[INFO] fetching crate stackpack 1.0.1...
[INFO] testing stackpack-1.0.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate stackpack 1.0.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate stackpack 1.0.1
[INFO] finished tweaking crates.io crate stackpack 1.0.1
[INFO] tweaked toml for crates.io crate stackpack 1.0.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stackpack 1.0.1 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 stackpack 1.0.1 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] [stderr]     Blocking waiting for file lock on package cache
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01dbd08e3ae84c67ce74f8e987c57462c9d76b0ae8c07ba9894f8a869bf455ad
[INFO] running `Command { std: "docker" "start" "-a" "01dbd08e3ae84c67ce74f8e987c57462c9d76b0ae8c07ba9894f8a869bf455ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01dbd08e3ae84c67ce74f8e987c57462c9d76b0ae8c07ba9894f8a869bf455ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01dbd08e3ae84c67ce74f8e987c57462c9d76b0ae8c07ba9894f8a869bf455ad", kill_on_drop: false }`
[INFO] [stdout] 01dbd08e3ae84c67ce74f8e987c57462c9d76b0ae8c07ba9894f8a869bf455ad
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26668285eb462ef9bde0989980e79cd4e883731ef9747c4bf19e415d769229c9
[INFO] running `Command { std: "docker" "start" "-a" "26668285eb462ef9bde0989980e79cd4e883731ef9747c4bf19e415d769229c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling find-msvc-tools v0.1.4
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling anstyle v1.0.13
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.2
[INFO] [stderr]    Compiling anstyle-query v1.1.4
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]    Compiling tracing-core v0.1.34
[INFO] [stderr]    Compiling anyhow v1.0.100
[INFO] [stderr]    Compiling clap_lex v0.7.6
[INFO] [stderr]    Compiling sharded-slab v0.1.7
[INFO] [stderr]    Compiling thread_local v1.1.9
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]    Compiling fenwick v1.0.0
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling cc v1.2.45
[INFO] [stderr]    Compiling bitbit v0.2.0
[INFO] [stderr]    Compiling bytemuck v1.24.0
[INFO] [stderr]    Compiling libloading v0.9.0
[INFO] [stderr]    Compiling arcode v0.2.4
[INFO] [stderr]    Compiling walkdir v2.5.0
[INFO] [stderr]    Compiling voxell_timer v1.2.2
[INFO] [stderr]    Compiling anstream v0.6.21
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling clap_builder v4.5.51
[INFO] [stderr]    Compiling tracing-subscriber v0.3.20
[INFO] [stderr]    Compiling openmp-sys v1.3.0
[INFO] [stderr]    Compiling libsais-sys v0.2.0
[INFO] [stderr]    Compiling bsc_m03_sys v0.1.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling clap_derive v4.5.49
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling clap v4.5.51
[INFO] [stderr]    Compiling libsais v0.2.0
[INFO] [stderr]    Compiling stackpack v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `DynMutator`
[INFO] [stdout]  --> src/algorithms/pipeline.rs:2:18
[INFO] [stdout]   |
[INFO] [stdout] 2 |     algorithms::{DynMutator, arcode::ArithmeticCoding, bsc::Bsc, bwt::Bwt, mtf::Mtf},
[INFO] [stdout]   |                  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mode` is never used
[INFO] [stdout]    --> src/cli.rs:216:12
[INFO] [stdout]     |
[INFO] [stdout] 215 | impl PipelinePersistenceArgs {
[INFO] [stdout]     | ---------------------------- method in this implementation
[INFO] [stdout] 216 |     pub fn mode(&self) -> PipelinePersistence {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PipelinePersistence` is never used
[INFO] [stdout]    --> src/cli.rs:229:10
[INFO] [stdout]     |
[INFO] [stdout] 229 | pub enum PipelinePersistence {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `persistence_mode` is never used
[INFO] [stdout]    --> src/cli.rs:253:12
[INFO] [stdout]     |
[INFO] [stdout] 248 | impl EncodeArgs {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 253 |     pub fn persistence_mode(&self) -> PipelinePersistence {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `lib` is never read
[INFO] [stdout]   --> src/plugins.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 88 | pub struct Plugin {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub lib: Library,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.67s
[INFO] running `Command { std: "docker" "inspect" "26668285eb462ef9bde0989980e79cd4e883731ef9747c4bf19e415d769229c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26668285eb462ef9bde0989980e79cd4e883731ef9747c4bf19e415d769229c9", kill_on_drop: false }`
[INFO] [stdout] 26668285eb462ef9bde0989980e79cd4e883731ef9747c4bf19e415d769229c9
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 697836c35915393a7c7701a3b5f2aa48599fcb85a2a1dda5b6b88058952d11db
[INFO] running `Command { std: "docker" "start" "-a" "697836c35915393a7c7701a3b5f2aa48599fcb85a2a1dda5b6b88058952d11db", kill_on_drop: false }`
[INFO] [stderr]    Compiling stackpack v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `DynMutator`
[INFO] [stdout]  --> src/algorithms/pipeline.rs:2:18
[INFO] [stdout]   |
[INFO] [stdout] 2 |     algorithms::{DynMutator, arcode::ArithmeticCoding, bsc::Bsc, bwt::Bwt, mtf::Mtf},
[INFO] [stdout]   |                  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mode` is never used
[INFO] [stdout]    --> src/cli.rs:216:12
[INFO] [stdout]     |
[INFO] [stdout] 215 | impl PipelinePersistenceArgs {
[INFO] [stdout]     | ---------------------------- method in this implementation
[INFO] [stdout] 216 |     pub fn mode(&self) -> PipelinePersistence {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PipelinePersistence` is never used
[INFO] [stdout]    --> src/cli.rs:229:10
[INFO] [stdout]     |
[INFO] [stdout] 229 | pub enum PipelinePersistence {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `persistence_mode` is never used
[INFO] [stdout]    --> src/cli.rs:253:12
[INFO] [stdout]     |
[INFO] [stdout] 248 | impl EncodeArgs {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 253 |     pub fn persistence_mode(&self) -> PipelinePersistence {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `lib` is never read
[INFO] [stdout]   --> src/plugins.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 88 | pub struct Plugin {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 91 |     pub lib: Library,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `Command { std: "docker" "inspect" "697836c35915393a7c7701a3b5f2aa48599fcb85a2a1dda5b6b88058952d11db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "697836c35915393a7c7701a3b5f2aa48599fcb85a2a1dda5b6b88058952d11db", kill_on_drop: false }`
[INFO] [stdout] 697836c35915393a7c7701a3b5f2aa48599fcb85a2a1dda5b6b88058952d11db
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 820b565c311e0a6706a93b657b321afc77d186e8b650c3bb7bfb7dd367897582
[INFO] running `Command { std: "docker" "start" "-a" "820b565c311e0a6706a93b657b321afc77d186e8b650c3bb7bfb7dd367897582", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `DynMutator`
[INFO] [stderr]  --> src/algorithms/pipeline.rs:2:18
[INFO] [stderr]   |
[INFO] [stderr] 2 |     algorithms::{DynMutator, arcode::ArithmeticCoding, bsc::Bsc, bwt::Bwt, mtf::Mtf},
[INFO] [stderr]   |                  ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `mode` is never used
[INFO] [stderr]    --> src/cli.rs:216:12
[INFO] [stderr]     |
[INFO] [stderr] 215 | impl PipelinePersistenceArgs {
[INFO] [stderr]     | ---------------------------- method in this implementation
[INFO] [stderr] 216 |     pub fn mode(&self) -> PipelinePersistence {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum `PipelinePersistence` is never used
[INFO] [stderr]    --> src/cli.rs:229:10
[INFO] [stderr]     |
[INFO] [stderr] 229 | pub enum PipelinePersistence {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `persistence_mode` is never used
[INFO] [stderr]    --> src/cli.rs:253:12
[INFO] [stderr]     |
[INFO] [stderr] 248 | impl EncodeArgs {
[INFO] [stderr]     | --------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 253 |     pub fn persistence_mode(&self) -> PipelinePersistence {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `lib` is never read
[INFO] [stderr]   --> src/plugins.rs:91:9
[INFO] [stderr]    |
[INFO] [stderr] 88 | pub struct Plugin {
[INFO] [stderr]    |            ------ field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 91 |     pub lib: Library,
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `stackpack` (bin "stackpack" test) generated 5 warnings (run `cargo fix --bin "stackpack" -p stackpack --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/stackpack-d02e8c203790c553)
[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" "820b565c311e0a6706a93b657b321afc77d186e8b650c3bb7bfb7dd367897582", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "820b565c311e0a6706a93b657b321afc77d186e8b650c3bb7bfb7dd367897582", kill_on_drop: false }`
[INFO] [stdout] 820b565c311e0a6706a93b657b321afc77d186e8b650c3bb7bfb7dd367897582
