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("crc32c", "default", "gif", "json-log", "ndarray", "tensorboard", "video"))' -C metadata=b5226b13c1567087 -C extra-filename=-6061fd9790f46995 --out-dir /opt/rustwide/target/debug/examples -L dependency=/opt/rustwide/target/debug/deps --extern burn=/opt/rustwide/target/debug/deps/libburn-0bcf66d09d86cc4c.rlib --extern contracts=/opt/rustwide/target/debug/deps/libcontracts-e6cf792ab5a3c205.so --extern rand=/opt/rustwide/target/debug/deps/librand-8769d5d997e8564b.rlib --extern rand_distr=/opt/rustwide/target/debug/deps/librand_distr-a8aa2a07f4669e95.rlib --extern rl4burn=/opt/rustwide/target/debug/deps/librl4burn-15bb59be1e5cb235.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not compile `rl4burn` (test "ppo_cartpole"); 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name ppo_cartpole --edition=2021 tests/ppo_cartpole.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --cfg 'feature="default"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("crc32c", "default", "gif", "json-log", "ndarray", "tensorboard", "video"))' -C metadata=828bf531f49c6b73 -C extra-filename=-90e860e1a9326b3b --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern burn=/opt/rustwide/target/debug/deps/libburn-0bcf66d09d86cc4c.rlib --extern contracts=/opt/rustwide/target/debug/deps/libcontracts-e6cf792ab5a3c205.so --extern rand=/opt/rustwide/target/debug/deps/librand-8769d5d997e8564b.rlib --extern rand_distr=/opt/rustwide/target/debug/deps/librand_distr-a8aa2a07f4669e95.rlib --extern rl4burn=/opt/rustwide/target/debug/deps/librl4burn-15bb59be1e5cb235.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not compile `rl4burn` (test "gradient_flow")
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name gradient_flow --edition=2021 tests/gradient_flow.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --cfg 'feature="default"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("crc32c", "default", "gif", "json-log", "ndarray", "tensorboard", "video"))' -C metadata=e8912b9f2fee9911 -C extra-filename=-885a375c3f6aca42 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern burn=/opt/rustwide/target/debug/deps/libburn-0bcf66d09d86cc4c.rlib --extern contracts=/opt/rustwide/target/debug/deps/libcontracts-e6cf792ab5a3c205.so --extern rand=/opt/rustwide/target/debug/deps/librand-8769d5d997e8564b.rlib --extern rand_distr=/opt/rustwide/target/debug/deps/librand_distr-a8aa2a07f4669e95.rlib --extern rl4burn=/opt/rustwide/target/debug/deps/librl4burn-15bb59be1e5cb235.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "604cb789d3e6b6caac137ed2b425097154ac9318c1c42adbdbe6fcbd828afaa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "604cb789d3e6b6caac137ed2b425097154ac9318c1c42adbdbe6fcbd828afaa9", kill_on_drop: false }`
[INFO] [stdout] 604cb789d3e6b6caac137ed2b425097154ac9318c1c42adbdbe6fcbd828afaa9
