[INFO] fetching crate tree-cursor 0.3.0...
[INFO] testing tree-cursor-0.3.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate tree-cursor 0.3.0 into /workspace/builds/worker-96/source
[INFO] validating manifest of crates.io crate tree-cursor 0.3.0 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 tree-cursor 0.3.0
[INFO] finished tweaking crates.io crate tree-cursor 0.3.0
[INFO] tweaked toml for crates.io crate tree-cursor 0.3.0 written to /workspace/builds/worker-96/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] [stderr]     Blocking waiting for file lock on package cache
[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-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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] b7f2f1d32aa1168a2ec4590fec79f2d4ef81e3512d9e1c48b11d3c32328da697
[INFO] running `Command { std: "docker" "start" "-a" "b7f2f1d32aa1168a2ec4590fec79f2d4ef81e3512d9e1c48b11d3c32328da697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7f2f1d32aa1168a2ec4590fec79f2d4ef81e3512d9e1c48b11d3c32328da697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7f2f1d32aa1168a2ec4590fec79f2d4ef81e3512d9e1c48b11d3c32328da697", kill_on_drop: false }`
[INFO] [stdout] b7f2f1d32aa1168a2ec4590fec79f2d4ef81e3512d9e1c48b11d3c32328da697
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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] 11be819014097784b51550586a2988597180fbe2d3ee88ee053a86c2b6b3468b
[INFO] running `Command { std: "docker" "start" "-a" "11be819014097784b51550586a2988597180fbe2d3ee88ee053a86c2b6b3468b", kill_on_drop: false }`
[INFO] [stderr]    Compiling tree-cursor v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "11be819014097784b51550586a2988597180fbe2d3ee88ee053a86c2b6b3468b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11be819014097784b51550586a2988597180fbe2d3ee88ee053a86c2b6b3468b", kill_on_drop: false }`
[INFO] [stdout] 11be819014097784b51550586a2988597180fbe2d3ee88ee053a86c2b6b3468b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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] 6850e4fc0133aefe4696ee1bc3765923087a36e258680d14e868eb12c77b24b7
[INFO] running `Command { std: "docker" "start" "-a" "6850e4fc0133aefe4696ee1bc3765923087a36e258680d14e868eb12c77b24b7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling tree-cursor v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.36s
[INFO] running `Command { std: "docker" "inspect" "6850e4fc0133aefe4696ee1bc3765923087a36e258680d14e868eb12c77b24b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6850e4fc0133aefe4696ee1bc3765923087a36e258680d14e868eb12c77b24b7", kill_on_drop: false }`
[INFO] [stdout] 6850e4fc0133aefe4696ee1bc3765923087a36e258680d14e868eb12c77b24b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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] e798b641d189e664f32582f7dedf0de79a7b5f2f40054fb2eb3a3f3e98079bf9
[INFO] running `Command { std: "docker" "start" "-a" "e798b641d189e664f32582f7dedf0de79a7b5f2f40054fb2eb3a3f3e98079bf9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.63s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/tree_cursor-fd57005f68629739)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test tests::hashmap_tree::down_map ... ok
[INFO] [stdout] test tests::link_tree::link_tree ... ok
[INFO] [stdout] test tests::link_tree::link_tree_scoped_down ... ok
[INFO] [stdout] test tests::standard_tree::full_traversal ... ok
[INFO] [stdout] test tests::standard_tree::get ... ok
[INFO] [stdout] test tests::standard_tree::iter_down ... ok
[INFO] [stdout] test tests::standard_tree::scoped_down ... ok
[INFO] [stdout] test tests::standard_tree::set_pos_error ... ok
[INFO] [stdout] test tests::standard_tree::take ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tree-cursor
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 90) ... ok
[INFO] [stdout] test src/lib.rs - (line 33) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.47s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e798b641d189e664f32582f7dedf0de79a7b5f2f40054fb2eb3a3f3e98079bf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e798b641d189e664f32582f7dedf0de79a7b5f2f40054fb2eb3a3f3e98079bf9", kill_on_drop: false }`
[INFO] [stdout] e798b641d189e664f32582f7dedf0de79a7b5f2f40054fb2eb3a3f3e98079bf9