[INFO] fetching crate generational-indextree 1.1.2...
[INFO] testing generational-indextree-1.1.2 against 1.49.0 for beta-1.50-1
[INFO] extracting crate generational-indextree 1.1.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate generational-indextree 1.1.2 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 generational-indextree 1.1.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate generational-indextree 1.1.2
[INFO] tweaked toml for crates.io crate generational-indextree 1.1.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate generational-indextree 1.1.2 already has a lockfile, it will not be regenerated
[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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e8c1fc1d8ad4e50d5e3c441210adcdc40c883f0da3b0c038f927bb2cdd5fd7a
[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" "6e8c1fc1d8ad4e50d5e3c441210adcdc40c883f0da3b0c038f927bb2cdd5fd7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e8c1fc1d8ad4e50d5e3c441210adcdc40c883f0da3b0c038f927bb2cdd5fd7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e8c1fc1d8ad4e50d5e3c441210adcdc40c883f0da3b0c038f927bb2cdd5fd7a", kill_on_drop: false }`
[INFO] [stdout] 6e8c1fc1d8ad4e50d5e3c441210adcdc40c883f0da3b0c038f927bb2cdd5fd7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ad9a24c703c2fca36e6f8e714947f98645eb7d68cd16d3c54ca72f0e9c205b6
[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" "9ad9a24c703c2fca36e6f8e714947f98645eb7d68cd16d3c54ca72f0e9c205b6", kill_on_drop: false }`
[INFO] [stderr]    Compiling generational-arena v0.2.8
[INFO] [stderr]    Compiling generational-indextree v1.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "9ad9a24c703c2fca36e6f8e714947f98645eb7d68cd16d3c54ca72f0e9c205b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ad9a24c703c2fca36e6f8e714947f98645eb7d68cd16d3c54ca72f0e9c205b6", kill_on_drop: false }`
[INFO] [stdout] 9ad9a24c703c2fca36e6f8e714947f98645eb7d68cd16d3c54ca72f0e9c205b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ddb45ec4dd5c91c6914eae8f8397d7946495ba189ec07c503ea3ac62c336aff4
[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" "ddb45ec4dd5c91c6914eae8f8397d7946495ba189ec07c503ea3ac62c336aff4", kill_on_drop: false }`
[INFO] [stderr]    Compiling generational-indextree v1.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `n1_id`
[INFO] [stdout]    --> src/arena.rs:279:9
[INFO] [stdout]     |
[INFO] [stdout] 279 |     let n1_id = arena.new_node("1");
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_n1_id`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n2_id`
[INFO] [stdout]    --> src/arena.rs:280:9
[INFO] [stdout]     |
[INFO] [stdout] 280 |     let n2_id = arena.new_node("2");
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_n2_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n3_id`
[INFO] [stdout]    --> src/arena.rs:281:9
[INFO] [stdout]     |
[INFO] [stdout] 281 |     let n3_id = arena.new_node("3");
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_n3_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `Command { std: "docker" "inspect" "ddb45ec4dd5c91c6914eae8f8397d7946495ba189ec07c503ea3ac62c336aff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddb45ec4dd5c91c6914eae8f8397d7946495ba189ec07c503ea3ac62c336aff4", kill_on_drop: false }`
[INFO] [stdout] ddb45ec4dd5c91c6914eae8f8397d7946495ba189ec07c503ea3ac62c336aff4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", 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] b62aa0058a99c95580067647726da85eff4e450d5bef2fc7adcd8bcace7d16ec
[INFO] running `Command { std: "docker" "start" "-a" "b62aa0058a99c95580067647726da85eff4e450d5bef2fc7adcd8bcace7d16ec", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `n1_id`
[INFO] [stdout] running 1 test
[INFO] [stderr]    --> src/arena.rs:279:9
[INFO] [stdout] test arena::reuse_node ... ok
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr] 279 |     let n1_id = arena.new_node("1");
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_n1_id`
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] running 4 tests
[INFO] [stderr] 
[INFO] [stdout] test insert_before_self ... ok
[INFO] [stderr] warning: unused variable: `n2_id`
[INFO] [stdout] test prepend_self ... ok
[INFO] [stderr]    --> src/arena.rs:280:9
[INFO] [stdout] test insert_after_self ... ok
[INFO] [stderr]     |
[INFO] [stderr] 280 |     let n2_id = arena.new_node("2");
[INFO] [stderr]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_n2_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n3_id`
[INFO] [stderr]    --> src/arena.rs:281:9
[INFO] [stderr]     |
[INFO] [stderr] 281 |     let n3_id = arena.new_node("3");
[INFO] [stderr]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_n3_id`
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/generational_indextree-6fb93ab2737d0b90
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/insert_error-d8a7457b6f5da802
[INFO] [stdout] test append_self ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test is_removed ... ok
[INFO] [stdout] test get_mut ... ok
[INFO] [stdout] test iter ... ok
[INFO] [stdout] test success_create ... ok
[INFO] [stdout] test get ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lib-40b5a9bad1c4c85c
[INFO] [stdout] test success_detach ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/remove-bd45032ddc7da7dd
[INFO] [stdout] test remove ... ok
[INFO] [stdout] test first_prepend ... ok
[INFO] [stdout] test insert_removed_node ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test first_child_with_no_children ... ok
[INFO] [stdout] test middle_child_with_multiple_children ... ok
[INFO] [stdout] test last_child_with_no_children ... ok
[INFO] [stdout] test middle_child_with_single_child ... ok
[INFO] [stdout] test middle_child_with_no_children ... ok
[INFO] [stdout] test single_child_with_no_children ... ok
[INFO] [stdout] test single_child_with_single_child ... ok
[INFO] [stdout] test toplevel_with_single_child ... ok
[INFO] [stdout] test toplevel_with_no_child ... ok
[INFO] [stderr]    Doc-tests generational-indextree
[INFO] [stdout] test toplevel_with_multiple_children ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 38 tests
[INFO] [stdout] test src/arena.rs - arena::Arena<T>::get (line 102) ... ok
[INFO] [stdout] test src/arena.rs - arena::Arena<T>::iter (line 197) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::checked_append (line 517) ... ok
[INFO] [stdout] test src/arena.rs - arena::Arena<T>::get_mut (line 135) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::checked_insert_after (line 695) ... ok
[INFO] [stdout] test src/arena.rs - arena::Arena<T>::new_node (line 48) ... ok
[INFO] [stdout] test src/arena.rs - arena::Arena<T>::get (line 112) ... ok
[INFO] [stdout] test src/arena.rs - arena::Arena<T>::get2_mut (line 160) ... ok
[INFO] [stdout] test src/arena.rs - arena::Arena<T>::count (line 63) ... ok
[INFO] [stdout] test src/arena.rs - arena::Arena<T>::iter_pairs (line 214) ... ok
[INFO] [stdout] test src/arena.rs - arena::Arena<T>::iter (line 185) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::ancestors (line 61) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::append (line 474) ... ok
[INFO] [stdout] test src/arena.rs - arena::Arena<T>::is_empty (line 81) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::checked_insert_before (line 790) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::checked_prepend (line 604) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::descendants (line 253) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::following_siblings (line 143) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::prepend (line 561) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::detach (line 409) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::preceding_siblings (line 104) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::children (line 178) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::remove (line 836) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::insert_after (line 646) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::insert_before (line 742) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::remove_subtree (line 913) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::reverse_traverse (line 342) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::reverse_children (line 213) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::traverse (line 298) ... ok
[INFO] [stdout] test src/id.rs - id::NodeId::reverse_traverse (line 376) ... ok
[INFO] [stdout] test src/node.rs - node::Node<T>::previous_sibling (line 142) ... ok
[INFO] [stdout] test src/node.rs - node::Node<T>::parent (line 57) ... ok
[INFO] [stdout] test src/node.rs - node::Node<T>::last_child (line 113) ... ok
[INFO] [stdout] test src/lib.rs - (line 11) ... ok
[INFO] [stdout] test src/node.rs - node::Node<T>::next_sibling (line 196) ... ok
[INFO] [stdout] test src/node.rs - node::Node<T>::previous_sibling (line 166) ... ok
[INFO] [stdout] test src/node.rs - node::Node<T>::first_child (line 85) ... ok
[INFO] [stdout] test src/node.rs - node::Node<T>::next_sibling (line 220) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 38 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b62aa0058a99c95580067647726da85eff4e450d5bef2fc7adcd8bcace7d16ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b62aa0058a99c95580067647726da85eff4e450d5bef2fc7adcd8bcace7d16ec", kill_on_drop: false }`
[INFO] [stdout] b62aa0058a99c95580067647726da85eff4e450d5bef2fc7adcd8bcace7d16ec