[INFO] fetching crate tayvo_optional_struct 0.2.0...
[INFO] testing tayvo_optional_struct-0.2.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate tayvo_optional_struct 0.2.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate tayvo_optional_struct 0.2.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate tayvo_optional_struct 0.2.0
[INFO] tweaked toml for crates.io crate tayvo_optional_struct 0.2.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tayvo_optional_struct 0.2.0 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] crate crates.io crate tayvo_optional_struct 0.2.0 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-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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 63d081497301d4c240a3c7fad0660bbf6f1ec9e50f044c52dca05df7df5c18d9
[INFO] running `Command { std: "docker" "start" "-a" "63d081497301d4c240a3c7fad0660bbf6f1ec9e50f044c52dca05df7df5c18d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63d081497301d4c240a3c7fad0660bbf6f1ec9e50f044c52dca05df7df5c18d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63d081497301d4c240a3c7fad0660bbf6f1ec9e50f044c52dca05df7df5c18d9", kill_on_drop: false }`
[INFO] [stdout] 63d081497301d4c240a3c7fad0660bbf6f1ec9e50f044c52dca05df7df5c18d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 23b2527ed0eee5f591dc725268485083eee85e7b877e5a0f23c22f3ea10cd6b8
[INFO] running `Command { std: "docker" "start" "-a" "23b2527ed0eee5f591dc725268485083eee85e7b877e5a0f23c22f3ea10cd6b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling tayvo_optional_struct v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.12s
[INFO] running `Command { std: "docker" "inspect" "23b2527ed0eee5f591dc725268485083eee85e7b877e5a0f23c22f3ea10cd6b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23b2527ed0eee5f591dc725268485083eee85e7b877e5a0f23c22f3ea10cd6b8", kill_on_drop: false }`
[INFO] [stdout] 23b2527ed0eee5f591dc725268485083eee85e7b877e5a0f23c22f3ea10cd6b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 9e3eb850d2fe3d8f29dec9e782313add2a6dcfdf3434fccdc588f66c7a37a8bc
[INFO] running `Command { std: "docker" "start" "-a" "9e3eb850d2fe3d8f29dec9e782313add2a6dcfdf3434fccdc588f66c7a37a8bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling serde_json v1.0.143
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling tayvo_optional_struct v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stdout] error[E0463]: can't find crate for `optional_struct`
[INFO] [stdout]  --> tests/simple.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate optional_struct;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `optional_struct`
[INFO] [stdout]  --> tests/nested.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate optional_struct;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `optional_struct`
[INFO] [stdout]  --> tests/empty.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | extern crate optional_struct;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tayvo_optional_struct` (test "simple") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0463]: can't find crate for `optional_struct`
[INFO] [stdout]  --> tests/derive.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate optional_struct;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tayvo_optional_struct` (test "nested") due to 1 previous error
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `optional_struct`
[INFO] [stdout]  --> tests/renamed.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate optional_struct;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tayvo_optional_struct` (test "derive") due to 1 previous error
[INFO] [stderr] error: could not compile `tayvo_optional_struct` (test "empty") due to 1 previous error
[INFO] [stderr] error: could not compile `tayvo_optional_struct` (test "renamed") due to 1 previous error
[INFO] [stdout] error[E0463]: can't find crate for `optional_struct`
[INFO] [stdout]  --> tests/generics.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate optional_struct;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tayvo_optional_struct` (test "generics") due to 1 previous error
[INFO] [stdout] error[E0463]: can't find crate for `optional_struct`
[INFO] [stdout]  --> tests/serde.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate optional_struct;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `optional_struct`
[INFO] [stdout]  --> tests/simple_no_overrides.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate optional_struct;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tayvo_optional_struct` (test "simple_no_overrides") due to 1 previous error
[INFO] [stderr] error: could not compile `tayvo_optional_struct` (test "serde") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "9e3eb850d2fe3d8f29dec9e782313add2a6dcfdf3434fccdc588f66c7a37a8bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e3eb850d2fe3d8f29dec9e782313add2a6dcfdf3434fccdc588f66c7a37a8bc", kill_on_drop: false }`
[INFO] [stdout] 9e3eb850d2fe3d8f29dec9e782313add2a6dcfdf3434fccdc588f66c7a37a8bc
