[INFO] fetching crate singleton-cell 0.3.1...
[INFO] testing singleton-cell-0.3.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate singleton-cell 0.3.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate singleton-cell 0.3.1
[INFO] finished tweaking crates.io crate singleton-cell 0.3.1
[INFO] tweaked toml for crates.io crate singleton-cell 0.3.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate singleton-cell 0.3.1 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 singleton-cell 0.3.1 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] 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] 74c167b3539623b4e177eade13ed1c74903f210bdd215d8ca2b229bc39f30aff
[INFO] running `Command { std: "docker" "start" "-a" "74c167b3539623b4e177eade13ed1c74903f210bdd215d8ca2b229bc39f30aff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74c167b3539623b4e177eade13ed1c74903f210bdd215d8ca2b229bc39f30aff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74c167b3539623b4e177eade13ed1c74903f210bdd215d8ca2b229bc39f30aff", kill_on_drop: false }`
[INFO] [stdout] 74c167b3539623b4e177eade13ed1c74903f210bdd215d8ca2b229bc39f30aff
[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] 07bdaf1ef11991d3a2d45105ebc1b6e9838c45c7f8a0c8d56c46bc06459b9baa
[INFO] running `Command { std: "docker" "start" "-a" "07bdaf1ef11991d3a2d45105ebc1b6e9838c45c7f8a0c8d56c46bc06459b9baa", kill_on_drop: false }`
[INFO] [stderr]    Compiling singleton-trait v0.3.0
[INFO] [stderr]    Compiling paste v1.0.7
[INFO] [stderr]    Compiling singleton-cell v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "07bdaf1ef11991d3a2d45105ebc1b6e9838c45c7f8a0c8d56c46bc06459b9baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07bdaf1ef11991d3a2d45105ebc1b6e9838c45c7f8a0c8d56c46bc06459b9baa", kill_on_drop: false }`
[INFO] [stdout] 07bdaf1ef11991d3a2d45105ebc1b6e9838c45c7f8a0c8d56c46bc06459b9baa
[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] 312af0c40a996b56a4c24e94b1345329ba5892e5c6e2e649fd9682b39d451bbc
[INFO] running `Command { std: "docker" "start" "-a" "312af0c40a996b56a4c24e94b1345329ba5892e5c6e2e649fd9682b39d451bbc", kill_on_drop: false }`
[INFO] [stderr]    Compiling singleton-cell v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate as singleton_cell`
[INFO] [stdout]    --> src/lib.rs:351:9
[INFO] [stdout]     |
[INFO] [stdout] 351 |     use crate as singleton_cell;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lib.rs:400:30
[INFO] [stdout]     |
[INFO] [stdout] 400 |             struct Local<'a>(&'a ());
[INFO] [stdout]     |                    -----     ^^^^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_erased` is never used
[INFO] [stdout]    --> src/lib.rs:333:24
[INFO] [stdout]     |
[INFO] [stdout] 303 |                 impl $Name {
[INFO] [stdout]     |                 ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 333 |                     fn new_erased() -> Option<$crate::Erased<Self>> {
[INFO] [stdout]     |                        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 422 |         new_singleton!(pub A);
[INFO] [stdout]     |         --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `new_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_erased` is never used
[INFO] [stdout]    --> src/lib.rs:333:24
[INFO] [stdout]     |
[INFO] [stdout] 303 |                 impl $Name {
[INFO] [stdout]     |                 ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 333 |                     fn new_erased() -> Option<$crate::Erased<Self>> {
[INFO] [stdout]     |                        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 429 |         new_singleton!(pub A);
[INFO] [stdout]     |         --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `new_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_erased` is never used
[INFO] [stdout]    --> src/lib.rs:333:24
[INFO] [stdout]     |
[INFO] [stdout] 303 |                 impl $Name {
[INFO] [stdout]     |                 ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 333 |                     fn new_erased() -> Option<$crate::Erased<Self>> {
[INFO] [stdout]     |                        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 430 |         new_singleton!(pub B);
[INFO] [stdout]     |         --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `new_singleton` (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 0.30s
[INFO] running `Command { std: "docker" "inspect" "312af0c40a996b56a4c24e94b1345329ba5892e5c6e2e649fd9682b39d451bbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "312af0c40a996b56a4c24e94b1345329ba5892e5c6e2e649fd9682b39d451bbc", kill_on_drop: false }`
[INFO] [stdout] 312af0c40a996b56a4c24e94b1345329ba5892e5c6e2e649fd9682b39d451bbc
[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] bdddcaf62c6dad0fae4795dde59f44176e46cd4954a9228b57b2fb6e08fde05e
[INFO] running `Command { std: "docker" "start" "-a" "bdddcaf62c6dad0fae4795dde59f44176e46cd4954a9228b57b2fb6e08fde05e", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `crate as singleton_cell`
[INFO] [stderr]    --> src/lib.rs:351:9
[INFO] [stderr]     |
[INFO] [stderr] 351 |     use crate as singleton_cell;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]    --> src/lib.rs:400:30
[INFO] [stderr]     |
[INFO] [stderr] 400 |             struct Local<'a>(&'a ());
[INFO] [stderr]     |                    -----     ^^^^^^
[INFO] [stderr]     |                    |
[INFO] [stderr]     |                    field in this struct
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider removing this field
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new_erased` is never used
[INFO] [stderr]    --> src/lib.rs:333:24
[INFO] [stderr]     |
[INFO] [stderr] 303 |                 impl $Name {
[INFO] [stderr]     |                 ---------- associated function in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 333 |                     fn new_erased() -> Option<$crate::Erased<Self>> {
[INFO] [stderr]     |                        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 422 |         new_singleton!(pub A);
[INFO] [stderr]     |         --------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `new_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new_erased` is never used
[INFO] [stderr]    --> src/lib.rs:333:24
[INFO] [stderr]     |
[INFO] [stderr] 303 |                 impl $Name {
[INFO] [stderr]     |                 ---------- associated function in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 333 |                     fn new_erased() -> Option<$crate::Erased<Self>> {
[INFO] [stderr]     |                        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 429 |         new_singleton!(pub A);
[INFO] [stderr]     |         --------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `new_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new_erased` is never used
[INFO] [stderr]    --> src/lib.rs:333:24
[INFO] [stderr]     |
[INFO] [stderr] 303 |                 impl $Name {
[INFO] [stderr]     |                 ---------- associated function in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 333 |                     fn new_erased() -> Option<$crate::Erased<Self>> {
[INFO] [stderr]     |                        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 430 |         new_singleton!(pub B);
[INFO] [stderr]     |         --------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in the macro `new_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `singleton-cell` (lib test) generated 5 warnings (run `cargo fix --lib -p singleton-cell --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/singleton_cell-901506853a45a5ee)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::ghost_read_after_write ... ok
[INFO] [stdout] test tests::global_singleton_distinct ... ok
[INFO] [stdout] test tests::global_singleton_unique ... ok
[INFO] [stdout] test tests::local_type_round_trip ... ok
[INFO] [stdout] test tests::ghost_trivial ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests singleton_cell
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - new_singleton (line 269) ... ok
[INFO] [stdout] test src/lib.rs - with_token (line 239) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.46s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bdddcaf62c6dad0fae4795dde59f44176e46cd4954a9228b57b2fb6e08fde05e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdddcaf62c6dad0fae4795dde59f44176e46cd4954a9228b57b2fb6e08fde05e", kill_on_drop: false }`
[INFO] [stdout] bdddcaf62c6dad0fae4795dde59f44176e46cd4954a9228b57b2fb6e08fde05e
