[INFO] fetching crate unbounded-interval-tree 0.2.3...
[INFO] testing unbounded-interval-tree-0.2.3 against 1.55.0 for beta-1.56-1
[INFO] extracting crate unbounded-interval-tree 0.2.3 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate unbounded-interval-tree 0.2.3 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 unbounded-interval-tree 0.2.3
[INFO] finished tweaking crates.io crate unbounded-interval-tree 0.2.3
[INFO] tweaked toml for crates.io crate unbounded-interval-tree 0.2.3 written to /workspace/builds/worker-3/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 73c0ac46ba86ee998fcc4588066e7e521d7c262877028b13d543f8c367242ef2
[INFO] running `Command { std: "docker" "start" "-a" "73c0ac46ba86ee998fcc4588066e7e521d7c262877028b13d543f8c367242ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "73c0ac46ba86ee998fcc4588066e7e521d7c262877028b13d543f8c367242ef2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73c0ac46ba86ee998fcc4588066e7e521d7c262877028b13d543f8c367242ef2", kill_on_drop: false }`
[INFO] [stdout] 73c0ac46ba86ee998fcc4588066e7e521d7c262877028b13d543f8c367242ef2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 52fa8d4943dda402ddc08efe4bcbe842602d9a7a8c3a7b43f3d103bd78738561
[INFO] running `Command { std: "docker" "start" "-a" "52fa8d4943dda402ddc08efe4bcbe842602d9a7a8c3a7b43f3d103bd78738561", kill_on_drop: false }`
[INFO] [stderr]    Compiling unbounded-interval-tree v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/lib.rs:666:9
[INFO] [stdout]     |
[INFO] [stdout] 666 |         mem::replace(&mut self.root, None);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "52fa8d4943dda402ddc08efe4bcbe842602d9a7a8c3a7b43f3d103bd78738561", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52fa8d4943dda402ddc08efe4bcbe842602d9a7a8c3a7b43f3d103bd78738561", kill_on_drop: false }`
[INFO] [stdout] 52fa8d4943dda402ddc08efe4bcbe842602d9a7a8c3a7b43f3d103bd78738561
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 18192d7f9090942ea082eeb95708e5e789d48d77a6a367510fac134afe0eb8b5
[INFO] running `Command { std: "docker" "start" "-a" "18192d7f9090942ea082eeb95708e5e789d48d77a6a367510fac134afe0eb8b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling unbounded-interval-tree v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/lib.rs:666:9
[INFO] [stdout]     |
[INFO] [stdout] 666 |         mem::replace(&mut self.root, None);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/lib.rs:666:9
[INFO] [stdout]     |
[INFO] [stdout] 666 |         mem::replace(&mut self.root, None);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.60s
[INFO] running `Command { std: "docker" "inspect" "18192d7f9090942ea082eeb95708e5e789d48d77a6a367510fac134afe0eb8b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18192d7f9090942ea082eeb95708e5e789d48d77a6a367510fac134afe0eb8b5", kill_on_drop: false }`
[INFO] [stdout] 18192d7f9090942ea082eeb95708e5e789d48d77a6a367510fac134afe0eb8b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 4027cf7ff1615f93885db5c7c82384da6c04a04e882a099b8fa282f3ce6020d7
[INFO] running `Command { std: "docker" "start" "-a" "4027cf7ff1615f93885db5c7c82384da6c04a04e882a099b8fa282f3ce6020d7", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout] running 16 tests
[INFO] [stderr]    --> src/lib.rs:666:9
[INFO] [stderr]     |
[INFO] [stderr] 666 |         mem::replace(&mut self.root, None);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: `unbounded-interval-tree` (lib) generated 1 warning
[INFO] [stderr] warning: `unbounded-interval-tree` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/unbounded_interval_tree-4cfe53c8d0bad2ba)
[INFO] [stdout] test tests::clear_works_as_expected ... ok
[INFO] [stdout] test tests::it_updates_value ... ok
[INFO] [stdout] test tests::iter_works_as_expected ... ok
[INFO] [stdout] test tests::it_inserts_left_right_node ... ok
[INFO] [stdout] test tests::consecutive_excluded_non_contiguous_difference_works_as_expected ... ok
[INFO] [stdout] test tests::it_inserts_root ... ok
[INFO] [stdout] test tests::cmp_works_as_expected ... ok
[INFO] [stdout] test tests::contains_works_as_expected ... ok
[INFO] [stdout] test tests::difference_works_as_expected ... ok
[INFO] [stdout] test tests::difference_and_overlaps_with_tuple_works_as_expected ... ok
[INFO] [stdout] test tests::len_and_is_empty_works_as_expected ... ok
[INFO] [stdout] test tests::contains_point_works_as_expected ... ok
[INFO] [stdout] test tests::remove_random_leaf_empty_tree_works_as_expected ... ok
[INFO] [stdout] test tests::remove_random_leaf_works_as_expected ... ok
[INFO] [stderr]    Doc-tests unbounded-interval-tree
[INFO] [stdout] test tests::remove_random_leaf_one_node_tree_works_as_expected ... ok
[INFO] [stdout] test tests::overlap_works_as_expected ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::remove_random_leaf (line 467) ... ok
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::get_interval_overlaps (line 198) ... ok
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::len (line 616) ... ok
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::contains_point (line 159) ... ok
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::contains_interval (line 178) ... ok
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::is_empty (line 636) ... ok
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::clear (line 655) ... ok
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::iter (line 61) ... ok
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::insert (line 89) ... ok
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::get_interval_difference (line 224) ... ok
[INFO] [stdout] test src/lib.rs - IntervalTree<Q>::contains_point (line 145) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.49s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4027cf7ff1615f93885db5c7c82384da6c04a04e882a099b8fa282f3ce6020d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4027cf7ff1615f93885db5c7c82384da6c04a04e882a099b8fa282f3ce6020d7", kill_on_drop: false }`
[INFO] [stdout] 4027cf7ff1615f93885db5c7c82384da6c04a04e882a099b8fa282f3ce6020d7