[INFO] fetching crate shrink-to-fit 0.2.10...
[INFO] testing shrink-to-fit-0.2.10 against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] extracting crate shrink-to-fit 0.2.10 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate shrink-to-fit 0.2.10
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate shrink-to-fit 0.2.10
[INFO] tweaked toml for crates.io crate shrink-to-fit 0.2.10 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate shrink-to-fit 0.2.10 on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "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" "+33835004928d3bf65db4d4712e1330766263b0bd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages to latest compatible versions
[INFO] [stderr]       Adding hashbrown v0.15.5 (available: v0.17.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3cca11d9b15d13de22d4bbe81de3f09b44cb1dc4778be549f4bad282326c725c
[INFO] running `Command { std: "docker" "start" "-a" "3cca11d9b15d13de22d4bbe81de3f09b44cb1dc4778be549f4bad282326c725c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3cca11d9b15d13de22d4bbe81de3f09b44cb1dc4778be549f4bad282326c725c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cca11d9b15d13de22d4bbe81de3f09b44cb1dc4778be549f4bad282326c725c", kill_on_drop: false }`
[INFO] [stdout] 3cca11d9b15d13de22d4bbe81de3f09b44cb1dc4778be549f4bad282326c725c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec5438f264b129cef30fd78b9cc7b83b3f7cf180f8263db941d59701366b45ff
[INFO] running `Command { std: "docker" "start" "-a" "ec5438f264b129cef30fd78b9cc7b83b3f7cf180f8263db941d59701366b45ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling shrink-to-fit-macro v0.2.5
[INFO] [stderr]    Compiling shrink-to-fit v0.2.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]   --> src/maybe.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     default fn may_shrink_to_fit(&mut self) {}
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-04-24; consider upgrading it if it is out of date
[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 0.63s
[INFO] running `Command { std: "docker" "inspect" "ec5438f264b129cef30fd78b9cc7b83b3f7cf180f8263db941d59701366b45ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec5438f264b129cef30fd78b9cc7b83b3f7cf180f8263db941d59701366b45ff", kill_on_drop: false }`
[INFO] [stdout] ec5438f264b129cef30fd78b9cc7b83b3f7cf180f8263db941d59701366b45ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1424f8d311e6b167ad92fe8c145d624ca4534f01afae32a54104385452525aef
[INFO] running `Command { std: "docker" "start" "-a" "1424f8d311e6b167ad92fe8c145d624ca4534f01afae32a54104385452525aef", kill_on_drop: false }`
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]   --> src/maybe.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     default fn may_shrink_to_fit(&mut self) {}
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-04-24; consider upgrading it if it is out of date
[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 shrink-to-fit v0.2.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]   --> src/maybe.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     default fn may_shrink_to_fit(&mut self) {}
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2026-04-24; consider upgrading it if it is out of date
[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 0.48s
[INFO] running `Command { std: "docker" "inspect" "1424f8d311e6b167ad92fe8c145d624ca4534f01afae32a54104385452525aef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1424f8d311e6b167ad92fe8c145d624ca4534f01afae32a54104385452525aef", kill_on_drop: false }`
[INFO] [stdout] 1424f8d311e6b167ad92fe8c145d624ca4534f01afae32a54104385452525aef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a4a7bbe4dd98650d52da8edcaaa9a8cb6d57159984817e5fb13ddf87fe65186b
[INFO] running `Command { std: "docker" "start" "-a" "a4a7bbe4dd98650d52da8edcaaa9a8cb6d57159984817e5fb13ddf87fe65186b", kill_on_drop: false }`
[INFO] [stderr] warning: specialization is experimental
[INFO] [stderr]   --> src/maybe.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     default fn may_shrink_to_fit(&mut self) {}
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stderr]    = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stderr]    = note: this compiler was built on 2026-04-24; consider upgrading it if it is out of date
[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: `shrink-to-fit` (lib) generated 1 warning
[INFO] [stderr] warning: `shrink-to-fit` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/shrink_to_fit-b2e9d188ff9e2e7f)
[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] [stderr]      Running tests/derive.rs (/opt/rustwide/target/debug/deps/derive-69a7dfc2fc17e708)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stderr]    Doc-tests shrink_to_fit
[INFO] [stdout] test test_auto_deref_specialization ... ok
[INFO] [stdout] test test_shrink_to_fit ... ok
[INFO] [stdout] test test_arg_check ... 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] warning: specialization is experimental
[INFO] [stderr]   --> src/maybe.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     default fn may_shrink_to_fit(&mut self) {}
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stderr]    = help: add `#![feature(specialization)]` to the crate attributes to enable
[INFO] [stderr]    = note: this compiler was built on 2026-04-24; consider upgrading it if it is out of date
[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 1 test
[INFO] [stdout] test src/lib.rs - (line 8) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.26s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a4a7bbe4dd98650d52da8edcaaa9a8cb6d57159984817e5fb13ddf87fe65186b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4a7bbe4dd98650d52da8edcaaa9a8cb6d57159984817e5fb13ddf87fe65186b", kill_on_drop: false }`
[INFO] [stdout] a4a7bbe4dd98650d52da8edcaaa9a8cb6d57159984817e5fb13ddf87fe65186b
