[INFO] cloning repository https://github.com/fontlos/rustlings-algorithm-2025S
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fontlos/rustlings-algorithm-2025S" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffontlos%2Frustlings-algorithm-2025S", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffontlos%2Frustlings-algorithm-2025S'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fdf72117c628c2a798141e6c3c592a147d7dc4e9
[INFO] checking fontlos/rustlings-algorithm-2025S against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffontlos%2Frustlings-algorithm-2025S" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fontlos/rustlings-algorithm-2025S
[INFO] finished tweaking git repo https://github.com/fontlos/rustlings-algorithm-2025S
[INFO] tweaked toml for git repo https://github.com/fontlos/rustlings-algorithm-2025S written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fontlos/rustlings-algorithm-2025S on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fontlos/rustlings-algorithm-2025S 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd4c0681186b92681df572e88a3c03ec212164cedbf8e69bb56dc36434c9f791
[INFO] running `Command { std: "docker" "start" "-a" "bd4c0681186b92681df572e88a3c03ec212164cedbf8e69bb56dc36434c9f791", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd4c0681186b92681df572e88a3c03ec212164cedbf8e69bb56dc36434c9f791", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd4c0681186b92681df572e88a3c03ec212164cedbf8e69bb56dc36434c9f791", kill_on_drop: false }`
[INFO] [stdout] bd4c0681186b92681df572e88a3c03ec212164cedbf8e69bb56dc36434c9f791
[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=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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5df6594246a0b40299f49b63b1d6e3d102b9c74207ce24ea1930df52fcdc5f8c
[INFO] running `Command { std: "docker" "start" "-a" "5df6594246a0b40299f49b63b1d6e3d102b9c74207ce24ea1930df52fcdc5f8c", kill_on_drop: false }`
[INFO] [stderr]     Checking learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> tests/_07stack.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn iter(&self) -> Iter<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] 63 |     fn iter(&self) -> Iter<'_, T> {
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> tests/_07stack.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |     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] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `LinkedListIter` is never constructed
[INFO] [stdout]    --> tests/_01single_linked_list_merge_iter.rs:144:12
[INFO] [stdout]     |
[INFO] [stdout] 144 | pub struct LinkedListIter<'a, T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]     = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `LinkedListIterMut` is never constructed
[INFO] [stdout]    --> tests/_01single_linked_list_merge_iter.rs:180:12
[INFO] [stdout]     |
[INFO] [stdout] 180 | pub struct LinkedListIterMut<'a, T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn` (test "_01single_linked_list_merge_iter") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5df6594246a0b40299f49b63b1d6e3d102b9c74207ce24ea1930df52fcdc5f8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5df6594246a0b40299f49b63b1d6e3d102b9c74207ce24ea1930df52fcdc5f8c", kill_on_drop: false }`
[INFO] [stdout] 5df6594246a0b40299f49b63b1d6e3d102b9c74207ce24ea1930df52fcdc5f8c
