[INFO] fetching crate typed-arena-nomut 0.1.0... [INFO] testing typed-arena-nomut-0.1.0 against beta-2025-09-21 for beta-1.91-3 [INFO] extracting crate typed-arena-nomut 0.1.0 into /workspace/builds/worker-5-tc2/source [INFO] started tweaking crates.io crate typed-arena-nomut 0.1.0 [INFO] finished tweaking crates.io crate typed-arena-nomut 0.1.0 [INFO] tweaked toml for crates.io crate typed-arena-nomut 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate typed-arena-nomut 0.1.0 on toolchain beta-2025-09-21 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 64 packages to latest compatible versions [INFO] [stderr] Adding criterion v0.3.6 (available: v0.7.0) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 14c9a2bf6a44c9af5df3595d7e3aa2b071bbca0c721ea45453714a0b78c6f073 [INFO] running `Command { std: "docker" "start" "-a" "14c9a2bf6a44c9af5df3595d7e3aa2b071bbca0c721ea45453714a0b78c6f073", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "14c9a2bf6a44c9af5df3595d7e3aa2b071bbca0c721ea45453714a0b78c6f073", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "14c9a2bf6a44c9af5df3595d7e3aa2b071bbca0c721ea45453714a0b78c6f073", kill_on_drop: false }` [INFO] [stdout] 14c9a2bf6a44c9af5df3595d7e3aa2b071bbca0c721ea45453714a0b78c6f073 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 73cab3d3b683aa96dc365bf0f0cd8c17fe1b21e42458e17036674fd9c739d677 [INFO] running `Command { std: "docker" "start" "-a" "73cab3d3b683aa96dc365bf0f0cd8c17fe1b21e42458e17036674fd9c739d677", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] Compiling typed-arena-nomut v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/lib.rs:493:17 [INFO] [stdout] | [INFO] [stdout] 493 | pub fn iter(&self) -> Iter { [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] 493 | pub fn iter(&self) -> Iter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s [INFO] running `Command { std: "docker" "inspect" "73cab3d3b683aa96dc365bf0f0cd8c17fe1b21e42458e17036674fd9c739d677", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "73cab3d3b683aa96dc365bf0f0cd8c17fe1b21e42458e17036674fd9c739d677", kill_on_drop: false }` [INFO] [stdout] 73cab3d3b683aa96dc365bf0f0cd8c17fe1b21e42458e17036674fd9c739d677 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 69c0e7484f7c2d5154d43516dd4f8a7e7eb0c66dbd073c1c13102e7232ab8dcc [INFO] running `Command { std: "docker" "start" "-a" "69c0e7484f7c2d5154d43516dd4f8a7e7eb0c66dbd073c1c13102e7232ab8dcc", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] Compiling typed-arena-nomut v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/lib.rs:493:17 [INFO] [stdout] | [INFO] [stdout] 493 | pub fn iter(&self) -> Iter { [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] 493 | pub fn iter(&self) -> Iter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `2` is never read [INFO] [stdout] --> src/test.rs:14:56 [INFO] [stdout] | [INFO] [stdout] 14 | struct Node<'a, 'b: 'a>(Option<&'a Node<'a, 'b>>, u32, DropTracker<'b>); [INFO] [stdout] | ---- field in this struct ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [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/lib.rs:493:17 [INFO] [stdout] | [INFO] [stdout] 493 | pub fn iter(&self) -> Iter { [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] 493 | pub fn iter(&self) -> Iter<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> src/test.rs:42:9 [INFO] [stdout] | [INFO] [stdout] 42 | mem::drop(node); [INFO] [stdout] | ^^^^^^^^^^----^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&Node<'_, '_>` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dropping_references)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 42 - mem::drop(node); [INFO] [stdout] 42 + let _ = node; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: implicit autoref creates a reference to the dereference of a raw pointer [INFO] [stdout] --> src/test.rs:167:17 [INFO] [stdout] | [INFO] [stdout] 167 | assert!((*uninitialized).len() >= 2); [INFO] [stdout] | ^^-------------^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this raw pointer has type `*mut [MaybeUninit]` [INFO] [stdout] | [INFO] [stdout] = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements [INFO] [stdout] note: autoref is being applied to this expression, resulting in: `&[MaybeUninit]` [INFO] [stdout] --> src/test.rs:167:17 [INFO] [stdout] | [INFO] [stdout] 167 | assert!((*uninitialized).len() >= 2); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] note: method calls to `len` require a reference [INFO] [stdout] --> /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/slice/mod.rs:114:5 [INFO] [stdout] = note: `#[warn(dangerous_implicit_autorefs)]` on by default [INFO] [stdout] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit [INFO] [stdout] | [INFO] [stdout] 167 | assert!((&(*uninitialized)).len() >= 2); [INFO] [stdout] | ++ + [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 1.13s [INFO] running `Command { std: "docker" "inspect" "69c0e7484f7c2d5154d43516dd4f8a7e7eb0c66dbd073c1c13102e7232ab8dcc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "69c0e7484f7c2d5154d43516dd4f8a7e7eb0c66dbd073c1c13102e7232ab8dcc", kill_on_drop: false }` [INFO] [stdout] 69c0e7484f7c2d5154d43516dd4f8a7e7eb0c66dbd073c1c13102e7232ab8dcc [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 0535eea45c5e56863f93db172a0b24f4c8d1c4f0de40b5a12fe10fb1cfd96e42 [INFO] running `Command { std: "docker" "start" "-a" "0535eea45c5e56863f93db172a0b24f4c8d1c4f0de40b5a12fe10fb1cfd96e42", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stderr] --> src/lib.rs:493:17 [INFO] [stderr] | [INFO] [stderr] 493 | pub fn iter(&self) -> Iter { [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] 493 | pub fn iter(&self) -> Iter<'_, T> { [INFO] [stderr] | +++ [INFO] [stderr] [INFO] [stderr] warning: `typed-arena-nomut` (lib) generated 1 warning (run `cargo fix --lib -p typed-arena-nomut` to apply 1 suggestion) [INFO] [stderr] warning: field `2` is never read [INFO] [stderr] --> src/test.rs:14:56 [INFO] [stderr] | [INFO] [stderr] 14 | struct Node<'a, 'b: 'a>(Option<&'a Node<'a, 'b>>, u32, DropTracker<'b>); [INFO] [stderr] | ---- field in this struct ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: consider removing this field [INFO] [stderr] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stderr] --> src/test.rs:42:9 [INFO] [stderr] | [INFO] [stderr] 42 | mem::drop(node); [INFO] [stderr] | ^^^^^^^^^^----^ [INFO] [stderr] | | [INFO] [stderr] | argument has type `&Node<'_, '_>` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dropping_references)]` on by default [INFO] [stderr] help: use `let _ = ...` to ignore the expression or result [INFO] [stderr] | [INFO] [stderr] 42 - mem::drop(node); [INFO] [stderr] 42 + let _ = node; [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] warning: implicit autoref creates a reference to the dereference of a raw pointer [INFO] [stderr] --> src/test.rs:167:17 [INFO] [stderr] | [INFO] [stderr] 167 | assert!((*uninitialized).len() >= 2); [INFO] [stderr] | ^^-------------^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | this raw pointer has type `*mut [MaybeUninit]` [INFO] [stderr] | [INFO] [stderr] = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements [INFO] [stderr] note: autoref is being applied to this expression, resulting in: `&[MaybeUninit]` [INFO] [stderr] --> src/test.rs:167:17 [INFO] [stderr] | [INFO] [stderr] 167 | assert!((*uninitialized).len() >= 2); [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] note: method calls to `len` require a reference [INFO] [stderr] --> /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/slice/mod.rs:114:5 [INFO] [stderr] = note: `#[warn(dangerous_implicit_autorefs)]` on by default [INFO] [stderr] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit [INFO] [stderr] | [INFO] [stderr] 167 | assert!((&(*uninitialized)).len() >= 2); [INFO] [stderr] | ++ + [INFO] [stderr] [INFO] [stderr] warning: `typed-arena-nomut` (lib test) generated 4 warnings (1 duplicate) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/typed_arena_nomut-575cc26b5a6e6b21) [INFO] [stdout] [INFO] [stdout] running 17 tests [INFO] [stdout] test test::arena_as_intended ... ok [INFO] [stdout] test test::arena_is_send ... ok [INFO] [stdout] test test::ensure_into_vec_maintains_order_of_allocation ... ok [INFO] [stdout] test test::size_hint ... ok [INFO] [stdout] test test::test_alloc_extend ... ok [INFO] [stdout] test test::iter_mut_low_capacity ... ok [INFO] [stdout] test test::test_alloc_extend_with_drop_counter ... ok [INFO] [stdout] test test::test_alloc_uninitialized ... ok [INFO] [stdout] test test::test_alloc_uninitialized_bools ... ok [INFO] [stdout] test test::iter_mut_high_capacity ... ok [INFO] [stdout] test test::test_uninitialized_array ... ok [INFO] [stdout] test test::test_zero_cap ... ok [INFO] [stdout] test test::dont_trust_the_iterator_size ... ok [INFO] [stdout] test test::alloc_uninitialized_with_panic ... ok [INFO] [stdout] test test::size_hint_high_initial_capacities ... ok [INFO] [stdout] test test::size_hint_low_initial_capacities ... ok [INFO] [stdout] test test::size_hint_many_items ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 17 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.79s [INFO] [stdout] [INFO] [stderr] Doc-tests typed_arena_nomut [INFO] [stdout] [INFO] [stdout] running 14 tests [INFO] [stdout] test src/lib.rs - Arena::alloc_uninitialized (line 320) ... FAILED [INFO] [stdout] test src/lib.rs - Arena::alloc (line 179) ... ok [INFO] [stdout] test src/lib.rs - Arena::into_vec (line 418) ... ok [INFO] [stdout] test src/lib.rs - Arena::alloc_extend (line 216) ... ok [INFO] [stdout] test src/lib.rs - (line 16) ... ok [INFO] [stdout] test src/lib.rs - Arena::new (line 117) ... ok [INFO] [stdout] test src/lib.rs - Arena::alloc_uninitialized (line 290) ... ok [INFO] [stdout] test src/lib.rs - Arena::with_capacity (line 132) ... ok [INFO] [stdout] test src/lib.rs - Arena::len (line 154) ... ok [INFO] [stdout] test src/lib.rs - Arena::alloc_str (line 524) ... ok [INFO] [stdout] test src/lib.rs - (line 35) ... ok [INFO] [stdout] test src/lib.rs - Arena (line 91) ... ok [INFO] [stdout] test src/lib.rs - Arena::iter (line 479) ... ok [INFO] [stdout] test src/lib.rs - Arena::iter (line 452) ... ok [INFO] [stderr] error: doctest failed, to rerun pass `--doc` [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] [INFO] [stdout] ---- src/lib.rs - Arena::alloc_uninitialized (line 320) stdout ---- [INFO] [stdout] error: implicit autoref creates a reference to the dereference of a raw pointer [INFO] [stdout] --> src/lib.rs:339:13 [INFO] [stdout] | [INFO] [stdout] 22 | assert!((*uninitialized).len() >= COUNT); // Ensured by the reserve_extend [INFO] [stdout] | ^^-------------^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this raw pointer has type `*mut [MaybeUninit]` [INFO] [stdout] | [INFO] [stdout] = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements [INFO] [stdout] note: autoref is being applied to this expression, resulting in: `&[MaybeUninit]` [INFO] [stdout] --> src/lib.rs:339:13 [INFO] [stdout] | [INFO] [stdout] 22 | assert!((*uninitialized).len() >= COUNT); // Ensured by the reserve_extend [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] note: method calls to `len` require a reference [INFO] [stdout] --> /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/slice/mod.rs:114:5 [INFO] [stdout] = note: `#[deny(dangerous_implicit_autorefs)]` on by default [INFO] [stdout] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit [INFO] [stdout] | [INFO] [stdout] 22 | assert!((&(*uninitialized)).len() >= COUNT); // Ensured by the reserve_extend [INFO] [stdout] | ++ + [INFO] [stdout] [INFO] [stdout] error: implicit autoref creates a reference to the dereference of a raw pointer [INFO] [stdout] --> src/lib.rs:340:22 [INFO] [stdout] | [INFO] [stdout] 23 | for elem in &mut (*uninitialized)[..COUNT] { [INFO] [stdout] | ^^-------------^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | this raw pointer has type `*mut [MaybeUninit]` [INFO] [stdout] | [INFO] [stdout] = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements [INFO] [stdout] note: autoref is being applied to this expression, resulting in: `&mut [MaybeUninit]` [INFO] [stdout] --> src/lib.rs:340:22 [INFO] [stdout] | [INFO] [stdout] 23 | for elem in &mut (*uninitialized)[..COUNT] { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit [INFO] [stdout] | [INFO] [stdout] 23 | for elem in &mut (&mut (*uninitialized))[..COUNT] { [INFO] [stdout] | +++++ + [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors [INFO] [stdout] [INFO] [stdout] Couldn't compile the test. [INFO] [stdout] [INFO] [stdout] failures: [INFO] [stdout] src/lib.rs - Arena::alloc_uninitialized (line 320) [INFO] [stdout] [INFO] [stdout] test result: FAILED. 13 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.10s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "0535eea45c5e56863f93db172a0b24f4c8d1c4f0de40b5a12fe10fb1cfd96e42", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0535eea45c5e56863f93db172a0b24f4c8d1c4f0de40b5a12fe10fb1cfd96e42", kill_on_drop: false }` [INFO] [stdout] 0535eea45c5e56863f93db172a0b24f4c8d1c4f0de40b5a12fe10fb1cfd96e42