[INFO] cloning repository https://github.com/MammosGeorgios/rust-algorithms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MammosGeorgios/rust-algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMammosGeorgios%2Frust-algorithms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMammosGeorgios%2Frust-algorithms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c4712f6211070b7f7e0f0d0dae94b845710064ed
[INFO] fixing MammosGeorgios/rust-algorithms against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMammosGeorgios%2Frust-algorithms" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/MammosGeorgios/rust-algorithms
[INFO] finished tweaking git repo https://github.com/MammosGeorgios/rust-algorithms
[INFO] tweaked toml for git repo https://github.com/MammosGeorgios/rust-algorithms written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/MammosGeorgios/rust-algorithms on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/MammosGeorgios/rust-algorithms 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" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_core v0.10.0-rc-2
[INFO] [stderr]   Downloaded chacha20 v0.10.0-rc.5
[INFO] [stderr]   Downloaded rand v0.10.0-rc.5
[INFO] [stderr]   Downloaded prop-test v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 55cb901a5d561f3db2de40808ef445109cf85453b184b352a136ff0badadecbd
[INFO] running `Command { std: "docker" "start" "55cb901a5d561f3db2de40808ef445109cf85453b184b352a136ff0badadecbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "55cb901a5d561f3db2de40808ef445109cf85453b184b352a136ff0badadecbd" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55cb901a5d561f3db2de40808ef445109cf85453b184b352a136ff0badadecbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "55cb901a5d561f3db2de40808ef445109cf85453b184b352a136ff0badadecbd" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling winnow v0.7.13
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling hashbrown v0.16.0
[INFO] [stderr]     Checking rustix v1.1.2
[INFO] [stderr]    Compiling regex-syntax v0.8.8
[INFO] [stderr]     Checking once_cell v1.21.3
[INFO] [stderr]    Compiling toml_datetime v0.7.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling indexmap v2.12.0
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling rstest_macros v0.26.1
[INFO] [stderr]    Compiling syn v2.0.109
[INFO] [stderr]     Checking getrandom v0.3.4
[INFO] [stderr]     Checking wait-timeout v0.2.1
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking rand_core v0.10.0-rc-2
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking chacha20 v0.10.0-rc.5
[INFO] [stderr]     Checking unarray v0.1.4
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking tempfile v3.23.0
[INFO] [stderr]     Checking rand_xorshift v0.4.0
[INFO] [stderr]     Checking rand v0.10.0-rc.5
[INFO] [stderr]     Checking rusty-fork v0.3.1
[INFO] [stderr]    Compiling toml_parser v1.0.4
[INFO] [stderr]    Compiling regex-automata v0.4.13
[INFO] [stderr]    Compiling toml_edit v0.23.7
[INFO] [stderr]     Checking rust-algos v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/data_structure/queue.rs:34:31
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn enqueue(&mut self, item: i32) {}
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0507]: cannot move out of `self.head` which is behind a mutable reference
[INFO] [stdout]   --> src/data_structure/queue.rs:57:28
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let current_head = self.head.unwrap();
[INFO] [stdout]    |                            ^^^^^^^^^ -------- `self.head` moved due to this method call
[INFO] [stdout]    |                            |
[INFO] [stdout]    |                            move occurs because `self.head` has type `Option<Box<QNode>>`, which does not implement the `Copy` trait
[INFO] [stdout]    |
[INFO] [stdout] note: `Option::<T>::unwrap` takes ownership of the receiver `self`, which moves `self.head`
[INFO] [stdout]   --> /rustc/622891a4e29178280638a6b63a8908bde2c0c854/library/core/src/option.rs:1010:24
[INFO] [stdout] help: consider calling `.as_ref()` to borrow the value's contents
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let current_head = self.head.as_ref().unwrap();
[INFO] [stdout]    |                                     +++++++++
[INFO] [stdout] help: consider calling `.as_mut()` to mutably borrow the value's contents
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let current_head = self.head.as_mut().unwrap();
[INFO] [stdout]    |                                     +++++++++
[INFO] [stdout] help: consider cloning the value if the performance cost is acceptable
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let current_head = self.head.clone().unwrap();
[INFO] [stdout]    |                                     ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0507`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-algos` (bin "rust-algos") due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "55cb901a5d561f3db2de40808ef445109cf85453b184b352a136ff0badadecbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55cb901a5d561f3db2de40808ef445109cf85453b184b352a136ff0badadecbd", kill_on_drop: false }`
[INFO] [stdout] 55cb901a5d561f3db2de40808ef445109cf85453b184b352a136ff0badadecbd
