[INFO] fetching crate nstack 0.16.0...
[INFO] testing nstack-0.16.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate nstack 0.16.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate nstack 0.16.0
[INFO] finished tweaking crates.io crate nstack 0.16.0
[INFO] tweaked toml for crates.io crate nstack 0.16.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate nstack 0.16.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "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-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 88b4c9b60694ff3583396e1d1c4408d35d1a22fb6fddc195cd200f39c8c93832
[INFO] running `Command { std: "docker" "start" "-a" "88b4c9b60694ff3583396e1d1c4408d35d1a22fb6fddc195cd200f39c8c93832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "88b4c9b60694ff3583396e1d1c4408d35d1a22fb6fddc195cd200f39c8c93832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88b4c9b60694ff3583396e1d1c4408d35d1a22fb6fddc195cd200f39c8c93832", kill_on_drop: false }`
[INFO] [stdout] 88b4c9b60694ff3583396e1d1c4408d35d1a22fb6fddc195cd200f39c8c93832
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 777bbd625456643f392ed7ca121988597ed1def5fd62bcd92be10a9e509f1935
[INFO] running `Command { std: "docker" "start" "-a" "777bbd625456643f392ed7ca121988597ed1def5fd62bcd92be10a9e509f1935", kill_on_drop: false }`
[INFO] [stderr]    Compiling ranno v0.1.0
[INFO] [stderr]    Compiling microkelvin v0.17.0
[INFO] [stderr]    Compiling nstack v0.16.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:53:14
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn child(&self, index: usize) -> Child<Self, A> {
[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] 53 |     fn child(&self, index: usize) -> Child<'_, Self, A> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:67:18
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn child_mut(&mut self, index: usize) -> ChildMut<Self, A> {
[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] 67 |     fn child_mut(&mut self, index: usize) -> ChildMut<'_, Self, A> {
[INFO] [stdout]    |                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/index.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn nth(&self, index: u64) -> Option<Branch<Self, A>> {
[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] 20 |     pub fn nth(&self, index: u64) -> Option<Branch<'_, Self, A>> {
[INFO] [stdout]    |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/index.rs:25:20
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn nth_mut(&mut self, index: u64) -> Option<BranchMut<Self, A>> {
[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] 25 |     pub fn nth_mut(&mut self, index: u64) -> Option<BranchMut<'_, Self, A>> {
[INFO] [stdout]    |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/keyed.rs:21:23
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn max_key<K>(&self) -> Option<Branch<Self, A>>
[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] 21 |     pub fn max_key<K>(&self) -> Option<Branch<'_, Self, A>>
[INFO] [stdout]    |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/keyed.rs:31:27
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn max_key_mut<K>(&mut self) -> Option<BranchMut<Self, A>>
[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] 31 |     pub fn max_key_mut<K>(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stdout]    |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "777bbd625456643f392ed7ca121988597ed1def5fd62bcd92be10a9e509f1935", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "777bbd625456643f392ed7ca121988597ed1def5fd62bcd92be10a9e509f1935", kill_on_drop: false }`
[INFO] [stdout] 777bbd625456643f392ed7ca121988597ed1def5fd62bcd92be10a9e509f1935
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 216371d98b317ea4c83e9e52f60e029f19a87ef6000376658f3cccb8fcd718af
[INFO] running `Command { std: "docker" "start" "-a" "216371d98b317ea4c83e9e52f60e029f19a87ef6000376658f3cccb8fcd718af", kill_on_drop: false }`
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:53:14
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn child(&self, index: usize) -> Child<Self, A> {
[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] 53 |     fn child(&self, index: usize) -> Child<'_, Self, A> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:67:18
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn child_mut(&mut self, index: usize) -> ChildMut<Self, A> {
[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] 67 |     fn child_mut(&mut self, index: usize) -> ChildMut<'_, Self, A> {
[INFO] [stdout]    |                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/index.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn nth(&self, index: u64) -> Option<Branch<Self, A>> {
[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] 20 |     pub fn nth(&self, index: u64) -> Option<Branch<'_, Self, A>> {
[INFO] [stdout]    |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/index.rs:25:20
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn nth_mut(&mut self, index: u64) -> Option<BranchMut<Self, A>> {
[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] 25 |     pub fn nth_mut(&mut self, index: u64) -> Option<BranchMut<'_, Self, A>> {
[INFO] [stdout]    |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/keyed.rs:21:23
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn max_key<K>(&self) -> Option<Branch<Self, A>>
[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] 21 |     pub fn max_key<K>(&self) -> Option<Branch<'_, Self, A>>
[INFO] [stdout]    |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/keyed.rs:31:27
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn max_key_mut<K>(&mut self) -> Option<BranchMut<Self, A>>
[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] 31 |     pub fn max_key_mut<K>(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stdout]    |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling nstack v0.16.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:53:14
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn child(&self, index: usize) -> Child<Self, A> {
[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] 53 |     fn child(&self, index: usize) -> Child<'_, Self, A> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:67:18
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn child_mut(&mut self, index: usize) -> ChildMut<Self, A> {
[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] 67 |     fn child_mut(&mut self, index: usize) -> ChildMut<'_, Self, A> {
[INFO] [stdout]    |                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/index.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn nth(&self, index: u64) -> Option<Branch<Self, A>> {
[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] 20 |     pub fn nth(&self, index: u64) -> Option<Branch<'_, Self, A>> {
[INFO] [stdout]    |                                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/index.rs:25:20
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn nth_mut(&mut self, index: u64) -> Option<BranchMut<Self, A>> {
[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] 25 |     pub fn nth_mut(&mut self, index: u64) -> Option<BranchMut<'_, Self, A>> {
[INFO] [stdout]    |                                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/keyed.rs:21:23
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn max_key<K>(&self) -> Option<Branch<Self, A>>
[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] 21 |     pub fn max_key<K>(&self) -> Option<Branch<'_, Self, A>>
[INFO] [stdout]    |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/annotation/keyed.rs:31:27
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn max_key_mut<K>(&mut self) -> Option<BranchMut<Self, A>>
[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] 31 |     pub fn max_key_mut<K>(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stdout]    |                                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "216371d98b317ea4c83e9e52f60e029f19a87ef6000376658f3cccb8fcd718af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "216371d98b317ea4c83e9e52f60e029f19a87ef6000376658f3cccb8fcd718af", kill_on_drop: false }`
[INFO] [stdout] 216371d98b317ea4c83e9e52f60e029f19a87ef6000376658f3cccb8fcd718af
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c70c823681911092fd8bc1d193da67a90470b217ad97a51057a4b2849cbb3451
[INFO] running `Command { std: "docker" "start" "-a" "c70c823681911092fd8bc1d193da67a90470b217ad97a51057a4b2849cbb3451", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/lib.rs:53:14
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn child(&self, index: usize) -> Child<Self, A> {
[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] 53 |     fn child(&self, index: usize) -> Child<'_, Self, A> {
[INFO] [stderr]    |                                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/lib.rs:67:18
[INFO] [stderr]    |
[INFO] [stderr] 67 |     fn child_mut(&mut self, index: usize) -> ChildMut<Self, A> {
[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] 67 |     fn child_mut(&mut self, index: usize) -> ChildMut<'_, Self, A> {
[INFO] [stderr]    |                                                       +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/annotation/index.rs:20:16
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn nth(&self, index: u64) -> Option<Branch<Self, A>> {
[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] 20 |     pub fn nth(&self, index: u64) -> Option<Branch<'_, Self, A>> {
[INFO] [stderr]    |                                                    +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/annotation/index.rs:25:20
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn nth_mut(&mut self, index: u64) -> Option<BranchMut<Self, A>> {
[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] 25 |     pub fn nth_mut(&mut self, index: u64) -> Option<BranchMut<'_, Self, A>> {
[INFO] [stderr]    |                                                               +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/annotation/keyed.rs:21:23
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn max_key<K>(&self) -> Option<Branch<Self, A>>
[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] 21 |     pub fn max_key<K>(&self) -> Option<Branch<'_, Self, A>>
[INFO] [stderr]    |                                               +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/annotation/keyed.rs:31:27
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn max_key_mut<K>(&mut self) -> Option<BranchMut<Self, A>>
[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] 31 |     pub fn max_key_mut<K>(&mut self) -> Option<BranchMut<'_, Self, A>>
[INFO] [stderr]    |                                                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: `nstack` (lib) generated 6 warnings (run `cargo fix --lib -p nstack` to apply 6 suggestions)
[INFO] [stderr] warning: `nstack` (lib test) generated 6 warnings (6 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/nstack-e5483e109c00d4e4)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/nstack.rs (/opt/rustwide/target/debug/deps/nstack-c8290ff4175fd2c4)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test double ... ok
[INFO] [stdout] test push_pop ... ok
[INFO] [stdout] test branch_lengths ... ok
[INFO] [stdout] test multiple ... ok
[INFO] [stdout] test trivial ... ok
[INFO] [stdout] test nth ... ok
[INFO] [stdout] test nth_mut ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests nstack
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c70c823681911092fd8bc1d193da67a90470b217ad97a51057a4b2849cbb3451", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c70c823681911092fd8bc1d193da67a90470b217ad97a51057a4b2849cbb3451", kill_on_drop: false }`
[INFO] [stdout] c70c823681911092fd8bc1d193da67a90470b217ad97a51057a4b2849cbb3451
