[INFO] fetching crate gctree 0.4.0...
[INFO] testing gctree-0.4.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate gctree 0.4.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate gctree 0.4.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gctree 0.4.0
[INFO] finished tweaking crates.io crate gctree 0.4.0
[INFO] tweaked toml for crates.io crate gctree 0.4.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded deltoid-derive v0.11.1
[INFO] [stderr]   Downloaded deltoid v0.11.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd00eb762107f80ce1d8bccb5be52df84ce64f0e5470760524fd874591123dc2
[INFO] running `Command { std: "docker" "start" "-a" "bd00eb762107f80ce1d8bccb5be52df84ce64f0e5470760524fd874591123dc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd00eb762107f80ce1d8bccb5be52df84ce64f0e5470760524fd874591123dc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd00eb762107f80ce1d8bccb5be52df84ce64f0e5470760524fd874591123dc2", kill_on_drop: false }`
[INFO] [stdout] bd00eb762107f80ce1d8bccb5be52df84ce64f0e5470760524fd874591123dc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 208ac020f2f25bbf75390dcd6d2607d75eebc671fd4aeea9a1bedc3c90fa4d2f
[INFO] running `Command { std: "docker" "start" "-a" "208ac020f2f25bbf75390dcd6d2607d75eebc671fd4aeea9a1bedc3c90fa4d2f", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling deltoid v0.11.3
[INFO] [stderr]    Compiling deltoid-derive v0.11.1
[INFO] [stderr]    Compiling gctree v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.03s
[INFO] running `Command { std: "docker" "inspect" "208ac020f2f25bbf75390dcd6d2607d75eebc671fd4aeea9a1bedc3c90fa4d2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "208ac020f2f25bbf75390dcd6d2607d75eebc671fd4aeea9a1bedc3c90fa4d2f", kill_on_drop: false }`
[INFO] [stdout] 208ac020f2f25bbf75390dcd6d2607d75eebc671fd4aeea9a1bedc3c90fa4d2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10ffe0c1269afd564004bf0741fa914e52b21fdcd21e56072970ad146700fed3
[INFO] running `Command { std: "docker" "start" "-a" "10ffe0c1269afd564004bf0741fa914e52b21fdcd21e56072970ad146700fed3", kill_on_drop: false }`
[INFO] [stderr]    Compiling gctree v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.95s
[INFO] running `Command { std: "docker" "inspect" "10ffe0c1269afd564004bf0741fa914e52b21fdcd21e56072970ad146700fed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10ffe0c1269afd564004bf0741fa914e52b21fdcd21e56072970ad146700fed3", kill_on_drop: false }`
[INFO] [stdout] 10ffe0c1269afd564004bf0741fa914e52b21fdcd21e56072970ad146700fed3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 09521b2e52910da794d74b4f3a04d670c497237bb66313495b03a3e32fccc7f6
[INFO] running `Command { std: "docker" "start" "-a" "09521b2e52910da794d74b4f3a04d670c497237bb66313495b03a3e32fccc7f6", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/gctree-cdb1f3f5c1c685ff)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::ancestors ... ok
[INFO] [stdout] test tests::add_subtree ... ok
[INFO] [stdout] test tests::dfs_traversal ... ok
[INFO] [stdout] test tests::remove_subtree ... ok
[INFO] [stdout] test tests::bfs_traversal ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests gctree
[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" "09521b2e52910da794d74b4f3a04d670c497237bb66313495b03a3e32fccc7f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09521b2e52910da794d74b4f3a04d670c497237bb66313495b03a3e32fccc7f6", kill_on_drop: false }`
[INFO] [stdout] 09521b2e52910da794d74b4f3a04d670c497237bb66313495b03a3e32fccc7f6