[INFO] fetching crate tailcall 2.3.0...
[INFO] testing tailcall-2.3.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate tailcall 2.3.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate tailcall 2.3.0
[INFO] finished tweaking crates.io crate tailcall 2.3.0
[INFO] tweaked toml for crates.io crate tailcall 2.3.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tailcall 2.3.0 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] crate crates.io crate tailcall 2.3.0 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] 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] fa7ac4d6fb37171a528431ecae69404d4daddb436c8af132a4c94bd138df3385
[INFO] running `Command { std: "docker" "start" "-a" "fa7ac4d6fb37171a528431ecae69404d4daddb436c8af132a4c94bd138df3385", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa7ac4d6fb37171a528431ecae69404d4daddb436c8af132a4c94bd138df3385", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa7ac4d6fb37171a528431ecae69404d4daddb436c8af132a4c94bd138df3385", kill_on_drop: false }`
[INFO] [stdout] fa7ac4d6fb37171a528431ecae69404d4daddb436c8af132a4c94bd138df3385
[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] c67543e90d1e1d8f3e78fcc018d65548114c1ef962173c7fa6e0aea0b1ceb34d
[INFO] running `Command { std: "docker" "start" "-a" "c67543e90d1e1d8f3e78fcc018d65548114c1ef962173c7fa6e0aea0b1ceb34d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling tailcall-impl v2.3.0
[INFO] [stderr]    Compiling tailcall v2.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.15s
[INFO] running `Command { std: "docker" "inspect" "c67543e90d1e1d8f3e78fcc018d65548114c1ef962173c7fa6e0aea0b1ceb34d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c67543e90d1e1d8f3e78fcc018d65548114c1ef962173c7fa6e0aea0b1ceb34d", kill_on_drop: false }`
[INFO] [stdout] c67543e90d1e1d8f3e78fcc018d65548114c1ef962173c7fa6e0aea0b1ceb34d
[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] 45a2e63598a4408be6045bc90736ee51d1b95c17507dee261a61209bc656990f
[INFO] running `Command { std: "docker" "start" "-a" "45a2e63598a4408be6045bc90736ee51d1b95c17507dee261a61209bc656990f", kill_on_drop: false }`
[INFO] [stderr]    Compiling tailcall v2.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "45a2e63598a4408be6045bc90736ee51d1b95c17507dee261a61209bc656990f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45a2e63598a4408be6045bc90736ee51d1b95c17507dee261a61209bc656990f", kill_on_drop: false }`
[INFO] [stdout] 45a2e63598a4408be6045bc90736ee51d1b95c17507dee261a61209bc656990f
[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] 8fd97bbb8f3871b94e41b3d78df6b67534eb20f62f75dfc2bdfe5c2257daf9bc
[INFO] running `Command { std: "docker" "start" "-a" "8fd97bbb8f3871b94e41b3d78df6b67534eb20f62f75dfc2bdfe5c2257daf9bc", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tailcall-0d25546a55ac4799)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stdout] test runtime::erased_fn_once::tests::dropping_without_call_runs_destructor_once ... ok
[INFO] [stdout] test runtime::erased_fn_once::tests::calling_runs_destructor_once ... ok
[INFO] [stdout] test runtime::slot::tests::round_trips_stored_value ... ok
[INFO] [stdout] test runtime::erased_fn_once::tests::sanity ... ok
[INFO] [stdout] test runtime::slot::tests::round_trips_value_up_to_declared_capacity ... ok
[INFO] [stdout] test runtime::thunk::tests::thunk_is_32_bytes_on_64_bit_targets ... ok
[INFO] [stdout] test runtime::erased_fn_once::tests::with_captures ... ok
[INFO] [stdout] test runtime::slot::tests::slot_layout_includes_alignment_padding ... ok
[INFO] [stdout] test runtime::slot::tests::rejects_values_that_exceed_slot_capacity - should panic ... ok
[INFO] [stderr]    Doc-tests tailcall
[INFO] [stdout] test runtime::erased_fn_once::tests::panic_during_call_drops_capture_once ... ok
[INFO] [stdout] test runtime::slot::tests::rejects_values_with_unsupported_alignment - should panic ... ok
[INFO] [stdout] test runtime::erased_fn_once::tests::with_too_many_captures_reports_actionable_message ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test src/lib.rs - (line 269) ... ok
[INFO] [stdout] test src/lib.rs - (line 108) ... ok
[INFO] [stdout] test src/lib.rs - (line 12) ... ok
[INFO] [stdout] test src/lib.rs - (line 75) ... ok
[INFO] [stdout] test src/lib.rs - (line 29) ... ok
[INFO] [stdout] test src/lib.rs - (line 284) ... ok
[INFO] [stdout] test src/lib.rs - (line 240) ... ok
[INFO] [stdout] test src/lib.rs - (line 48) ... ok
[INFO] [stdout] test src/lib.rs - (line 227) ... ok
[INFO] [stdout] test src/lib.rs - (line 130) ... ok
[INFO] [stdout] test src/runtime/mod.rs - runtime (line 31) ... ok
[INFO] [stdout] test src/runtime/mod.rs - runtime (line 63) ... ok
[INFO] [stdout] test src/lib.rs - (line 194) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.05s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8fd97bbb8f3871b94e41b3d78df6b67534eb20f62f75dfc2bdfe5c2257daf9bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fd97bbb8f3871b94e41b3d78df6b67534eb20f62f75dfc2bdfe5c2257daf9bc", kill_on_drop: false }`
[INFO] [stdout] 8fd97bbb8f3871b94e41b3d78df6b67534eb20f62f75dfc2bdfe5c2257daf9bc
