[INFO] fetching crate trees 0.4.2...
[INFO] testing trees-0.4.2 against 1.59.0 for beta-1.60-1
[INFO] extracting crate trees 0.4.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate trees 0.4.2 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1773ba80f4a6f0306fd52f557e96f8489f55d1c5afb900c617c2ad5123db794d
[INFO] running `Command { std: "docker" "start" "-a" "1773ba80f4a6f0306fd52f557e96f8489f55d1c5afb900c617c2ad5123db794d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1773ba80f4a6f0306fd52f557e96f8489f55d1c5afb900c617c2ad5123db794d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1773ba80f4a6f0306fd52f557e96f8489f55d1c5afb900c617c2ad5123db794d", kill_on_drop: false }`
[INFO] [stdout] 1773ba80f4a6f0306fd52f557e96f8489f55d1c5afb900c617c2ad5123db794d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8effdaf79ca0c382d7f96b309bb924d762521b622c5c21071bec4625741de96
[INFO] running `Command { std: "docker" "start" "-a" "b8effdaf79ca0c382d7f96b309bb924d762521b622c5c21071bec4625741de96", kill_on_drop: false }`
[INFO] [stderr]    Compiling trees v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.89s
[INFO] running `Command { std: "docker" "inspect" "b8effdaf79ca0c382d7f96b309bb924d762521b622c5c21071bec4625741de96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8effdaf79ca0c382d7f96b309bb924d762521b622c5c21071bec4625741de96", kill_on_drop: false }`
[INFO] [stdout] b8effdaf79ca0c382d7f96b309bb924d762521b622c5c21071bec4625741de96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c584d4253fc660285c3ba4f8c5fc496beda6e96824c4417e5783e8da39c860c2
[INFO] running `Command { std: "docker" "start" "-a" "c584d4253fc660285c3ba4f8c5fc496beda6e96824c4417e5783e8da39c860c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling trees v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.31s
[INFO] running `Command { std: "docker" "inspect" "c584d4253fc660285c3ba4f8c5fc496beda6e96824c4417e5783e8da39c860c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c584d4253fc660285c3ba4f8c5fc496beda6e96824c4417e5783e8da39c860c2", kill_on_drop: false }`
[INFO] [stdout] c584d4253fc660285c3ba4f8c5fc496beda6e96824c4417e5783e8da39c860c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 796d79de75d6e54a5bcc14c7ac6778433b0402d454414be4445b1d2c61cf8bb3
[INFO] running `Command { std: "docker" "start" "-a" "796d79de75d6e54a5bcc14c7ac6778433b0402d454414be4445b1d2c61cf8bb3", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/trees-7263d10fdbe86cdd)
[INFO] [stdout] 
[INFO] [stdout] running 12 tests
[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 bfs_impls::tests::piled_tree_from_bfs_1_1 ... ok
[INFO] [stdout] test forest::tests::empty_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 forest::tests::piled_forest_from_tuple ... 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 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests trees
[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-a3aadf34a2243076.rlib -C embed-bitcode=no --error-format human` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "796d79de75d6e54a5bcc14c7ac6778433b0402d454414be4445b1d2c61cf8bb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "796d79de75d6e54a5bcc14c7ac6778433b0402d454414be4445b1d2c61cf8bb3", kill_on_drop: false }`
[INFO] [stdout] 796d79de75d6e54a5bcc14c7ac6778433b0402d454414be4445b1d2c61cf8bb3