[INFO] fetching crate swimmer 0.3.0...
[INFO] testing swimmer-0.3.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate swimmer 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate swimmer 0.3.0
[INFO] finished tweaking crates.io crate swimmer 0.3.0
[INFO] tweaked toml for crates.io crate swimmer 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate swimmer 0.3.0 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 69 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.2.11 (available: v0.8.2)
[INFO] [stderr]       Adding hashbrown v0.6.3 (available: v0.17.0)
[INFO] [stderr]       Adding smallvec v0.6.14 (available: v1.15.1)
[INFO] [stderr]       Adding static_assertions v0.3.4 (available: v1.1.0)
[INFO] [stderr]       Adding thread_local v0.3.6 (available: v1.1.9)
[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-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc90916c356f8b96097a5c7b0929a4e299fbbb628c161a5170a6b6144e731142
[INFO] running `Command { std: "docker" "start" "-a" "cc90916c356f8b96097a5c7b0929a4e299fbbb628c161a5170a6b6144e731142", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc90916c356f8b96097a5c7b0929a4e299fbbb628c161a5170a6b6144e731142", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc90916c356f8b96097a5c7b0929a4e299fbbb628c161a5170a6b6144e731142", kill_on_drop: false }`
[INFO] [stdout] cc90916c356f8b96097a5c7b0929a4e299fbbb628c161a5170a6b6144e731142
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c74140fef7d9b65770f152c12f0378f33bb552d745be70424f107aa3d636378
[INFO] running `Command { std: "docker" "start" "-a" "1c74140fef7d9b65770f152c12f0378f33bb552d745be70424f107aa3d636378", kill_on_drop: false }`
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling swimmer v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:258:16
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn get(&self) -> Recycled<T> {
[INFO] [stdout]     |                ^^^^^     ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn get(&self) -> Recycled<'_, T> {
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:310:19
[INFO] [stdout]     |
[INFO] [stdout] 310 |     pub fn attach(&self, value: T) -> Recycled<T> {
[INFO] [stdout]     |                   ^^^^^               ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 310 |     pub fn attach(&self, value: T) -> Recycled<'_, T> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "1c74140fef7d9b65770f152c12f0378f33bb552d745be70424f107aa3d636378", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c74140fef7d9b65770f152c12f0378f33bb552d745be70424f107aa3d636378", kill_on_drop: false }`
[INFO] [stdout] 1c74140fef7d9b65770f152c12f0378f33bb552d745be70424f107aa3d636378
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c88f6debe1a6691c004398e3814bdca70430071266358dde6c4d119a7eb98f36
[INFO] running `Command { std: "docker" "start" "-a" "c88f6debe1a6691c004398e3814bdca70430071266358dde6c4d119a7eb98f36", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]    Compiling rand_xoshiro v0.1.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling static_assertions v0.3.4
[INFO] [stderr]    Compiling lifeguard v0.6.1
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:258:16
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn get(&self) -> Recycled<T> {
[INFO] [stdout]     |                ^^^^^     ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn get(&self) -> Recycled<'_, T> {
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:310:19
[INFO] [stdout]     |
[INFO] [stdout] 310 |     pub fn attach(&self, value: T) -> Recycled<T> {
[INFO] [stdout]     |                   ^^^^^               ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 310 |     pub fn attach(&self, value: T) -> Recycled<'_, T> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling csv v1.4.0
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling criterion-plot v0.3.1
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.2.11
[INFO] [stderr]    Compiling swimmer v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:258:16
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn get(&self) -> Recycled<T> {
[INFO] [stdout]     |                ^^^^^     ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 258 |     pub fn get(&self) -> Recycled<'_, T> {
[INFO] [stdout]     |                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:310:19
[INFO] [stdout]     |
[INFO] [stdout] 310 |     pub fn attach(&self, value: T) -> Recycled<T> {
[INFO] [stdout]     |                   ^^^^^               ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 310 |     pub fn attach(&self, value: T) -> Recycled<'_, T> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 11.53s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.2.11
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "c88f6debe1a6691c004398e3814bdca70430071266358dde6c4d119a7eb98f36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c88f6debe1a6691c004398e3814bdca70430071266358dde6c4d119a7eb98f36", kill_on_drop: false }`
[INFO] [stdout] c88f6debe1a6691c004398e3814bdca70430071266358dde6c4d119a7eb98f36
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3af128617074d6476f45f8eb109103d805c0acc13821ffd212255fe5647a5723
[INFO] running `Command { std: "docker" "start" "-a" "3af128617074d6476f45f8eb109103d805c0acc13821ffd212255fe5647a5723", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/lib.rs:258:16
[INFO] [stderr]     |
[INFO] [stderr] 258 |     pub fn get(&self) -> Recycled<T> {
[INFO] [stderr]     |                ^^^^^     ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                |
[INFO] [stderr]     |                the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 258 |     pub fn get(&self) -> Recycled<'_, T> {
[INFO] [stderr]     |                                   +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/lib.rs:310:19
[INFO] [stderr]     |
[INFO] [stderr] 310 |     pub fn attach(&self, value: T) -> Recycled<T> {
[INFO] [stderr]     |                   ^^^^^               ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 310 |     pub fn attach(&self, value: T) -> Recycled<'_, T> {
[INFO] [stderr]     |                                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: `swimmer` (lib) generated 2 warnings (run `cargo fix --lib -p swimmer` to apply 2 suggestions)
[INFO] [stderr] warning: `swimmer` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.2.11
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/swimmer-41b145884fc9b6ce)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::test_builder ... ok
[INFO] [stdout] test tests::test_pool_send_and_sync ... ok
[INFO] [stdout] test tests::test_supplier ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/existing_pool.rs (/opt/rustwide/target/debug/deps/existing_pool-1e42e6f4ed710f43)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test existing_pool_full ... ok
[INFO] [stderr]      Running tests/static_pool.rs (/opt/rustwide/target/debug/deps/static_pool-c709a1041db77a5c)
[INFO] [stdout] test existing_pool_partial ... ok
[INFO] [stderr]    Doc-tests swimmer
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test lazy_static_pool ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test src/lib.rs - Pool<T>::new (line 218) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::detached (line 324) ... ok
[INFO] [stdout] test src/lib.rs - (line 168) ... ok
[INFO] [stdout] test src/lib.rs - (line 69) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::attach (line 295) ... ok
[INFO] [stdout] test src/lib.rs - (line 128) ... ok
[INFO] [stdout] test src/lib.rs - (line 92) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::get (line 251) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::with_size (line 235) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::size (line 274) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.75s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3af128617074d6476f45f8eb109103d805c0acc13821ffd212255fe5647a5723", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3af128617074d6476f45f8eb109103d805c0acc13821ffd212255fe5647a5723", kill_on_drop: false }`
[INFO] [stdout] 3af128617074d6476f45f8eb109103d805c0acc13821ffd212255fe5647a5723
