[INFO] fetching crate huffman_tree 0.1.0...
[INFO] testing huffman_tree-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate huffman_tree 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate huffman_tree 0.1.0
[INFO] finished tweaking crates.io crate huffman_tree 0.1.0
[INFO] tweaked toml for crates.io crate huffman_tree 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate huffman_tree 0.1.0 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] 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 14b95527a0ea8d1a79ac1554a957721a22584a3d411efd1fa55005b90eb95abe
[INFO] running `Command { std: "docker" "start" "-a" "14b95527a0ea8d1a79ac1554a957721a22584a3d411efd1fa55005b90eb95abe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14b95527a0ea8d1a79ac1554a957721a22584a3d411efd1fa55005b90eb95abe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14b95527a0ea8d1a79ac1554a957721a22584a3d411efd1fa55005b90eb95abe", kill_on_drop: false }`
[INFO] [stdout] 14b95527a0ea8d1a79ac1554a957721a22584a3d411efd1fa55005b90eb95abe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 838077eb89ae5bd492cfd01f541531dff71df912cc749970afc067156c3f56e7
[INFO] running `Command { std: "docker" "start" "-a" "838077eb89ae5bd492cfd01f541531dff71df912cc749970afc067156c3f56e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling huffman_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "838077eb89ae5bd492cfd01f541531dff71df912cc749970afc067156c3f56e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "838077eb89ae5bd492cfd01f541531dff71df912cc749970afc067156c3f56e7", kill_on_drop: false }`
[INFO] [stdout] 838077eb89ae5bd492cfd01f541531dff71df912cc749970afc067156c3f56e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] b228532c7036c381e83aeead11cb85994478e4dc5a3e9c3ce355a0ac3b72903b
[INFO] running `Command { std: "docker" "start" "-a" "b228532c7036c381e83aeead11cb85994478e4dc5a3e9c3ce355a0ac3b72903b", kill_on_drop: false }`
[INFO] [stderr]    Compiling huffman_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "b228532c7036c381e83aeead11cb85994478e4dc5a3e9c3ce355a0ac3b72903b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b228532c7036c381e83aeead11cb85994478e4dc5a3e9c3ce355a0ac3b72903b", kill_on_drop: false }`
[INFO] [stdout] b228532c7036c381e83aeead11cb85994478e4dc5a3e9c3ce355a0ac3b72903b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 819a8ab52430cffc953f84b800f627a3cb07d099c3d72b01bb6a04095f28661b
[INFO] running `Command { std: "docker" "start" "-a" "819a8ab52430cffc953f84b800f627a3cb07d099c3d72b01bb6a04095f28661b", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/huffman_tree-7180470d72deba03)
[INFO] [stderr]    Doc-tests huffman_tree
[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" "819a8ab52430cffc953f84b800f627a3cb07d099c3d72b01bb6a04095f28661b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "819a8ab52430cffc953f84b800f627a3cb07d099c3d72b01bb6a04095f28661b", kill_on_drop: false }`
[INFO] [stdout] 819a8ab52430cffc953f84b800f627a3cb07d099c3d72b01bb6a04095f28661b