[INFO] fetching crate thin-string 0.3.0...
[INFO] testing thin-string-0.3.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate thin-string 0.3.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate thin-string 0.3.0
[INFO] finished tweaking crates.io crate thin-string 0.3.0
[INFO] tweaked toml for crates.io crate thin-string 0.3.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate thin-string 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 8 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] c57701eca41c1db22587a8c3b1fe563a3103bbda7fa1f5ec591403957f00c406
[INFO] running `Command { std: "docker" "start" "-a" "c57701eca41c1db22587a8c3b1fe563a3103bbda7fa1f5ec591403957f00c406", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c57701eca41c1db22587a8c3b1fe563a3103bbda7fa1f5ec591403957f00c406", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c57701eca41c1db22587a8c3b1fe563a3103bbda7fa1f5ec591403957f00c406", kill_on_drop: false }`
[INFO] [stdout] c57701eca41c1db22587a8c3b1fe563a3103bbda7fa1f5ec591403957f00c406
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] fe7ad093d31b195820bbe134867be8672ca9983ff83ba8f9e79a931ffe8c1c26
[INFO] running `Command { std: "docker" "start" "-a" "fe7ad093d31b195820bbe134867be8672ca9983ff83ba8f9e79a931ffe8c1c26", kill_on_drop: false }`
[INFO] [stderr]    Compiling thin-vec v0.2.16
[INFO] [stderr]    Compiling thin-string v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/lib.rs:891:5
[INFO] [stdout]     |
[INFO] [stdout] 891 |     default fn to_thin_string(&self) -> ThinString {
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "fe7ad093d31b195820bbe134867be8672ca9983ff83ba8f9e79a931ffe8c1c26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe7ad093d31b195820bbe134867be8672ca9983ff83ba8f9e79a931ffe8c1c26", kill_on_drop: false }`
[INFO] [stdout] fe7ad093d31b195820bbe134867be8672ca9983ff83ba8f9e79a931ffe8c1c26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 50c39ee6322855b90c55074d9c0262ef625be87cc239c55705b2a103b9a0302b
[INFO] running `Command { std: "docker" "start" "-a" "50c39ee6322855b90c55074d9c0262ef625be87cc239c55705b2a103b9a0302b", kill_on_drop: false }`
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/lib.rs:891:5
[INFO] [stdout]     |
[INFO] [stdout] 891 |     default fn to_thin_string(&self) -> ThinString {
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling thin-string v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/lib.rs:891:5
[INFO] [stdout]     |
[INFO] [stdout] 891 |     default fn to_thin_string(&self) -> ThinString {
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "50c39ee6322855b90c55074d9c0262ef625be87cc239c55705b2a103b9a0302b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50c39ee6322855b90c55074d9c0262ef625be87cc239c55705b2a103b9a0302b", kill_on_drop: false }`
[INFO] [stdout] 50c39ee6322855b90c55074d9c0262ef625be87cc239c55705b2a103b9a0302b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 46215826e31b3785da66889c2ac513b6c1f2bc50d58126c1eae5bc94b5744f6c
[INFO] running `Command { std: "docker" "start" "-a" "46215826e31b3785da66889c2ac513b6c1f2bc50d58126c1eae5bc94b5744f6c", kill_on_drop: false }`
[INFO] [stderr] warning: specialization is experimental
[INFO] [stderr]    --> src/lib.rs:891:5
[INFO] [stderr]     |
[INFO] [stderr] 891 |     default fn to_thin_string(&self) -> ThinString {
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stderr]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stderr]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stderr] 
[INFO] [stderr] warning: `thin-string` (lib) generated 1 warning
[INFO] [stderr] warning: `thin-string` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/thin_string-d916f9150312a661)
[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] [stderr]    Doc-tests thin_string
[INFO] [stderr] warning: specialization is experimental
[INFO] [stderr]    --> src/lib.rs:891:5
[INFO] [stderr]     |
[INFO] [stderr] 891 |     default fn to_thin_string(&self) -> ThinString {
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stderr]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stderr]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[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" "46215826e31b3785da66889c2ac513b6c1f2bc50d58126c1eae5bc94b5744f6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46215826e31b3785da66889c2ac513b6c1f2bc50d58126c1eae5bc94b5744f6c", kill_on_drop: false }`
[INFO] [stdout] 46215826e31b3785da66889c2ac513b6c1f2bc50d58126c1eae5bc94b5744f6c
