[INFO] fetching crate slab_tree 0.3.2...
[INFO] testing slab_tree-0.3.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate slab_tree 0.3.2 into /workspace/builds/worker-44/source
[INFO] validating manifest of crates.io crate slab_tree 0.3.2 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 slab_tree 0.3.2
[INFO] finished tweaking crates.io crate slab_tree 0.3.2
[INFO] tweaked toml for crates.io crate slab_tree 0.3.2 written to /workspace/builds/worker-44/source/Cargo.toml
[INFO] crate crates.io crate slab_tree 0.3.2 already has a lockfile, it will not be regenerated
[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-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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] f556933450e1a111f75cc66a8c606493713f904e71043fd1a83eaf66ec8d0698
[INFO] running `Command { std: "docker" "start" "-a" "f556933450e1a111f75cc66a8c606493713f904e71043fd1a83eaf66ec8d0698", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f556933450e1a111f75cc66a8c606493713f904e71043fd1a83eaf66ec8d0698", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f556933450e1a111f75cc66a8c606493713f904e71043fd1a83eaf66ec8d0698", kill_on_drop: false }`
[INFO] [stdout] f556933450e1a111f75cc66a8c606493713f904e71043fd1a83eaf66ec8d0698
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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] 97f1bf3ea4367b39ec7335c1bdecfbaaa64a8c3fd2fb2ef9192f1add9468be39
[INFO] running `Command { std: "docker" "start" "-a" "97f1bf3ea4367b39ec7335c1bdecfbaaa64a8c3fd2fb2ef9192f1add9468be39", kill_on_drop: false }`
[INFO] [stderr]    Compiling snowflake v1.3.0
[INFO] [stderr]    Compiling slab_tree v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `Command { std: "docker" "inspect" "97f1bf3ea4367b39ec7335c1bdecfbaaa64a8c3fd2fb2ef9192f1add9468be39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97f1bf3ea4367b39ec7335c1bdecfbaaa64a8c3fd2fb2ef9192f1add9468be39", kill_on_drop: false }`
[INFO] [stdout] 97f1bf3ea4367b39ec7335c1bdecfbaaa64a8c3fd2fb2ef9192f1add9468be39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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] 815cfb320f202ce477816595f3ccea8ad29d2bcc2df90e2236a17265521b403d
[INFO] running `Command { std: "docker" "start" "-a" "815cfb320f202ce477816595f3ccea8ad29d2bcc2df90e2236a17265521b403d", kill_on_drop: false }`
[INFO] [stderr]    Compiling slab_tree v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.35s
[INFO] running `Command { std: "docker" "inspect" "815cfb320f202ce477816595f3ccea8ad29d2bcc2df90e2236a17265521b403d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "815cfb320f202ce477816595f3ccea8ad29d2bcc2df90e2236a17265521b403d", kill_on_drop: false }`
[INFO] [stdout] 815cfb320f202ce477816595f3ccea8ad29d2bcc2df90e2236a17265521b403d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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] 56371b1f5a19e429b77ace3c135b869bca6e878eac666300354a4657e34f47af
[INFO] running `Command { std: "docker" "start" "-a" "56371b1f5a19e429b77ace3c135b869bca6e878eac666300354a4657e34f47af", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.25s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/slab_tree-f73a1ad7548d0130)
[INFO] [stdout] 
[INFO] [stdout] running 60 tests
[INFO] [stdout] test core_tree::tests::get ... ok
[INFO] [stdout] test core_tree::tests::capacity ... ok
[INFO] [stdout] test core_tree::tests::get_mut ... ok
[INFO] [stdout] test core_tree::tests::get_with_bad_id ... ok
[INFO] [stdout] test core_tree::tests::insert ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::append_no_children_present ... ok
[INFO] [stdout] test core_tree::tests::remove ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::append_single_child_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::append_two_children_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::data ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::first_child ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::last_child ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::next_sibling ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::node_id ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::parent ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::prepend_no_children_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::prepend_single_child_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::prepend_two_children_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::prev_sibling ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_first_drop_grandchild_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_first_drop_single_child_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_first_no_children_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_first_drop_three_children_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_first_orphan_grandchild_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_last_no_children_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_first_drop_two_children_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_last_orphan_grandchild_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_last_single_child_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_last_three_children_present ... ok
[INFO] [stdout] test node::node_mut::node_mut_tests::remove_last_two_children_present ... ok
[INFO] [stdout] test node::node_ref::node_ref_tests::ancestors ... ok
[INFO] [stdout] test node::node_ref::node_ref_tests::children ... ok
[INFO] [stdout] test node::node_ref::node_ref_tests::data ... ok
[INFO] [stdout] test node::node_ref::node_ref_tests::first_child ... ok
[INFO] [stdout] test node::node_ref::node_ref_tests::last_child ... ok
[INFO] [stdout] test node::node_ref::node_ref_tests::next_sibling ... ok
[INFO] [stdout] test node::node_ref::node_ref_tests::parent ... ok
[INFO] [stdout] test node::node_ref::node_ref_tests::prev_sibling ... ok
[INFO] [stdout] test slab::tests::capacity ... ok
[INFO] [stdout] test slab::tests::double_remove ... ok
[INFO] [stdout] test slab::tests::get ... ok
[INFO] [stdout] test slab::tests::get_mut ... ok
[INFO] [stdout] test slab::tests::insert ... ok
[INFO] [stdout] test slab::tests::remove_and_reinsert ... ok
[INFO] [stdout] test slab::tests::remove_basic ... ok
[INFO] [stdout] test slab::tests::remove_multiple ... ok
[INFO] [stdout] test slab::tests::remove_with_bad_index ... ok
[INFO] [stdout] test tree::tree_tests::address_dropped ... ok
[INFO] [stdout] test tree::tree_tests::capacity ... ok
[INFO] [stdout] test tree::tree_tests::get ... ok
[INFO] [stdout] test tree::tree_tests::get_mut ... ok
[INFO] [stdout] test tree::tree_tests::get_node ... ok
[INFO] [stdout] test tree::tree_tests::get_node_mut ... ok
[INFO] [stdout] test tree::tree_tests::remove_drop ... ok
[INFO] [stdout] test tree::tree_tests::remove_orphan ... ok
[INFO] [stdout] test tree::tree_tests::remove_root_drop ... ok
[INFO] [stdout] test tree::tree_tests::remove_root_orphan ... ok
[INFO] [stdout] test tree::tree_tests::root ... ok
[INFO] [stdout] test tree::tree_tests::root_id ... ok
[INFO] [stdout] test tree::tree_tests::root_mut ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 60 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests slab_tree
[INFO] [stdout] 
[INFO] [stdout] running 44 tests
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::node_id (line 26) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::first_child (line 130) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::parent (line 70) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::data (line 43) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::next_sibling (line 110) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::prepend (line 214) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::prev_sibling (line 90) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::set_root (line 126) ... ok
[INFO] [stdout] test src/lib.rs - (line 33) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::as_ref (line 331) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::children (line 199) ... ok
[INFO] [stdout] test src/tree.rs - tree::TreeBuilder<T>::with_root (line 42) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::parent (line 67) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::root_mut (line 206) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::last_child (line 150) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::make_first_sibling (line 627) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::node_id (line 24) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::capacity (line 155) ... ok
[INFO] [stdout] test src/tree.rs - tree::TreeBuilder<T>::new (line 24) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::remove_first (line 262) ... ok
[INFO] [stdout] test src/tree.rs - tree::TreeBuilder<T>::with_capacity (line 61) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::next_sibling (line 109) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::last_child (line 151) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::ancestors (line 172) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::new (line 107) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::prev_sibling (line 88) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::get (line 228) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::get_mut (line 252) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::write_formatted (line 525) ... ok
[INFO] [stdout] test src/tree.rs - tree::TreeBuilder<T>::build (line 79) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::data (line 45) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::append (line 170) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::traverse_level_order (line 262) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::traverse_post_order (line 243) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::root_id (line 170) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::write_formatted (line 505) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::first_child (line 130) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::make_last_sibling (line 543) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::swap_next_sibling (line 352) ... ok
[INFO] [stdout] test src/node/node_ref.rs - node::node_ref::NodeRef::traverse_pre_order (line 224) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::root (line 188) ... ok
[INFO] [stdout] test src/tree.rs - tree::Tree<T>::remove (line 280) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::swap_prev_sibling (line 448) ... ok
[INFO] [stdout] test src/node/node_mut.rs - node::node_mut::NodeMut::remove_last (line 299) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 44 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.47s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "56371b1f5a19e429b77ace3c135b869bca6e878eac666300354a4657e34f47af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56371b1f5a19e429b77ace3c135b869bca6e878eac666300354a4657e34f47af", kill_on_drop: false }`
[INFO] [stdout] 56371b1f5a19e429b77ace3c135b869bca6e878eac666300354a4657e34f47af