[INFO] fetching crate toucan-rs 1.0.0...
[INFO] testing toucan-rs-1.0.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate toucan-rs 1.0.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate toucan-rs 1.0.0
[INFO] finished tweaking crates.io crate toucan-rs 1.0.0
[INFO] tweaked toml for crates.io crate toucan-rs 1.0.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate toucan-rs 1.0.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 107 packages to latest compatible versions
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.17)
[INFO] [stderr]       Adding worker v0.3.4 (available: v0.6.6)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd4dc8d4ae92dc8a90fbfd788d883c73d3d00ca0e5d0b8b262cd22c84202ddf6
[INFO] running `Command { std: "docker" "start" "-a" "fd4dc8d4ae92dc8a90fbfd788d883c73d3d00ca0e5d0b8b262cd22c84202ddf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd4dc8d4ae92dc8a90fbfd788d883c73d3d00ca0e5d0b8b262cd22c84202ddf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd4dc8d4ae92dc8a90fbfd788d883c73d3d00ca0e5d0b8b262cd22c84202ddf6", kill_on_drop: false }`
[INFO] [stdout] fd4dc8d4ae92dc8a90fbfd788d883c73d3d00ca0e5d0b8b262cd22c84202ddf6
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65699d609a90f4f1a20253a3e80ef0721d4aa99d74685fabb6b9304a0bcface5
[INFO] running `Command { std: "docker" "start" "-a" "65699d609a90f4f1a20253a3e80ef0721d4aa99d74685fabb6b9304a0bcface5", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.104
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling bumpalo v3.19.0
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling once_cell v1.21.3
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling writeable v0.6.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling litemap v0.8.0
[INFO] [stderr]    Compiling icu_normalizer_data v2.0.0
[INFO] [stderr]    Compiling icu_properties_data v2.0.1
[INFO] [stderr]    Compiling itoa v1.0.15
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling futures-core v0.3.31
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[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.104
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]    Compiling zerofrom v0.1.6
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[INFO] [stderr]    Compiling tinystr v0.8.1
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[INFO] [stderr]    Compiling icu_collections v2.0.0
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[INFO] [stderr]    Compiling js-sys v0.3.81
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[INFO] [stderr]    Compiling icu_provider v2.0.0
[INFO] [stderr]    Compiling icu_normalizer v2.0.0
[INFO] [stderr]    Compiling icu_properties v2.0.1
[INFO] [stderr]    Compiling idna_adapter v1.2.1
[INFO] [stderr]    Compiling idna v1.1.0
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[INFO] [stderr]    Compiling wasm-bindgen-futures v0.4.54
[INFO] [stderr]    Compiling web-sys v0.3.81
[INFO] [stderr]    Compiling serde-wasm-bindgen v0.5.0
[INFO] [stderr]    Compiling serde-wasm-bindgen v0.6.5
[INFO] [stderr]    Compiling worker-kv v0.7.0
[INFO] [stderr]    Compiling worker-sys v0.3.4
[INFO] [stderr]    Compiling worker-macros v0.3.4
[INFO] [stderr]    Compiling wasm-streams v0.4.2
[INFO] [stderr]    Compiling worker v0.3.4
[INFO] [stderr]    Compiling toucan-rs v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `backtrace` is never read
[INFO] [stdout]   --> src/error.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct ToucanError {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 10 |     pub msg: String,
[INFO] [stdout] 11 |     backtrace: Option<std::backtrace::Backtrace>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ToucanError` 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] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 07s
[INFO] running `Command { std: "docker" "inspect" "65699d609a90f4f1a20253a3e80ef0721d4aa99d74685fabb6b9304a0bcface5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65699d609a90f4f1a20253a3e80ef0721d4aa99d74685fabb6b9304a0bcface5", kill_on_drop: false }`
[INFO] [stdout] 65699d609a90f4f1a20253a3e80ef0721d4aa99d74685fabb6b9304a0bcface5
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f73e237d98dbf618633647fb47227766fa97f1a6731142215175d64e48e2382f
[INFO] running `Command { std: "docker" "start" "-a" "f73e237d98dbf618633647fb47227766fa97f1a6731142215175d64e48e2382f", kill_on_drop: false }`
[INFO] [stderr]    Compiling toucan-rs v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `backtrace` is never read
[INFO] [stdout]   --> src/error.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct ToucanError {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 10 |     pub msg: String,
[INFO] [stdout] 11 |     backtrace: Option<std::backtrace::Backtrace>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ToucanError` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `backtrace` is never read
[INFO] [stdout]   --> src/error.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct ToucanError {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 10 |     pub msg: String,
[INFO] [stdout] 11 |     backtrace: Option<std::backtrace::Backtrace>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ToucanError` 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] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "f73e237d98dbf618633647fb47227766fa97f1a6731142215175d64e48e2382f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f73e237d98dbf618633647fb47227766fa97f1a6731142215175d64e48e2382f", kill_on_drop: false }`
[INFO] [stdout] f73e237d98dbf618633647fb47227766fa97f1a6731142215175d64e48e2382f
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f2f04bcbb7b03af6e2b99efdde26a98f25ed2d470126859859906e66fded6e72
[INFO] running `Command { std: "docker" "start" "-a" "f2f04bcbb7b03af6e2b99efdde26a98f25ed2d470126859859906e66fded6e72", kill_on_drop: false }`
[INFO] [stderr] warning: field `backtrace` is never read
[INFO] [stdout] 
[INFO] [stderr]   --> src/error.rs:11:5
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr]  9 | pub struct ToucanError {
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |            ----------- field in this struct
[INFO] [stdout] 
[INFO] [stderr] 10 |     pub msg: String,
[INFO] [stderr] 11 |     backtrace: Option<std::backtrace::Backtrace>,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `ToucanError` 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] 
[INFO] [stderr] warning: `toucan-rs` (lib) generated 1 warning
[INFO] [stderr] warning: `toucan-rs` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/toucan_rs-ee7854ce1d71a314)
[INFO] [stderr]    Doc-tests toucan_rs
[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" "f2f04bcbb7b03af6e2b99efdde26a98f25ed2d470126859859906e66fded6e72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2f04bcbb7b03af6e2b99efdde26a98f25ed2d470126859859906e66fded6e72", kill_on_drop: false }`
[INFO] [stdout] f2f04bcbb7b03af6e2b99efdde26a98f25ed2d470126859859906e66fded6e72