[INFO] cloning repository https://github.com/hatoo/haneru
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hatoo/haneru" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhatoo%2Fhaneru", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhatoo%2Fhaneru'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2cb00c3d5dc85ecb811fcc3281bbcccc725566b9
[INFO] testing hatoo/haneru against beta-2023-04-20 for beta-1.70-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhatoo%2Fhaneru" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hatoo/haneru on toolchain beta-2023-04-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hatoo/haneru
[INFO] finished tweaking git repo https://github.com/hatoo/haneru
[INFO] tweaked toml for git repo https://github.com/hatoo/haneru written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hatoo/haneru already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rio v0.9.4
[INFO] [stderr]   Downloaded flume v0.10.4
[INFO] [stderr]   Downloaded zerocopy v0.5.0
[INFO] [stderr]   Downloaded zerocopy-derive v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7ab325c76b48203ebd8b909b15d18592bf71955ffe2d0122faac528d09ff6f4
[INFO] running `Command { std: "docker" "start" "-a" "a7ab325c76b48203ebd8b909b15d18592bf71955ffe2d0122faac528d09ff6f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7ab325c76b48203ebd8b909b15d18592bf71955ffe2d0122faac528d09ff6f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7ab325c76b48203ebd8b909b15d18592bf71955ffe2d0122faac528d09ff6f4", kill_on_drop: false }`
[INFO] [stdout] a7ab325c76b48203ebd8b909b15d18592bf71955ffe2d0122faac528d09ff6f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2d866cac3b1493818920f5cbfea11bd9d32bfecc3ee8b8465cf44a88e3013e4
[INFO] running `Command { std: "docker" "start" "-a" "f2d866cac3b1493818920f5cbfea11bd9d32bfecc3ee8b8465cf44a88e3013e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling event-listener v2.5.1
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling futures-core v0.3.14
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling futures-sink v0.3.14
[INFO] [stderr]    Compiling lock_api v0.4.3
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling async-rwlock v1.3.0
[INFO] [stderr]    Compiling spinning_top v0.2.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling rio v0.9.4
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling nanorand v0.5.2
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling zerocopy-derive v0.3.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling zerocopy v0.5.0
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling pin-project v1.0.7
[INFO] [stderr]    Compiling flume v0.10.4
[INFO] [stderr]    Compiling haneru v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the type `[u8; 4096]` does not permit being left uninitialized
[INFO] [stdout]    --> src/slotted.rs:175:49
[INFO] [stdout]     |
[INFO] [stdout] 175 |         let mut buf: [u8; PAGE_SIZE] = unsafe { MaybeUninit::uninit().assume_init() };
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 this code causes undefined behavior when executed
[INFO] [stdout]     |                                                 help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: integers must be initialized
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `[u8; 4096]` does not permit being left uninitialized
[INFO] [stdout]    --> src/slotted_overflow.rs:313:49
[INFO] [stdout]     |
[INFO] [stdout] 313 |         let mut buf: [u8; PAGE_SIZE] = unsafe { MaybeUninit::uninit().assume_init() };
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 this code causes undefined behavior when executed
[INFO] [stdout]     |                                                 help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: integers must be initialized
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.74s
[INFO] running `Command { std: "docker" "inspect" "f2d866cac3b1493818920f5cbfea11bd9d32bfecc3ee8b8465cf44a88e3013e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2d866cac3b1493818920f5cbfea11bd9d32bfecc3ee8b8465cf44a88e3013e4", kill_on_drop: false }`
[INFO] [stdout] f2d866cac3b1493818920f5cbfea11bd9d32bfecc3ee8b8465cf44a88e3013e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 786003d91a81c1ec2ddacc89c262dd5f5bbee88a356dbab0be994d0eb3fa12fd
[INFO] running `Command { std: "docker" "start" "-a" "786003d91a81c1ec2ddacc89c262dd5f5bbee88a356dbab0be994d0eb3fa12fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]    Compiling regex-automata v0.1.9
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling futures-task v0.3.14
[INFO] [stderr]    Compiling plotters-backend v0.3.0
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling futures-util v0.3.14
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling mio v0.7.11
[INFO] [stderr]    Compiling plotters-svg v0.3.0
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling bstr v0.2.15
[INFO] [stderr]    Compiling cast v0.2.5
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling futures-channel v0.3.14
[INFO] [stderr]    Compiling futures-io v0.3.14
[INFO] [stderr]    Compiling regex-syntax v0.6.23
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.3
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling plotters v0.3.0
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling itertools v0.10.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stdout] warning: the type `[u8; 4096]` does not permit being left uninitialized
[INFO] [stdout]    --> src/slotted.rs:175:49
[INFO] [stdout]     |
[INFO] [stdout] 175 |         let mut buf: [u8; PAGE_SIZE] = unsafe { MaybeUninit::uninit().assume_init() };
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 this code causes undefined behavior when executed
[INFO] [stdout]     |                                                 help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: integers must be initialized
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `[u8; 4096]` does not permit being left uninitialized
[INFO] [stdout]    --> src/slotted_overflow.rs:313:49
[INFO] [stdout]     |
[INFO] [stdout] 313 |         let mut buf: [u8; PAGE_SIZE] = unsafe { MaybeUninit::uninit().assume_init() };
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 this code causes undefined behavior when executed
[INFO] [stdout]     |                                                 help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: integers must be initialized
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling regex v1.4.5
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling futures v0.3.14
[INFO] [stderr]    Compiling criterion v0.3.4
[INFO] [stderr]    Compiling haneru v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the type `[u8; 4096]` does not permit being left uninitialized
[INFO] [stdout]    --> src/slotted.rs:175:49
[INFO] [stdout]     |
[INFO] [stdout] 175 |         let mut buf: [u8; PAGE_SIZE] = unsafe { MaybeUninit::uninit().assume_init() };
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 this code causes undefined behavior when executed
[INFO] [stdout]     |                                                 help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: integers must be initialized
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `[u8; 4096]` does not permit being left uninitialized
[INFO] [stdout]    --> src/slotted_overflow.rs:313:49
[INFO] [stdout]     |
[INFO] [stdout] 313 |         let mut buf: [u8; PAGE_SIZE] = unsafe { MaybeUninit::uninit().assume_init() };
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                 |
[INFO] [stdout]     |                                                 this code causes undefined behavior when executed
[INFO] [stdout]     |                                                 help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: integers must be initialized
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 14.44s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "786003d91a81c1ec2ddacc89c262dd5f5bbee88a356dbab0be994d0eb3fa12fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "786003d91a81c1ec2ddacc89c262dd5f5bbee88a356dbab0be994d0eb3fa12fd", kill_on_drop: false }`
[INFO] [stdout] 786003d91a81c1ec2ddacc89c262dd5f5bbee88a356dbab0be994d0eb3fa12fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1b4793715a818388fa882b2d68bc0af8cae2375d950af06ff2a328aebe5cf800
[INFO] running `Command { std: "docker" "start" "-a" "1b4793715a818388fa882b2d68bc0af8cae2375d950af06ff2a328aebe5cf800", kill_on_drop: false }`
[INFO] [stderr] warning: the type `[u8; 4096]` does not permit being left uninitialized
[INFO] [stderr]    --> src/slotted.rs:175:49
[INFO] [stderr]     |
[INFO] [stderr] 175 |         let mut buf: [u8; PAGE_SIZE] = unsafe { MaybeUninit::uninit().assume_init() };
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                                                 |
[INFO] [stderr]     |                                                 this code causes undefined behavior when executed
[INFO] [stderr]     |                                                 help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stderr]     |
[INFO] [stderr]     = note: integers must be initialized
[INFO] [stderr]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the type `[u8; 4096]` does not permit being left uninitialized
[INFO] [stderr]    --> src/slotted_overflow.rs:313:49
[INFO] [stderr]     |
[INFO] [stderr] 313 |         let mut buf: [u8; PAGE_SIZE] = unsafe { MaybeUninit::uninit().assume_init() };
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                                                 |
[INFO] [stderr]     |                                                 this code causes undefined behavior when executed
[INFO] [stderr]     |                                                 help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stderr]     |
[INFO] [stderr]     = note: integers must be initialized
[INFO] [stderr] 
[INFO] [stderr] warning: `haneru` (lib) generated 2 warnings
[INFO] [stderr] warning: `haneru` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/haneru-867e7641d3e83927)
[INFO] [stdout] 
[INFO] [stdout] running 24 tests
[INFO] [stdout] test bsearch::tests::test ... ok
[INFO] [stdout] test memcmpable::tests::test ... ok
[INFO] [stdout] test slotted::tests::test ... ok
[INFO] [stdout] test slotted::tests::test_remove ... ok
[INFO] [stderr] 
[INFO] [stderr] thread '
[INFO] [stderr] thread 'btree::tests::test_insert_heightbtree::tests::test_insert_remove_height' has overflowed its stack
[INFO] [stderr] ' has overflowed its stack
[INFO] [stderr] fatal runtime error: fatal runtime error: stack overflow
[INFO] [stderr] stack overflow
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/haneru-867e7641d3e83927` (signal: 6, SIGABRT: process abort signal)
[INFO] running `Command { std: "docker" "inspect" "1b4793715a818388fa882b2d68bc0af8cae2375d950af06ff2a328aebe5cf800", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b4793715a818388fa882b2d68bc0af8cae2375d950af06ff2a328aebe5cf800", kill_on_drop: false }`
[INFO] [stdout] 1b4793715a818388fa882b2d68bc0af8cae2375d950af06ff2a328aebe5cf800
