[INFO] fetching crate immutable_string 0.1.1...
[INFO] testing immutable_string-0.1.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate immutable_string 0.1.1 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate immutable_string 0.1.1
[INFO] finished tweaking crates.io crate immutable_string 0.1.1
[INFO] tweaked toml for crates.io crate immutable_string 0.1.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate immutable_string 0.1.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 73b14096fdb4c241a7bb5191a4b8025cfcc42ea8882c925f2afb7977b425478a
[INFO] running `Command { std: "docker" "start" "-a" "73b14096fdb4c241a7bb5191a4b8025cfcc42ea8882c925f2afb7977b425478a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73b14096fdb4c241a7bb5191a4b8025cfcc42ea8882c925f2afb7977b425478a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73b14096fdb4c241a7bb5191a4b8025cfcc42ea8882c925f2afb7977b425478a", kill_on_drop: false }`
[INFO] [stdout] 73b14096fdb4c241a7bb5191a4b8025cfcc42ea8882c925f2afb7977b425478a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac4b9cebfa3657d8728fe07b5031110994bb62344eef5d25f418cf548e727551
[INFO] running `Command { std: "docker" "start" "-a" "ac4b9cebfa3657d8728fe07b5031110994bb62344eef5d25f418cf548e727551", kill_on_drop: false }`
[INFO] [stderr]    Compiling weak-table v0.3.2
[INFO] [stderr]    Compiling immutable_string v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "ac4b9cebfa3657d8728fe07b5031110994bb62344eef5d25f418cf548e727551", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac4b9cebfa3657d8728fe07b5031110994bb62344eef5d25f418cf548e727551", kill_on_drop: false }`
[INFO] [stdout] ac4b9cebfa3657d8728fe07b5031110994bb62344eef5d25f418cf548e727551
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1073bb92eb5083b9555ce799b980e3fa8f9119d91a9ef70c2502b38dda5cbb1a
[INFO] running `Command { std: "docker" "start" "-a" "1073bb92eb5083b9555ce799b980e3fa8f9119d91a9ef70c2502b38dda5cbb1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling immutable_string v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "1073bb92eb5083b9555ce799b980e3fa8f9119d91a9ef70c2502b38dda5cbb1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1073bb92eb5083b9555ce799b980e3fa8f9119d91a9ef70c2502b38dda5cbb1a", kill_on_drop: false }`
[INFO] [stdout] 1073bb92eb5083b9555ce799b980e3fa8f9119d91a9ef70c2502b38dda5cbb1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c500a24c44c119292d3ba3d528e73c26c8420063a344b53db094ab90e35bca3c
[INFO] running `Command { std: "docker" "start" "-a" "c500a24c44c119292d3ba3d528e73c26c8420063a344b53db094ab90e35bca3c", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/immutable_string-f2585d0518a84b84)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::display ... ok
[INFO] [stdout] test tests::iter_collect ... ok
[INFO] [stderr]    Doc-tests immutable_string
[INFO] [stdout] test tests::two_insertion_sharing ... 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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - ImmutableString::use_count (line 37) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.30s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c500a24c44c119292d3ba3d528e73c26c8420063a344b53db094ab90e35bca3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c500a24c44c119292d3ba3d528e73c26c8420063a344b53db094ab90e35bca3c", kill_on_drop: false }`
[INFO] [stdout] c500a24c44c119292d3ba3d528e73c26c8420063a344b53db094ab90e35bca3c