[INFO] fetching crate serde_rec 0.1.0...
[INFO] testing serde_rec-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate serde_rec 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate serde_rec 0.1.0
[INFO] finished tweaking crates.io crate serde_rec 0.1.0
[INFO] tweaked toml for crates.io crate serde_rec 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_rec 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] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[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] 6d683bb0c43e169fc53ad2ca8003c1645037545243f5037ab38fa40ff13671ff
[INFO] running `Command { std: "docker" "start" "-a" "6d683bb0c43e169fc53ad2ca8003c1645037545243f5037ab38fa40ff13671ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d683bb0c43e169fc53ad2ca8003c1645037545243f5037ab38fa40ff13671ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d683bb0c43e169fc53ad2ca8003c1645037545243f5037ab38fa40ff13671ff", kill_on_drop: false }`
[INFO] [stdout] 6d683bb0c43e169fc53ad2ca8003c1645037545243f5037ab38fa40ff13671ff
[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] 0dd2c47f66eefe85c40701c3b5050eee0b83163c3501c8d15a9c58aee420e8ae
[INFO] running `Command { std: "docker" "start" "-a" "0dd2c47f66eefe85c40701c3b5050eee0b83163c3501c8d15a9c58aee420e8ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_rec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `length` is never read
[INFO] [stdout]    --> src/ser.rs:227:5
[INFO] [stdout]     |
[INFO] [stdout] 224 | pub struct SerializerSeq<'a, 'b> {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 227 |     length: usize,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SerializerSeq` 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 8.38s
[INFO] running `Command { std: "docker" "inspect" "0dd2c47f66eefe85c40701c3b5050eee0b83163c3501c8d15a9c58aee420e8ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dd2c47f66eefe85c40701c3b5050eee0b83163c3501c8d15a9c58aee420e8ae", kill_on_drop: false }`
[INFO] [stdout] 0dd2c47f66eefe85c40701c3b5050eee0b83163c3501c8d15a9c58aee420e8ae
[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] 794003e8b99be9bd9ebd67be44e18b1158adc7238ae24d48a452c8f75ff99747
[INFO] running `Command { std: "docker" "start" "-a" "794003e8b99be9bd9ebd67be44e18b1158adc7238ae24d48a452c8f75ff99747", kill_on_drop: false }`
[INFO] [stdout] warning: field `length` is never read
[INFO] [stdout]    --> src/ser.rs:227:5
[INFO] [stdout]     |
[INFO] [stdout] 224 | pub struct SerializerSeq<'a, 'b> {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 227 |     length: usize,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SerializerSeq` 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]    Compiling serde_rec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `length` is never read
[INFO] [stdout]    --> src/ser.rs:227:5
[INFO] [stdout]     |
[INFO] [stdout] 224 | pub struct SerializerSeq<'a, 'b> {
[INFO] [stdout]     |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 227 |     length: usize,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SerializerSeq` 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 0.49s
[INFO] running `Command { std: "docker" "inspect" "794003e8b99be9bd9ebd67be44e18b1158adc7238ae24d48a452c8f75ff99747", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "794003e8b99be9bd9ebd67be44e18b1158adc7238ae24d48a452c8f75ff99747", kill_on_drop: false }`
[INFO] [stdout] 794003e8b99be9bd9ebd67be44e18b1158adc7238ae24d48a452c8f75ff99747
[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] be20a94b6c9cc871ac0abca6998f92c8ce85f159bdb8e35f6b4db3987416033e
[INFO] running `Command { std: "docker" "start" "-a" "be20a94b6c9cc871ac0abca6998f92c8ce85f159bdb8e35f6b4db3987416033e", kill_on_drop: false }`
[INFO] [stderr] warning: field `length` is never read
[INFO] [stderr]    --> src/ser.rs:227:5
[INFO] [stderr]     |
[INFO] [stderr] 224 | pub struct SerializerSeq<'a, 'b> {
[INFO] [stderr]     |            ------------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 227 |     length: usize,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `SerializerSeq` 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: `serde_rec` (lib) generated 1 warning
[INFO] [stderr] warning: `serde_rec` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/serde_rec-a4f2059dd0028459)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test ser::tests::test_basic ... ok
[INFO] [stdout] test ser::tests::test_vec ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests serde_rec
[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" "be20a94b6c9cc871ac0abca6998f92c8ce85f159bdb8e35f6b4db3987416033e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be20a94b6c9cc871ac0abca6998f92c8ce85f159bdb8e35f6b4db3987416033e", kill_on_drop: false }`
[INFO] [stdout] be20a94b6c9cc871ac0abca6998f92c8ce85f159bdb8e35f6b4db3987416033e
