[INFO] fetching crate simpl 0.1.0...
[INFO] testing simpl-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate simpl 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate simpl 0.1.0
[INFO] finished tweaking crates.io crate simpl 0.1.0
[INFO] tweaked toml for crates.io crate simpl 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate simpl 0.1.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "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-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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 47a97dfaa514020ad230a1e1ac83e60ece4d4172a675c4158d07de8ba62a787b
[INFO] running `Command { std: "docker" "start" "-a" "47a97dfaa514020ad230a1e1ac83e60ece4d4172a675c4158d07de8ba62a787b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47a97dfaa514020ad230a1e1ac83e60ece4d4172a675c4158d07de8ba62a787b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47a97dfaa514020ad230a1e1ac83e60ece4d4172a675c4158d07de8ba62a787b", kill_on_drop: false }`
[INFO] [stdout] 47a97dfaa514020ad230a1e1ac83e60ece4d4172a675c4158d07de8ba62a787b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] e6059b89539037d38669951c460b004ff1a993e949e36fc2b94cb86e70bea832
[INFO] running `Command { std: "docker" "start" "-a" "e6059b89539037d38669951c460b004ff1a993e949e36fc2b94cb86e70bea832", kill_on_drop: false }`
[INFO] [stderr]    Compiling simpl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "e6059b89539037d38669951c460b004ff1a993e949e36fc2b94cb86e70bea832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6059b89539037d38669951c460b004ff1a993e949e36fc2b94cb86e70bea832", kill_on_drop: false }`
[INFO] [stdout] e6059b89539037d38669951c460b004ff1a993e949e36fc2b94cb86e70bea832
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2e1d4c313d282a77eef26dd0c369cdf50becaf848e832474bb087e2714036c39
[INFO] running `Command { std: "docker" "start" "-a" "2e1d4c313d282a77eef26dd0c369cdf50becaf848e832474bb087e2714036c39", kill_on_drop: false }`
[INFO] [stderr]    Compiling simpl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]   --> src/lib.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |               pub data: Option<String>,
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |       super::err!(TestError,
[INFO] [stdout]    |       -           --------- field in this struct
[INFO] [stdout]    |  _____|
[INFO] [stdout]    | |
[INFO] [stdout] 95 | |         {
[INFO] [stdout] 96 | |             Io@std::io::Error;
[INFO] [stdout] 97 | |         }
[INFO] [stdout] 98 | |     );
[INFO] [stdout]    | |_____- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TestError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]    = note: this warning originates in the macro `super::err` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "2e1d4c313d282a77eef26dd0c369cdf50becaf848e832474bb087e2714036c39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e1d4c313d282a77eef26dd0c369cdf50becaf848e832474bb087e2714036c39", kill_on_drop: false }`
[INFO] [stdout] 2e1d4c313d282a77eef26dd0c369cdf50becaf848e832474bb087e2714036c39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 559aaea09d0eec1e66a0775d8b7bdfe24e94c1398acdff67cd81800f3c69d085
[INFO] running `Command { std: "docker" "start" "-a" "559aaea09d0eec1e66a0775d8b7bdfe24e94c1398acdff67cd81800f3c69d085", kill_on_drop: false }`
[INFO] [stderr] warning: field `data` is never read
[INFO] [stdout] 
[INFO] [stderr]   --> src/lib.rs:44:17
[INFO] [stdout] running 2 tests
[INFO] [stderr]    |
[INFO] [stderr] 44 |               pub data: Option<String>,
[INFO] [stderr]    |                   ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 94 |       super::err!(TestError,
[INFO] [stdout] test tests::should_succeed ... FAILED
[INFO] [stderr]    |       -           --------- field in this struct
[INFO] [stderr]    |  _____|
[INFO] [stderr]    | |
[INFO] [stderr] 95 | |         {
[INFO] [stderr] 96 | |             Io@std::io::Error;
[INFO] [stderr] 97 | |         }
[INFO] [stderr] 98 | |     );
[INFO] [stderr]    | |_____- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: `TestError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr]    = note: this warning originates in the macro `super::err` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `simpl` (lib test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/simpl-e532b4eb85cf7d48)
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stdout] test tests::should_fail_wrapper - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::should_succeed stdout ----
[INFO] [stdout] Error: TestError { description: Some("Read-only file system (os error 30)"), data: None, source: Some(Io(Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" })) }
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::should_succeed
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 1 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "559aaea09d0eec1e66a0775d8b7bdfe24e94c1398acdff67cd81800f3c69d085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "559aaea09d0eec1e66a0775d8b7bdfe24e94c1398acdff67cd81800f3c69d085", kill_on_drop: false }`
[INFO] [stdout] 559aaea09d0eec1e66a0775d8b7bdfe24e94c1398acdff67cd81800f3c69d085
