[INFO] fetching crate stutter 0.1.0...
[INFO] testing stutter-0.1.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate stutter 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate stutter 0.1.0
[INFO] finished tweaking crates.io crate stutter 0.1.0
[INFO] tweaked toml for crates.io crate stutter 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stutter 0.1.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4ee705ac90a55e5289b500f5cd5b660ec20157e9115246a06f810799e0697b4
[INFO] running `Command { std: "docker" "start" "-a" "f4ee705ac90a55e5289b500f5cd5b660ec20157e9115246a06f810799e0697b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4ee705ac90a55e5289b500f5cd5b660ec20157e9115246a06f810799e0697b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4ee705ac90a55e5289b500f5cd5b660ec20157e9115246a06f810799e0697b4", kill_on_drop: false }`
[INFO] [stdout] f4ee705ac90a55e5289b500f5cd5b660ec20157e9115246a06f810799e0697b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c0543e5f13ba837ba9ab9ef53501ec1b316dfbdb360d4d45a85936f6a9cef6e
[INFO] running `Command { std: "docker" "start" "-a" "6c0543e5f13ba837ba9ab9ef53501ec1b316dfbdb360d4d45a85936f6a9cef6e", kill_on_drop: false }`
[INFO] [stderr]    Compiling stutter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "6c0543e5f13ba837ba9ab9ef53501ec1b316dfbdb360d4d45a85936f6a9cef6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c0543e5f13ba837ba9ab9ef53501ec1b316dfbdb360d4d45a85936f6a9cef6e", kill_on_drop: false }`
[INFO] [stdout] 6c0543e5f13ba837ba9ab9ef53501ec1b316dfbdb360d4d45a85936f6a9cef6e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f667095a6d19b665eff824579ad82e5d2273b44bc7dbc6100fa52169569b2bc
[INFO] running `Command { std: "docker" "start" "-a" "1f667095a6d19b665eff824579ad82e5d2273b44bc7dbc6100fa52169569b2bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling stutter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> tests/expr.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     for i in 0..n {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `BoolLiteral`, `Variable`, `Add`, and `Sub` are never constructed
[INFO] [stdout]   --> tests/expr.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | enum Expr {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout]  8 |     IntLiteral(i64),
[INFO] [stdout]  9 |     BoolLiteral(bool),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 10 |     Variable(String),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 11 |     Add(Box<Expr>, Box<Expr>),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 12 |     Sub(Box<Expr>, Box<Expr>),
[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 `set` is never used
[INFO] [stdout]   --> tests/expr.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Environment {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub fn set(&mut self, var: String, value: Value) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `Command { std: "docker" "inspect" "1f667095a6d19b665eff824579ad82e5d2273b44bc7dbc6100fa52169569b2bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f667095a6d19b665eff824579ad82e5d2273b44bc7dbc6100fa52169569b2bc", kill_on_drop: false }`
[INFO] [stdout] 1f667095a6d19b665eff824579ad82e5d2273b44bc7dbc6100fa52169569b2bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c5c9dcaef9dc3f4dd8738d24ad9329fca74ec004ece0d7948d4ca78add87311e
[INFO] running `Command { std: "docker" "start" "-a" "c5c9dcaef9dc3f4dd8738d24ad9329fca74ec004ece0d7948d4ca78add87311e", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> tests/expr.rs:91:9
[INFO] [stderr]    |
[INFO] [stderr] 91 |     for i in 0..n {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variants `BoolLiteral`, `Variable`, `Add`, and `Sub` are never constructed
[INFO] [stderr]   --> tests/expr.rs:9:5
[INFO] [stderr]    |
[INFO] [stderr]  7 | enum Expr {
[INFO] [stderr]    |      ---- variants in this enum
[INFO] [stderr]  8 |     IntLiteral(i64),
[INFO] [stderr]  9 |     BoolLiteral(bool),
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 10 |     Variable(String),
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 11 |     Add(Box<Expr>, Box<Expr>),
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 12 |     Sub(Box<Expr>, Box<Expr>),
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `set` is never used
[INFO] [stderr]   --> tests/expr.rs:40:12
[INFO] [stderr]    |
[INFO] [stderr] 32 | impl Environment {
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 40 |     pub fn set(&mut self, var: String, value: Value) {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `stutter` (test "expr") generated 3 warnings (run `cargo fix --test "expr" -p stutter` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/stutter-0d46c8ce6b04f171)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/expr.rs (/opt/rustwide/target/debug/deps/expr-fefcce4e3f9827f3)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_step_01 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stutter
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c5c9dcaef9dc3f4dd8738d24ad9329fca74ec004ece0d7948d4ca78add87311e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5c9dcaef9dc3f4dd8738d24ad9329fca74ec004ece0d7948d4ca78add87311e", kill_on_drop: false }`
[INFO] [stdout] c5c9dcaef9dc3f4dd8738d24ad9329fca74ec004ece0d7948d4ca78add87311e