[INFO] fetching crate fork-tree 2.0.0...
[INFO] testing fork-tree-2.0.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate fork-tree 2.0.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate fork-tree 2.0.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fork-tree 2.0.0
[INFO] finished tweaking crates.io crate fork-tree 2.0.0
[INFO] tweaked toml for crates.io crate fork-tree 2.0.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20b13b0333379a1fbe4194335174aa5385735705b0c198f820742356e630508b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "20b13b0333379a1fbe4194335174aa5385735705b0c198f820742356e630508b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20b13b0333379a1fbe4194335174aa5385735705b0c198f820742356e630508b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20b13b0333379a1fbe4194335174aa5385735705b0c198f820742356e630508b", kill_on_drop: false }`
[INFO] [stdout] 20b13b0333379a1fbe4194335174aa5385735705b0c198f820742356e630508b
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8ce621b24220dea3fb6bef893325a4f0b768dc78f8e7ce70c3df117fd3973bb2
[INFO] running `Command { std: "docker" "start" "-a" "8ce621b24220dea3fb6bef893325a4f0b768dc78f8e7ce70c3df117fd3973bb2", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling radium v0.3.0
[INFO] [stderr]    Compiling byte-slice-cast v0.3.5
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling bitvec v0.17.4
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling parity-scale-codec-derive v1.2.2
[INFO] [stderr]    Compiling parity-scale-codec v1.3.5
[INFO] [stderr]    Compiling fork-tree v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.75s
[INFO] running `Command { std: "docker" "inspect" "8ce621b24220dea3fb6bef893325a4f0b768dc78f8e7ce70c3df117fd3973bb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ce621b24220dea3fb6bef893325a4f0b768dc78f8e7ce70c3df117fd3973bb2", kill_on_drop: false }`
[INFO] [stdout] 8ce621b24220dea3fb6bef893325a4f0b768dc78f8e7ce70c3df117fd3973bb2
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c3a12ec4ceb699ca244d74e40e2cd3e7f3fa5801d65c0c0c7f24635f99a70032
[INFO] running `Command { std: "docker" "start" "-a" "c3a12ec4ceb699ca244d74e40e2cd3e7f3fa5801d65c0c0c7f24635f99a70032", kill_on_drop: false }`
[INFO] [stderr]    Compiling fork-tree v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.61s
[INFO] running `Command { std: "docker" "inspect" "c3a12ec4ceb699ca244d74e40e2cd3e7f3fa5801d65c0c0c7f24635f99a70032", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3a12ec4ceb699ca244d74e40e2cd3e7f3fa5801d65c0c0c7f24635f99a70032", kill_on_drop: false }`
[INFO] [stdout] c3a12ec4ceb699ca244d74e40e2cd3e7f3fa5801d65c0c0c7f24635f99a70032
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5c7b5f355f39ce889023d431774bb68293521eedba8b192efc2e71c0d9461ae6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5c7b5f355f39ce889023d431774bb68293521eedba8b192efc2e71c0d9461ae6", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/fork_tree-c5f061f80740c520
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test test::finalize_root_works ... ok
[INFO] [stdout] test test::import_doesnt_add_duplicates ... ok
[INFO] [stderr]    Doc-tests fork-tree
[INFO] [stdout] test test::finalize_with_ancestor_works ... ok
[INFO] [stdout] test test::import_doesnt_revert ... ok
[INFO] [stdout] test test::find_node_backtracks_after_finding_highest_descending_node ... ok
[INFO] [stdout] test test::find_node_works ... ok
[INFO] [stdout] test test::map_works ... ok
[INFO] [stdout] test test::minimizes_calls_to_is_descendent_of ... ok
[INFO] [stdout] test test::finalize_with_descendent_works ... ok
[INFO] [stdout] test test::iter_iterates_in_preorder ... ok
[INFO] [stdout] test test::prune_works ... ok
[INFO] [stdout] test test::tree_rebalance ... ok
[INFO] [stdout] test test::finalize_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5c7b5f355f39ce889023d431774bb68293521eedba8b192efc2e71c0d9461ae6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c7b5f355f39ce889023d431774bb68293521eedba8b192efc2e71c0d9461ae6", kill_on_drop: false }`
[INFO] [stdout] 5c7b5f355f39ce889023d431774bb68293521eedba8b192efc2e71c0d9461ae6