[INFO] fetching crate rsubstitute_core 0.1.0...
[INFO] testing rsubstitute_core-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate rsubstitute_core 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate rsubstitute_core 0.1.0
[INFO] finished tweaking crates.io crate rsubstitute_core 0.1.0
[INFO] tweaked toml for crates.io crate rsubstitute_core 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rsubstitute_core 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] crate crates.io crate rsubstitute_core 0.1.0 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] [stderr]     Blocking waiting for file lock on package cache
[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] 615b005ef7446a0c4ede78e75258806c52f38cc0577582baa665af3e90c30120
[INFO] running `Command { std: "docker" "start" "-a" "615b005ef7446a0c4ede78e75258806c52f38cc0577582baa665af3e90c30120", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "615b005ef7446a0c4ede78e75258806c52f38cc0577582baa665af3e90c30120", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "615b005ef7446a0c4ede78e75258806c52f38cc0577582baa665af3e90c30120", kill_on_drop: false }`
[INFO] [stdout] 615b005ef7446a0c4ede78e75258806c52f38cc0577582baa665af3e90c30120
[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] 784fdae2048fe4bb4dec56a3167a8ede11ac48b01bd5c6fd23b3312e88c6fed7
[INFO] running `Command { std: "docker" "start" "-a" "784fdae2048fe4bb4dec56a3167a8ede11ac48b01bd5c6fd23b3312e88c6fed7", kill_on_drop: false }`
[INFO] [stderr]    Compiling rsubstitute_core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]   --> src/args/arg_printer.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         default fn debug_string(&self) -> String {
[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 0.85s
[INFO] running `Command { std: "docker" "inspect" "784fdae2048fe4bb4dec56a3167a8ede11ac48b01bd5c6fd23b3312e88c6fed7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "784fdae2048fe4bb4dec56a3167a8ede11ac48b01bd5c6fd23b3312e88c6fed7", kill_on_drop: false }`
[INFO] [stdout] 784fdae2048fe4bb4dec56a3167a8ede11ac48b01bd5c6fd23b3312e88c6fed7
[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] 57aaf018b399852f3298d781f7fdf0f1f95903f6d8fa5ffb05a1dd536a05a3ca
[INFO] running `Command { std: "docker" "start" "-a" "57aaf018b399852f3298d781f7fdf0f1f95903f6d8fa5ffb05a1dd536a05a3ca", kill_on_drop: false }`
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]   --> src/args/arg_printer.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         default fn debug_string(&self) -> String {
[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 rsubstitute_core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]   --> src/args/arg_printer.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |         default fn debug_string(&self) -> String {
[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 0.48s
[INFO] running `Command { std: "docker" "inspect" "57aaf018b399852f3298d781f7fdf0f1f95903f6d8fa5ffb05a1dd536a05a3ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57aaf018b399852f3298d781f7fdf0f1f95903f6d8fa5ffb05a1dd536a05a3ca", kill_on_drop: false }`
[INFO] [stdout] 57aaf018b399852f3298d781f7fdf0f1f95903f6d8fa5ffb05a1dd536a05a3ca
[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] 1c311989cd45ab0327edee6760f9e1439ee85516b55eb63c92535eeb40c67bc4
[INFO] running `Command { std: "docker" "start" "-a" "1c311989cd45ab0327edee6760f9e1439ee85516b55eb63c92535eeb40c67bc4", kill_on_drop: false }`
[INFO] [stderr] warning: specialization is experimental
[INFO] [stderr]   --> src/args/arg_printer.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |         default fn debug_string(&self) -> String {
[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: `rsubstitute_core` (lib) generated 1 warning
[INFO] [stderr] warning: `rsubstitute_core` (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/rsubstitute_core-af1abff63a770052)
[INFO] [stderr]    Doc-tests rsubstitute_core
[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] warning: specialization is experimental
[INFO] [stderr]   --> src/args/arg_printer.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |         default fn debug_string(&self) -> String {
[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 1 test
[INFO] [stdout] test src/lifetimes_transmutation.rs - lifetimes_transmutation::transmute_lifetime (line 35) ... ignored
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lifetimes_transmutation.rs - lifetimes_transmutation::transmute_lifetime (line 24) ... ignored
[INFO] [stdout] test src/lifetimes_transmutation.rs - lifetimes_transmutation::transmute_lifetime (line 42) ... ignored
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 2 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] all doctests ran in 0.35s; merged doctests compilation took 0.34s
[INFO] running `Command { std: "docker" "inspect" "1c311989cd45ab0327edee6760f9e1439ee85516b55eb63c92535eeb40c67bc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c311989cd45ab0327edee6760f9e1439ee85516b55eb63c92535eeb40c67bc4", kill_on_drop: false }`
[INFO] [stdout] 1c311989cd45ab0327edee6760f9e1439ee85516b55eb63c92535eeb40c67bc4
