[INFO] fetching crate stack-machine 0.1.0...
[INFO] testing stack-machine-0.1.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate stack-machine 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate stack-machine 0.1.0
[INFO] finished tweaking crates.io crate stack-machine 0.1.0
[INFO] tweaked toml for crates.io crate stack-machine 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stack-machine 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] crate crates.io crate stack-machine 0.1.0 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-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-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c28903d9c0d580ff01a3182cac8923d36903ff7be8627cb31a0bbf7a629c514
[INFO] running `Command { std: "docker" "start" "-a" "5c28903d9c0d580ff01a3182cac8923d36903ff7be8627cb31a0bbf7a629c514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c28903d9c0d580ff01a3182cac8923d36903ff7be8627cb31a0bbf7a629c514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c28903d9c0d580ff01a3182cac8923d36903ff7be8627cb31a0bbf7a629c514", kill_on_drop: false }`
[INFO] [stdout] 5c28903d9c0d580ff01a3182cac8923d36903ff7be8627cb31a0bbf7a629c514
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2fcf787064654e44c10e9dbf8bd12caddaf0e1fb9c8a4a77fc7e442d04926ca2
[INFO] running `Command { std: "docker" "start" "-a" "2fcf787064654e44c10e9dbf8bd12caddaf0e1fb9c8a4a77fc7e442d04926ca2", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack-machine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `mut1_err` is never used
[INFO] [stdout]   --> src/main.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | trait SpecialStack {
[INFO] [stdout]    |       ------------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn mut1_err(&mut self, f: fn(i64) -> Result<Vec<i64>, String>) -> StackResponse;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "2fcf787064654e44c10e9dbf8bd12caddaf0e1fb9c8a4a77fc7e442d04926ca2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fcf787064654e44c10e9dbf8bd12caddaf0e1fb9c8a4a77fc7e442d04926ca2", kill_on_drop: false }`
[INFO] [stdout] 2fcf787064654e44c10e9dbf8bd12caddaf0e1fb9c8a4a77fc7e442d04926ca2
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c3e1e77ea630f4dc77765dd9dc6a16109b90fae873dd485273d227e5d03299d
[INFO] running `Command { std: "docker" "start" "-a" "5c3e1e77ea630f4dc77765dd9dc6a16109b90fae873dd485273d227e5d03299d", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack-machine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `mut1_err` is never used
[INFO] [stdout]   --> src/main.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | trait SpecialStack {
[INFO] [stdout]    |       ------------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn mut1_err(&mut self, f: fn(i64) -> Result<Vec<i64>, String>) -> StackResponse;
[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 0.77s
[INFO] running `Command { std: "docker" "inspect" "5c3e1e77ea630f4dc77765dd9dc6a16109b90fae873dd485273d227e5d03299d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c3e1e77ea630f4dc77765dd9dc6a16109b90fae873dd485273d227e5d03299d", kill_on_drop: false }`
[INFO] [stdout] 5c3e1e77ea630f4dc77765dd9dc6a16109b90fae873dd485273d227e5d03299d
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4370ce1542949d24a13d37458883fb9525e86a68b46877c10fdd1769e60a53ad
[INFO] running `Command { std: "docker" "start" "-a" "4370ce1542949d24a13d37458883fb9525e86a68b46877c10fdd1769e60a53ad", kill_on_drop: false }`
[INFO] [stderr] warning: method `mut1_err` is never used
[INFO] [stderr]   --> src/main.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 50 | trait SpecialStack {
[INFO] [stderr]    |       ------------ method in this trait
[INFO] [stderr] ...
[INFO] [stderr] 55 |     fn mut1_err(&mut self, f: fn(i64) -> Result<Vec<i64>, String>) -> StackResponse;
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `stack-machine` (bin "stack-machine" 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/stack_machine-989dd341f4cbb26f)
[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" "4370ce1542949d24a13d37458883fb9525e86a68b46877c10fdd1769e60a53ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4370ce1542949d24a13d37458883fb9525e86a68b46877c10fdd1769e60a53ad", kill_on_drop: false }`
[INFO] [stdout] 4370ce1542949d24a13d37458883fb9525e86a68b46877c10fdd1769e60a53ad