[INFO] fetching crate toy_arena 0.2.0...
[INFO] testing toy_arena-0.2.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate toy_arena 0.2.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate toy_arena 0.2.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate toy_arena 0.2.0
[INFO] finished tweaking crates.io crate toy_arena 0.2.0
[INFO] tweaked toml for crates.io crate toy_arena 0.2.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f83d4330c254a985b5a852274de2c9e2f78fd07e8b9352c96cc792813b6d3d96
[INFO] running `Command { std: "docker" "start" "-a" "f83d4330c254a985b5a852274de2c9e2f78fd07e8b9352c96cc792813b6d3d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f83d4330c254a985b5a852274de2c9e2f78fd07e8b9352c96cc792813b6d3d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f83d4330c254a985b5a852274de2c9e2f78fd07e8b9352c96cc792813b6d3d96", kill_on_drop: false }`
[INFO] [stdout] f83d4330c254a985b5a852274de2c9e2f78fd07e8b9352c96cc792813b6d3d96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 69ca1ebf616b5458d2cbfdef9b7719871cd8a86fe58420fe04fd725e76c466d9
[INFO] running `Command { std: "docker" "start" "-a" "69ca1ebf616b5458d2cbfdef9b7719871cd8a86fe58420fe04fd725e76c466d9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling toy_arena v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         unsafe { &*self.inner.as_ref().tree.get() }
[INFO] [stdout]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         unsafe { &mut *self.inner.as_ref().tree.get() }
[INFO] [stdout]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:87:20
[INFO] [stdout]    |
[INFO] [stdout] 87 |         let tree = unsafe { self.bind.tree() };
[INFO] [stdout]    |                    ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:92:20
[INFO] [stdout]    |
[INFO] [stdout] 92 |         let tree = unsafe { self.bind.tree_mut() };
[INFO] [stdout]    |                    ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_parent`
[INFO] [stdout]   --> src/tree/link.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn set_parent(&mut self, parent: Option<Slot>) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.73s
[INFO] running `Command { std: "docker" "inspect" "69ca1ebf616b5458d2cbfdef9b7719871cd8a86fe58420fe04fd725e76c466d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69ca1ebf616b5458d2cbfdef9b7719871cd8a86fe58420fe04fd725e76c466d9", kill_on_drop: false }`
[INFO] [stdout] 69ca1ebf616b5458d2cbfdef9b7719871cd8a86fe58420fe04fd725e76c466d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dbeea4a8a909c92a82c110bb077f29f89418b871902450131b6d23fdd719d1aa
[INFO] running `Command { std: "docker" "start" "-a" "dbeea4a8a909c92a82c110bb077f29f89418b871902450131b6d23fdd719d1aa", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         unsafe { &*self.inner.as_ref().tree.get() }
[INFO] [stdout]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         unsafe { &mut *self.inner.as_ref().tree.get() }
[INFO] [stdout]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:87:20
[INFO] [stdout]    |
[INFO] [stdout] 87 |         let tree = unsafe { self.bind.tree() };
[INFO] [stdout]    |                    ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:92:20
[INFO] [stdout]    |
[INFO] [stdout] 92 |         let tree = unsafe { self.bind.tree_mut() };
[INFO] [stdout]    |                    ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_parent`
[INFO] [stdout]   --> src/tree/link.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn set_parent(&mut self, parent: Option<Slot>) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling toy_arena v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |         unsafe { &*self.inner.as_ref().tree.get() }
[INFO] [stdout]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         unsafe { &mut *self.inner.as_ref().tree.get() }
[INFO] [stdout]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:87:20
[INFO] [stdout]    |
[INFO] [stdout] 87 |         let tree = unsafe { self.bind.tree() };
[INFO] [stdout]    |                    ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/tree/iter_mut.rs:92:20
[INFO] [stdout]    |
[INFO] [stdout] 92 |         let tree = unsafe { self.bind.tree_mut() };
[INFO] [stdout]    |                    ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_parent`
[INFO] [stdout]   --> src/tree/link.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn set_parent(&mut self, parent: Option<Slot>) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `Command { std: "docker" "inspect" "dbeea4a8a909c92a82c110bb077f29f89418b871902450131b6d23fdd719d1aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbeea4a8a909c92a82c110bb077f29f89418b871902450131b6d23fdd719d1aa", kill_on_drop: false }`
[INFO] [stdout] dbeea4a8a909c92a82c110bb077f29f89418b871902450131b6d23fdd719d1aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 87d50a7f4bbbcbe38ab33e91935713ba38a036d10481286fcbc6e22c6a2acffe
[INFO] running `Command { std: "docker" "start" "-a" "87d50a7f4bbbcbe38ab33e91935713ba38a036d10481286fcbc6e22c6a2acffe", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/tree/iter_mut.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |         unsafe { &*self.inner.as_ref().tree.get() }
[INFO] [stderr]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/tree/iter_mut.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |         unsafe { &mut *self.inner.as_ref().tree.get() }
[INFO] [stderr]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/tree/iter_mut.rs:87:20
[INFO] [stderr]    |
[INFO] [stderr] 87 |         let tree = unsafe { self.bind.tree() };
[INFO] [stderr]    |                    ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/tree/iter_mut.rs:92:20
[INFO] [stderr]    |
[INFO] [stderr] 92 |         let tree = unsafe { self.bind.tree_mut() };
[INFO] [stderr]    |                    ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_parent`
[INFO] [stderr]   --> src/tree/link.rs:49:12
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn set_parent(&mut self, parent: Option<Slot>) {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `toy_arena` (lib) generated 5 warnings
[INFO] [stderr] warning: `toy_arena` (lib test) generated 5 warnings (5 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/toy_arena-07846abcebddbe5b)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test test::drain ... ok
[INFO] [stdout] test test::entry_binds ... ok
[INFO] [stdout] test test::entry_bind ... ok
[INFO] [stdout] test test::gen_macro ... ok
[INFO] [stdout] test test::insert_remove_invalidate_replace ... ok
[INFO] [stdout] test test::retain ... ok
[INFO] [stdout] test tree::test::manual_traverse ... ok
[INFO] [stdout] test tree::test::automatic_traverse ... ok
[INFO] [stdout] test tree::test::tree_macro_test ... ok
[INFO] [stdout] test tree::test::tree_remove ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests toy_arena
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test src/_example.rs - _example (line 62) ... ok
[INFO] [stdout] test src/_example.rs - _example (line 40) ... ok
[INFO] [stdout] test src/_example.rs - _example (line 7) ... ok
[INFO] [stdout] test src/tree.rs - tree::tree (line 326) ... ok
[INFO] [stdout] test src/lib.rs - arena (line 713) ... ok
[INFO] [stdout] test src/lib.rs - Index (line 124) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.31s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "87d50a7f4bbbcbe38ab33e91935713ba38a036d10481286fcbc6e22c6a2acffe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87d50a7f4bbbcbe38ab33e91935713ba38a036d10481286fcbc6e22c6a2acffe", kill_on_drop: false }`
[INFO] [stdout] 87d50a7f4bbbcbe38ab33e91935713ba38a036d10481286fcbc6e22c6a2acffe