[INFO] cloning repository https://github.com/karljohannisson/rustgrad
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/karljohannisson/rustgrad" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkarljohannisson%2Frustgrad", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkarljohannisson%2Frustgrad'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 84ce756eb19ade5cfe05886e8e6bc94f06492865
[INFO] testing karljohannisson/rustgrad against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkarljohannisson%2Frustgrad" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/karljohannisson/rustgrad
[INFO] finished tweaking git repo https://github.com/karljohannisson/rustgrad
[INFO] tweaked toml for git repo https://github.com/karljohannisson/rustgrad written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/karljohannisson/rustgrad 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 git repo https://github.com/karljohannisson/rustgrad 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] abdc25b7f8f5a1e848b1981bbbc688d352a0b0dcd2e3249899c70acdb58dc0e5
[INFO] running `Command { std: "docker" "start" "-a" "abdc25b7f8f5a1e848b1981bbbc688d352a0b0dcd2e3249899c70acdb58dc0e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abdc25b7f8f5a1e848b1981bbbc688d352a0b0dcd2e3249899c70acdb58dc0e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abdc25b7f8f5a1e848b1981bbbc688d352a0b0dcd2e3249899c70acdb58dc0e5", kill_on_drop: false }`
[INFO] [stdout] abdc25b7f8f5a1e848b1981bbbc688d352a0b0dcd2e3249899c70acdb58dc0e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 045e1135022c46a48aed9141b90e4fee10b5b43ca0d2ac2226c6be5b5e84c21b
[INFO] running `Command { std: "docker" "start" "-a" "045e1135022c46a48aed9141b90e4fee10b5b43ca0d2ac2226c6be5b5e84c21b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling rustgrad v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `grad`, `child_a`, `child_b`, and `op` are never read
[INFO] [stdout]  --> src/value.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Value {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 5 |     data: f64,
[INFO] [stdout] 6 |     grad: f64,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 7 |     child_a: Option<Box<Value>>,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 8 |     child_b: Option<Box<Value>>,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 9 |     op: String,
[INFO] [stdout]   |     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tanh` is never used
[INFO] [stdout]   --> src/value.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Value {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub fn tanh(self) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "045e1135022c46a48aed9141b90e4fee10b5b43ca0d2ac2226c6be5b5e84c21b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "045e1135022c46a48aed9141b90e4fee10b5b43ca0d2ac2226c6be5b5e84c21b", kill_on_drop: false }`
[INFO] [stdout] 045e1135022c46a48aed9141b90e4fee10b5b43ca0d2ac2226c6be5b5e84c21b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] d5203eaf23ee6711bdd8604606adbbac326675bc0efe129d1798861e0a0663fb
[INFO] running `Command { std: "docker" "start" "-a" "d5203eaf23ee6711bdd8604606adbbac326675bc0efe129d1798861e0a0663fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustgrad v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `grad` is never read
[INFO] [stdout]  --> src/value.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Value {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 5 |     data: f64,
[INFO] [stdout] 6 |     grad: f64,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "d5203eaf23ee6711bdd8604606adbbac326675bc0efe129d1798861e0a0663fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5203eaf23ee6711bdd8604606adbbac326675bc0efe129d1798861e0a0663fb", kill_on_drop: false }`
[INFO] [stdout] d5203eaf23ee6711bdd8604606adbbac326675bc0efe129d1798861e0a0663fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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", kill_on_drop: false }`
[INFO] [stdout] 0c2019d44a42ccbbfeeb2280173919123bfdc99a9fa3f14bdbc0839bd77a1fff
[INFO] running `Command { std: "docker" "start" "-a" "0c2019d44a42ccbbfeeb2280173919123bfdc99a9fa3f14bdbc0839bd77a1fff", kill_on_drop: false }`
[INFO] [stderr] warning: field `grad` is never read
[INFO] [stderr]  --> src/value.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Value {
[INFO] [stderr]   |            ----- field in this struct
[INFO] [stderr] 5 |     data: f64,
[INFO] [stderr] 6 |     grad: f64,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rustgrad` (bin "rustgrad" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustgrad-232d86e28d3ea854)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test value::tests::test_add ... ok
[INFO] [stdout] test value::tests::test_mul ... ok
[INFO] [stdout] test value::tests::test_children ... ok
[INFO] [stdout] test value::tests::test_mul_op ... ok
[INFO] [stdout] test value::tests::test_tanh ... ok
[INFO] [stdout] test value::tests::test_add_op ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0c2019d44a42ccbbfeeb2280173919123bfdc99a9fa3f14bdbc0839bd77a1fff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c2019d44a42ccbbfeeb2280173919123bfdc99a9fa3f14bdbc0839bd77a1fff", kill_on_drop: false }`
[INFO] [stdout] 0c2019d44a42ccbbfeeb2280173919123bfdc99a9fa3f14bdbc0839bd77a1fff
