[INFO] fetching crate trees 0.4.2...
[INFO] testing trees-0.4.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate trees 0.4.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate trees 0.4.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate trees 0.4.2
[INFO] finished tweaking crates.io crate trees 0.4.2
[INFO] tweaked toml for crates.io crate trees 0.4.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e94538521d33524fc8d125de9364c8f1488b2862b337a4dda4375bcd7a130f57
[INFO] running `Command { std: "docker" "start" "-a" "e94538521d33524fc8d125de9364c8f1488b2862b337a4dda4375bcd7a130f57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e94538521d33524fc8d125de9364c8f1488b2862b337a4dda4375bcd7a130f57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e94538521d33524fc8d125de9364c8f1488b2862b337a4dda4375bcd7a130f57", kill_on_drop: false }`
[INFO] [stdout] e94538521d33524fc8d125de9364c8f1488b2862b337a4dda4375bcd7a130f57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 82805dbe1ca27704d71a2eea4dc3f918ee4f63fdc5ae5e5ad29c9c5b9ccf2b4c
[INFO] running `Command { std: "docker" "start" "-a" "82805dbe1ca27704d71a2eea4dc3f918ee4f63fdc5ae5e5ad29c9c5b9ccf2b4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling trees v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.53s
[INFO] running `Command { std: "docker" "inspect" "82805dbe1ca27704d71a2eea4dc3f918ee4f63fdc5ae5e5ad29c9c5b9ccf2b4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82805dbe1ca27704d71a2eea4dc3f918ee4f63fdc5ae5e5ad29c9c5b9ccf2b4c", kill_on_drop: false }`
[INFO] [stdout] 82805dbe1ca27704d71a2eea4dc3f918ee4f63fdc5ae5e5ad29c9c5b9ccf2b4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9552f7939d0909c8a8a498a566191f02dc138ccea8b6096ffb54ffcc1204e4c
[INFO] running `Command { std: "docker" "start" "-a" "f9552f7939d0909c8a8a498a566191f02dc138ccea8b6096ffb54ffcc1204e4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling trees v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.27s
[INFO] running `Command { std: "docker" "inspect" "f9552f7939d0909c8a8a498a566191f02dc138ccea8b6096ffb54ffcc1204e4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9552f7939d0909c8a8a498a566191f02dc138ccea8b6096ffb54ffcc1204e4c", kill_on_drop: false }`
[INFO] [stdout] f9552f7939d0909c8a8a498a566191f02dc138ccea8b6096ffb54ffcc1204e4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6ddaa28b8dab81c65fb6ac22fcc8a93bb8535a8d7e4bfae88335baa48e8444cc
[INFO] running `Command { std: "docker" "start" "-a" "6ddaa28b8dab81c65fb6ac22fcc8a93bb8535a8d7e4bfae88335baa48e8444cc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/trees-7000a57504a257c6)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[INFO] [stderr]    Doc-tests trees
[INFO] [stdout] test bfs_impls::tests::piled_forest_from_bfs ... ok
[INFO] [stdout] test bfs_impls::tests::piled_forest_from_bfs_1_1 ... ok
[INFO] [stdout] test bfs_impls::tests::piled_tree_from_bfs ... ok
[INFO] [stdout] test forest::tests::empty_piled_forest_from_tuple ... ok
[INFO] [stdout] test bfs_impls::tests::piled_tree_from_bfs_1_1 ... ok
[INFO] [stdout] test forest::tests::piled_forest_from_tuple ... ok
[INFO] [stdout] test rc::tests::rc_works ... ok
[INFO] [stdout] test tree::tests::piled_tree_from_tuple ... ok
[INFO] [stdout] test tuple::tests::forest_postorder ... ok
[INFO] [stdout] test tuple::tests::forest_preorder ... ok
[INFO] [stdout] test tuple::tests::tree_postorder ... ok
[INFO] [stdout] test tuple::tests::tree_preorder ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 88 tests
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name trees --test /opt/rustwide/workdir/src/lib.rs -L dependency=/opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern trees=/opt/rustwide/target/debug/deps/libtrees-a31548aab553ea2a.rlib -C embed-bitcode=no --error-format human` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "6ddaa28b8dab81c65fb6ac22fcc8a93bb8535a8d7e4bfae88335baa48e8444cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ddaa28b8dab81c65fb6ac22fcc8a93bb8535a8d7e4bfae88335baa48e8444cc", kill_on_drop: false }`
[INFO] [stdout] 6ddaa28b8dab81c65fb6ac22fcc8a93bb8535a8d7e4bfae88335baa48e8444cc