[INFO] fetching crate typed-arena 2.0.2...
[INFO] testing typed-arena-2.0.2 against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] extracting crate typed-arena 2.0.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate typed-arena 2.0.2
[INFO] finished tweaking crates.io crate typed-arena 2.0.2
[INFO] tweaked toml for crates.io crate typed-arena 2.0.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate typed-arena 2.0.2 on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "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" "+33835004928d3bf65db4d4712e1330766263b0bd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 68 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.8.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 164ab8e8c84ffaedc631eb3e6a583b2564ae56db306ea8430696bc66ed305083
[INFO] running `Command { std: "docker" "start" "-a" "164ab8e8c84ffaedc631eb3e6a583b2564ae56db306ea8430696bc66ed305083", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "164ab8e8c84ffaedc631eb3e6a583b2564ae56db306ea8430696bc66ed305083", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "164ab8e8c84ffaedc631eb3e6a583b2564ae56db306ea8430696bc66ed305083", kill_on_drop: false }`
[INFO] [stdout] 164ab8e8c84ffaedc631eb3e6a583b2564ae56db306ea8430696bc66ed305083
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee9a9213e6f2d062c64ecf4805f67a88876818bcdf399d2513e6f56ef855d0b0
[INFO] running `Command { std: "docker" "start" "-a" "ee9a9213e6f2d062c64ecf4805f67a88876818bcdf399d2513e6f56ef855d0b0", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling typed-arena v2.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:495:21
[INFO] [stdout]     |
[INFO] [stdout] 495 |     pub fn iter_mut(&mut self) -> IterMut<T> {
[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] 495 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "ee9a9213e6f2d062c64ecf4805f67a88876818bcdf399d2513e6f56ef855d0b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee9a9213e6f2d062c64ecf4805f67a88876818bcdf399d2513e6f56ef855d0b0", kill_on_drop: false }`
[INFO] [stdout] ee9a9213e6f2d062c64ecf4805f67a88876818bcdf399d2513e6f56ef855d0b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ae85249e3a257a8d7a8a132567c9b28fe9a026cb7b77fd490dc4830c64d30c8
[INFO] running `Command { std: "docker" "start" "-a" "9ae85249e3a257a8d7a8a132567c9b28fe9a026cb7b77fd490dc4830c64d30c8", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling csv-core v0.1.13
[INFO] [stderr]    Compiling half v1.8.3
[INFO] [stderr]    Compiling criterion-plot v0.4.5
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:495:21
[INFO] [stdout]     |
[INFO] [stdout] 495 |     pub fn iter_mut(&mut self) -> IterMut<T> {
[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] 495 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]     |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling csv v1.4.0
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling criterion v0.3.6
[INFO] [stderr]    Compiling typed-arena v2.0.2 (/opt/rustwide/workdir)
[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:495:21
[INFO] [stdout]     |
[INFO] [stdout] 495 |     pub fn iter_mut(&mut self) -> IterMut<T> {
[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] 495 |     pub fn iter_mut(&mut self) -> IterMut<'_, 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] error: implicit autoref creates a reference to the dereference of a raw pointer
[INFO] [stdout]    --> src/test.rs:170:17
[INFO] [stdout]     |
[INFO] [stdout] 170 |         assert!((*uninitialized).len() >= 2);
[INFO] [stdout]     |                 ^^-------------^^^^^^^
[INFO] [stdout]     |                   |
[INFO] [stdout]     |                   this raw pointer has type `*mut [MaybeUninit<Dropper>]`
[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<Dropper>]`
[INFO] [stdout]    --> src/test.rs:170:17
[INFO] [stdout]     |
[INFO] [stdout] 170 |         assert!((*uninitialized).len() >= 2);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^
[INFO] [stdout] note: method calls to `len` require a reference
[INFO] [stdout]    --> /rustc/33835004928d3bf65db4d4712e1330766263b0bd/library/core/src/slice/mod.rs:116:4
[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] 170 |         assert!((&(*uninitialized)).len() >= 2);
[INFO] [stdout]     |                 ++                +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `typed-arena` (lib test) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "9ae85249e3a257a8d7a8a132567c9b28fe9a026cb7b77fd490dc4830c64d30c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ae85249e3a257a8d7a8a132567c9b28fe9a026cb7b77fd490dc4830c64d30c8", kill_on_drop: false }`
[INFO] [stdout] 9ae85249e3a257a8d7a8a132567c9b28fe9a026cb7b77fd490dc4830c64d30c8
