[INFO] cloning repository https://github.com/saik0/rust_boggle_solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/saik0/rust_boggle_solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaik0%2Frust_boggle_solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaik0%2Frust_boggle_solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5d4602cdfe585c83c836f045adc675e23f9a6e37
[INFO] testing saik0/rust_boggle_solver against beta-2026-01-20 for beta-1.94-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaik0%2Frust_boggle_solver" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/saik0/rust_boggle_solver
[INFO] finished tweaking git repo https://github.com/saik0/rust_boggle_solver
[INFO] tweaked toml for git repo https://github.com/saik0/rust_boggle_solver written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/saik0/rust_boggle_solver on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/saik0/rust_boggle_solver 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-2026-01-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 518bd0a2191f4161bd37efb5071a69b9fc8173b2a8d71ee0b969b3b0101c6c1b
[INFO] running `Command { std: "docker" "start" "-a" "518bd0a2191f4161bd37efb5071a69b9fc8173b2a8d71ee0b969b3b0101c6c1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "518bd0a2191f4161bd37efb5071a69b9fc8173b2a8d71ee0b969b3b0101c6c1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "518bd0a2191f4161bd37efb5071a69b9fc8173b2a8d71ee0b969b3b0101c6c1b", kill_on_drop: false }`
[INFO] [stdout] 518bd0a2191f4161bd37efb5071a69b9fc8173b2a8d71ee0b969b3b0101c6c1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2f76a6791d663c0275966909500716513efa15696f09c40a7d02d953cd8a9e4
[INFO] running `Command { std: "docker" "start" "-a" "b2f76a6791d663c0275966909500716513efa15696f09c40a7d02d953cd8a9e4", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling libc v0.2.21
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling num_cpus v1.3.0
[INFO] [stderr]    Compiling deque v0.3.1
[INFO] [stderr]    Compiling rayon v0.6.0
[INFO] [stderr]    Compiling rust_boggle_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/boggle_util.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |         'a' ... 'z' => true,
[INFO] [stdout]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/boggle_util.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         'A' ... 'Z' => true,
[INFO] [stdout]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/boggle/radix_board.rs:66:26
[INFO] [stdout]    |
[INFO] [stdout] 66 |             alpha = mem::uninitialized();
[INFO] [stdout]    |                          ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/boggle/mod.rs:38:33
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn any(&self, v: u8) -> Box<Iterator<Item=usize>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn any(&self, v: u8) -> Box<dyn Iterator<Item=usize>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/boggle/mod.rs:39:49
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn neighbors(&self, i: usize, v: u8) -> Box<Iterator<Item=usize>>;
[INFO] [stdout]    |                                                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn neighbors(&self, i: usize, v: u8) -> Box<dyn Iterator<Item=usize>>;
[INFO] [stdout]    |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `BoggleBoard` is never used
[INFO] [stdout]   --> src/boggle/mod.rs:35:11
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub trait BoggleBoard {
[INFO] [stdout]    |           ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/bitset/bitset.rs:116:22
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn iter_ones(&self) -> IndexIter {
[INFO] [stdout]     |                      ^^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn iter_ones(&self) -> IndexIter<'_> {
[INFO] [stdout]     |                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/bitset/bitset_32.rs:74:17
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn iter(&self) -> Iter32 {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn iter(&self) -> Iter32<'_> {
[INFO] [stdout]    |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/bitset/bitset_32.rs:78:22
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn iter_ones(&self) -> IndexIter32 {
[INFO] [stdout]    |                      ^^^^^     ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn iter_ones(&self) -> IndexIter32<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/trie.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             mem::replace(&mut (self.children[first]), Some(Box::new(Trie::new())));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 82 |             let _ = mem::replace(&mut (self.children[first]), Some(Box::new(Trie::new())));
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/trie.rs:119:17
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn iter(&self) -> TrieIterator {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn iter(&self) -> TrieIterator<'_> {
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/boggle/simple_board.rs:99:17
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn iter(&self) -> std::slice::Iter<u8> {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn iter(&self) -> std::slice::Iter<'_, u8> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `[bitset::bitset::BitSet; 26]` does not permit being left uninitialized
[INFO] [stdout]   --> src/boggle/radix_board.rs:66:21
[INFO] [stdout]    |
[INFO] [stdout] 66 |             alpha = mem::uninitialized();
[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: `alloc::raw_vec::RawVec<u64>` must be initialized inside its custom valid range (in this struct field)
[INFO] [stdout]   --> src/bitset/bitset.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     data: Vec<u64>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    = note: because `alloc::raw_vec::RawVecInner` must be initialized inside its custom valid range
[INFO] [stdout]    = note: `std::ptr::Unique<u8>` must be non-null
[INFO] [stdout]    = note: because `std::ptr::NonNull<u8>` must be non-null
[INFO] [stdout]    = note: raw pointers must be initialized
[INFO] [stdout]    = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/boggle/radix_board.rs:94:16
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn any(&self, v: u8) -> IndexIter {
[INFO] [stdout]    |                ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn any(&self, v: u8) -> IndexIter<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.77s
[INFO] running `Command { std: "docker" "inspect" "b2f76a6791d663c0275966909500716513efa15696f09c40a7d02d953cd8a9e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2f76a6791d663c0275966909500716513efa15696f09c40a7d02d953cd8a9e4", kill_on_drop: false }`
[INFO] [stdout] b2f76a6791d663c0275966909500716513efa15696f09c40a7d02d953cd8a9e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e05042a522f89ff8284941a10fce7405b0cf33ec02a86ea7c35189d8c719247
[INFO] running `Command { std: "docker" "start" "-a" "4e05042a522f89ff8284941a10fce7405b0cf33ec02a86ea7c35189d8c719247", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling rust_boggle_solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/boggle_util.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |         'a' ... 'z' => true,
[INFO] [stdout]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/boggle_util.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         'A' ... 'Z' => true,
[INFO] [stdout]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/boggle/radix_board.rs:66:26
[INFO] [stdout]    |
[INFO] [stdout] 66 |             alpha = mem::uninitialized();
[INFO] [stdout]    |                          ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/boggle/mod.rs:38:33
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn any(&self, v: u8) -> Box<Iterator<Item=usize>>;
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn any(&self, v: u8) -> Box<dyn Iterator<Item=usize>>;
[INFO] [stdout]    |                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/boggle/mod.rs:39:49
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn neighbors(&self, i: usize, v: u8) -> Box<Iterator<Item=usize>>;
[INFO] [stdout]    |                                                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn neighbors(&self, i: usize, v: u8) -> Box<dyn Iterator<Item=usize>>;
[INFO] [stdout]    |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `BoggleBoard` is never used
[INFO] [stdout]   --> src/boggle/mod.rs:35:11
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub trait BoggleBoard {
[INFO] [stdout]    |           ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/bitset/bitset.rs:116:22
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn iter_ones(&self) -> IndexIter {
[INFO] [stdout]     |                      ^^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn iter_ones(&self) -> IndexIter<'_> {
[INFO] [stdout]     |                                         ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/bitset/bitset_32.rs:74:17
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn iter(&self) -> Iter32 {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub fn iter(&self) -> Iter32<'_> {
[INFO] [stdout]    |                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/bitset/bitset_32.rs:78:22
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn iter_ones(&self) -> IndexIter32 {
[INFO] [stdout]    |                      ^^^^^     ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 78 |     pub fn iter_ones(&self) -> IndexIter32<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/trie.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             mem::replace(&mut (self.children[first]), Some(Box::new(Trie::new())));
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 82 |             let _ = mem::replace(&mut (self.children[first]), Some(Box::new(Trie::new())));
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/trie.rs:119:17
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn iter(&self) -> TrieIterator {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn iter(&self) -> TrieIterator<'_> {
[INFO] [stdout]     |                                       ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/boggle/simple_board.rs:99:17
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn iter(&self) -> std::slice::Iter<u8> {
[INFO] [stdout]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 99 |     pub fn iter(&self) -> std::slice::Iter<'_, u8> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `[bitset::bitset::BitSet; 26]` does not permit being left uninitialized
[INFO] [stdout]   --> src/boggle/radix_board.rs:66:21
[INFO] [stdout]    |
[INFO] [stdout] 66 |             alpha = mem::uninitialized();
[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: `alloc::raw_vec::RawVec<u64>` must be initialized inside its custom valid range (in this struct field)
[INFO] [stdout]   --> src/bitset/bitset.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     data: Vec<u64>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    = note: because `alloc::raw_vec::RawVecInner` must be initialized inside its custom valid range
[INFO] [stdout]    = note: `std::ptr::Unique<u8>` must be non-null
[INFO] [stdout]    = note: because `std::ptr::NonNull<u8>` must be non-null
[INFO] [stdout]    = note: raw pointers must be initialized
[INFO] [stdout]    = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/boggle/radix_board.rs:94:16
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn any(&self, v: u8) -> IndexIter {
[INFO] [stdout]    |                ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn any(&self, v: u8) -> IndexIter<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "4e05042a522f89ff8284941a10fce7405b0cf33ec02a86ea7c35189d8c719247", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e05042a522f89ff8284941a10fce7405b0cf33ec02a86ea7c35189d8c719247", kill_on_drop: false }`
[INFO] [stdout] 4e05042a522f89ff8284941a10fce7405b0cf33ec02a86ea7c35189d8c719247
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9c289ff5cc61e74a22cb030016758ab2060192bfb9745daba2ed1cf13d519cbf
[INFO] running `Command { std: "docker" "start" "-a" "9c289ff5cc61e74a22cb030016758ab2060192bfb9745daba2ed1cf13d519cbf", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/boggle_util.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |         'a' ... 'z' => true,
[INFO] [stderr]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/boggle_util.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |         'A' ... 'Z' => true,
[INFO] [stderr]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stderr]   --> src/boggle/radix_board.rs:66:26
[INFO] [stderr]    |
[INFO] [stderr] 66 |             alpha = mem::uninitialized();
[INFO] [stderr]    |                          ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/boggle/mod.rs:38:33
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn any(&self, v: u8) -> Box<Iterator<Item=usize>>;
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn any(&self, v: u8) -> Box<dyn Iterator<Item=usize>>;
[INFO] [stderr]    |                                 +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout] 
[INFO] [stderr]   --> src/boggle/mod.rs:39:49
[INFO] [stdout] running 13 tests
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn neighbors(&self, i: usize, v: u8) -> Box<Iterator<Item=usize>>;
[INFO] [stderr]    |                                                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn neighbors(&self, i: usize, v: u8) -> Box<dyn Iterator<Item=usize>>;
[INFO] [stderr]    |                                                 +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait `BoggleBoard` is never used
[INFO] [stderr]   --> src/boggle/mod.rs:35:11
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub trait BoggleBoard {
[INFO] [stderr]    |           ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/bitset/bitset.rs:116:22
[INFO] [stderr]     |
[INFO] [stderr] 116 |     pub fn iter_ones(&self) -> IndexIter {
[INFO] [stderr]     |                      ^^^^^     ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 116 |     pub fn iter_ones(&self) -> IndexIter<'_> {
[INFO] [stderr]     |                                         ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/bitset/bitset_32.rs:74:17
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn iter(&self) -> Iter32 {
[INFO] [stderr]    |                 ^^^^^     ^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn iter(&self) -> Iter32<'_> {
[INFO] [stderr]    |                                 ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/bitset/bitset_32.rs:78:22
[INFO] [stderr]    |
[INFO] [stderr] 78 |     pub fn iter_ones(&self) -> IndexIter32 {
[INFO] [stderr]    |                      ^^^^^     ^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                      |
[INFO] [stderr]    |                      the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 78 |     pub fn iter_ones(&self) -> IndexIter32<'_> {
[INFO] [stderr]    |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/trie.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |             mem::replace(&mut (self.children[first]), Some(Box::new(Trie::new())));
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 82 |             let _ = mem::replace(&mut (self.children[first]), Some(Box::new(Trie::new())));
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/trie.rs:119:17
[INFO] [stderr]     |
[INFO] [stderr] 119 |     pub fn iter(&self) -> TrieIterator {
[INFO] [stderr]     |                 ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 119 |     pub fn iter(&self) -> TrieIterator<'_> {
[INFO] [stderr]     |                                       ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/boggle/simple_board.rs:99:17
[INFO] [stderr]    |
[INFO] [stderr] 99 |     pub fn iter(&self) -> std::slice::Iter<u8> {
[INFO] [stderr]    |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 99 |     pub fn iter(&self) -> std::slice::Iter<'_, u8> {
[INFO] [stderr]    |                                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: the type `[bitset::bitset::BitSet; 26]` does not permit being left uninitialized
[INFO] [stderr]   --> src/boggle/radix_board.rs:66:21
[INFO] [stderr]    |
[INFO] [stderr] 66 |             alpha = mem::uninitialized();
[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: `alloc::raw_vec::RawVec<u64>` must be initialized inside its custom valid range (in this struct field)
[INFO] [stderr]   --> src/bitset/bitset.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     data: Vec<u64>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    = note: because `alloc::raw_vec::RawVecInner` must be initialized inside its custom valid range
[INFO] [stderr]    = note: `std::ptr::Unique<u8>` must be non-null
[INFO] [stderr]    = note: because `std::ptr::NonNull<u8>` must be non-null
[INFO] [stderr]    = note: raw pointers must be initialized
[INFO] [stderr]    = note: `#[warn(invalid_value)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/boggle/radix_board.rs:94:16
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn any(&self, v: u8) -> IndexIter {
[INFO] [stderr]    |                ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                |
[INFO] [stderr]    |                the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn any(&self, v: u8) -> IndexIter<'_> {
[INFO] [stderr]    |                                          ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_boggle_solver` (bin "rust_boggle_solver" test) generated 14 warnings (run `cargo fix --bin "rust_boggle_solver" -p rust_boggle_solver --tests` to apply 10 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_boggle_solver-4d569289de767bf8)
[INFO] [stdout] test bitset::bitset::test::can_add ... ok
[INFO] [stdout] test bitset::bitset::test::can_iter_indices ... ok
[INFO] [stdout] test bitset::bitset::test::len_is_correct ... ok
[INFO] [stdout] test bitset::bitset::test::can_remove ... ok
[INFO] [stderr] 
[INFO] [stderr] thread 'trie::test::invalid_words_are_not_inserted' (28) panicked at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/str/validations.rs:48:36:
[INFO] [stderr] unsafe precondition(s) violated: hint::unreachable_unchecked must never be reached
[INFO] [stderr] 
[INFO] [stderr] This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x601ed9297642 - std::backtrace_rs::backtrace::libunwind::trace::hf0bd46b30bc61685
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]    1:     0x601ed9297642 - std::backtrace_rs::backtrace::trace_unsynchronized::h1d1fbb72ad89d7b7
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]    2:     0x601ed9297642 - std::sys::backtrace::_print_fmt::he38b6f68ca847f47
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:74:9
[INFO] [stderr]    3:     0x601ed9297642 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb7e843cde1bc81a3
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:44:26
[INFO] [stderr]    4:     0x601ed92a854a - core::fmt::rt::Argument::fmt::hc1dd77ac64f2688c
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]    5:     0x601ed92a854a - core::fmt::write::h952c506e2dbe9cff
[INFO] [stderr]    6:     0x601ed92664a6 - std::io::default_write_fmt::h72db0b4dbd5dcfa2
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:639:11
[INFO] [stderr]    7:     0x601ed92664a6 - std::io::Write::write_fmt::hb496f2b9b027aa16
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:1994:13
[INFO] [stderr]    8:     0x601ed9276b29 - std::sys::backtrace::BacktraceLock::print::h1079b82381c2c252
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:47:9
[INFO] [stderr]    9:     0x601ed9276b29 - std::panicking::default_hook::{{closure}}::h85cb76b8462c00f2
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:292:27
[INFO] [stderr]   10:     0x601ed9276989 - std::panicking::default_hook::h0134d220cc034c02
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:319:9
[INFO] [stderr]   11:     0x601ed923a93e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb2e68dca3970e3ca
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stderr]   12:     0x601ed923a93e - test::test_main_with_exit_callback::{{closure}}::ha7ec2063a2565ec3
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:145:21
[INFO] [stderr]   13:     0x601ed9276da2 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::haebee478d0f56cf4
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stderr]   14:     0x601ed9276da2 - std::panicking::panic_with_hook::h8119b6db1fef734f
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:833:13
[INFO] [stderr]   15:     0x601ed9276c1a - std::panicking::panic_handler::{{closure}}::h24f5360b91482c0e
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:691:13
[INFO] [stderr]   16:     0x601ed9272179 - std::sys::backtrace::__rust_end_short_backtrace::h4e60c5cbd1bd0108
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:182:18
[INFO] [stderr]   17:     0x601ed925b1bd - __rustc[e4c6931bd8050421]::rust_begin_unwind
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:689:5
[INFO] [stderr]   18:     0x601ed92afaad - core::panicking::panic_nounwind_fmt::runtime::hdd333623f60f3530
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:122:22
[INFO] [stderr]   19:     0x601ed92afaad - core::panicking::panic_nounwind_fmt::ha2bdc0d440fd6df8
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/intrinsics/mod.rs:2432:9
[INFO] [stderr]   20:     0x601ed925aa10 - core::hint::unreachable_unchecked::precondition_check::ha720e1980855c6d3
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ub_checks.rs:73:21
[INFO] [stderr]   21:     0x601ed925ad54 - core::hint::unreachable_unchecked::h1a60fc8cd97306dd
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ub_checks.rs:78:17
[INFO] [stderr]   22:     0x601ed925ad54 - core::option::Option<T>::unwrap_unchecked::hf527aae83bc34907
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/option.rs:1132:30
[INFO] [stderr]   23:     0x601ed925ad54 - core::str::validations::next_code_point::h2f14d938f22b08b9
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/str/validations.rs:48:36
[INFO] [stderr]   24:     0x601ed921b88f - <core::str::iter::Chars as core::iter::traits::iterator::Iterator>::next::h0f711d624966e51a
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/str/iter.rs:42:18
[INFO] [stderr]   25:     0x601ed921af2d - core::iter::traits::iterator::Iterator::try_fold::hb23c2e02a0af76cc
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/iter/traits/iterator.rs:2433:34
[INFO] [stderr]   26:     0x601ed921adfe - core::iter::traits::iterator::Iterator::all::he168e6ef7234ebd9
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/iter/traits/iterator.rs:2780:14
[INFO] [stderr]   27:     0x601ed9218a87 - rust_boggle_solver::boggle_util::is_alpha::h962591d2247372fb
[INFO] [stderr]                                at /opt/rustwide/workdir/src/boggle_util.rs:34:15
[INFO] [stderr]   28:     0x601ed9219171 - rust_boggle_solver::trie::Trie::insert::h77178f3e3b9227ce
[INFO] [stderr]                                at /opt/rustwide/workdir/src/trie.rs:68:9
[INFO] [stderr]   29:     0x601ed9219d9c - rust_boggle_solver::trie::test::invalid_words_are_not_inserted::h9fb02eb031a80388
[INFO] [stderr]                                at /opt/rustwide/workdir/src/trie.rs:191:27
[INFO] [stderr]   30:     0x601ed9219f17 - rust_boggle_solver::trie::test::invalid_words_are_not_inserted::{{closure}}::h6e596507d0b7882e
[INFO] [stderr]                                at /opt/rustwide/workdir/src/trie.rs:182:40
[INFO] [stderr]   31:     0x601ed921a9a6 - core::ops::function::FnOnce::call_once::hf1337ef381dbd96b
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   32:     0x601ed923a73b - core::ops::function::FnOnce::call_once::hefaf63600cd43d2a
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   33:     0x601ed923a73b - test::__rust_begin_short_backtrace::he30322a73a0e9ea6
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:663:18
[INFO] [stderr]   34:     0x601ed924e10a - test::run_test_in_process::{{closure}}::hdea3ab8d0243ef36
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:74
[INFO] [stderr]   35:     0x601ed924e10a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h66d192f42498ffce
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stderr]   36:     0x601ed924e10a - std::panicking::catch_unwind::do_call::h822e18e8d3a6bb65
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stderr]   37:     0x601ed924e10a - std::panicking::catch_unwind::h54b1de7ceab578bf
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stderr]   38:     0x601ed924e10a - std::panic::catch_unwind::h60c29b7a9d0246b1
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stderr]   39:     0x601ed924e10a - test::run_test_in_process::h6099b5f871379b13
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:27
[INFO] [stderr]   40:     0x601ed924e10a - test::run_test::{{closure}}::h926ce0a38281a4c8
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:607:43
[INFO] [stderr]   41:     0x601ed9228564 - test::run_test::{{closure}}::h508de21a9afc7140
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:637:41
[INFO] [stderr]   42:     0x601ed9228564 - std::sys::backtrace::__rust_begin_short_backtrace::h6e2f5c39ca00735a
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:166:18
[INFO] [stderr]   43:     0x601ed922be22 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::h133e44f0e5802c14
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stderr]   44:     0x601ed922be22 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4718c1285283955c
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stderr]   45:     0x601ed922be22 - std::panicking::catch_unwind::do_call::h0bba3937b4892238
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stderr]   46:     0x601ed922be22 - std::panicking::catch_unwind::h5b31cab5fb8c5d7f
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stderr]   47:     0x601ed922be22 - std::panic::catch_unwind::hb2fa05d52ed0124e
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stderr]   48:     0x601ed922be22 - std::thread::lifecycle::spawn_unchecked::{{closure}}::hf401cf5ff501bd29
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stderr]   49:     0x601ed922be22 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h160022e94ce3b0bb
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   50:     0x601ed926d40f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf234e0d1d1d272ba
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2206:9
[INFO] [stderr]   51:     0x601ed926d40f - std::sys::thread::unix::Thread::new::thread_start::h106a295241840d3b
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stderr]   52:     0x78d7f705baa4 - <unknown>
[INFO] [stderr]   53:     0x78d7f70e8a64 - clone
[INFO] [stderr]   54:                0x0 - <unknown>
[INFO] [stderr] thread caused non-unwinding panic. aborting.
[INFO] [stderr] error: test failed, to rerun pass `--bin rust_boggle_solver`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/rust_boggle_solver-4d569289de767bf8` (signal: 6, SIGABRT: process abort signal)
[INFO] [stdout] test bitset::bitset_32::test::can_iter_ones ... 
[INFO] running `Command { std: "docker" "inspect" "9c289ff5cc61e74a22cb030016758ab2060192bfb9745daba2ed1cf13d519cbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c289ff5cc61e74a22cb030016758ab2060192bfb9745daba2ed1cf13d519cbf", kill_on_drop: false }`
[INFO] [stdout] 9c289ff5cc61e74a22cb030016758ab2060192bfb9745daba2ed1cf13d519cbf
