[INFO] cloning repository https://github.com/kylegibson15/rust-leetcode [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kylegibson15/rust-leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkylegibson15%2Frust-leetcode", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkylegibson15%2Frust-leetcode'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 7e7d74ceedf0d7467020f4e7cfb564f4da1a1999 [INFO] testing kylegibson15/rust-leetcode against 1.60.0 for beta-1.61-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkylegibson15%2Frust-leetcode" "/workspace/builds/worker-10/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/kylegibson15/rust-leetcode on toolchain 1.60.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/kylegibson15/rust-leetcode [INFO] finished tweaking git repo https://github.com/kylegibson15/rust-leetcode [INFO] tweaked toml for git repo https://github.com/kylegibson15/rust-leetcode written to /workspace/builds/worker-10/source/Cargo.toml [INFO] crate git repo https://github.com/kylegibson15/rust-leetcode already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 9070011676c0ed50e5d0b5cf1b42d0aa5b32eac51841f497fca1f0dde5db6ef3 [INFO] running `Command { std: "docker" "start" "-a" "9070011676c0ed50e5d0b5cf1b42d0aa5b32eac51841f497fca1f0dde5db6ef3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "9070011676c0ed50e5d0b5cf1b42d0aa5b32eac51841f497fca1f0dde5db6ef3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9070011676c0ed50e5d0b5cf1b42d0aa5b32eac51841f497fca1f0dde5db6ef3", kill_on_drop: false }` [INFO] [stdout] 9070011676c0ed50e5d0b5cf1b42d0aa5b32eac51841f497fca1f0dde5db6ef3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 77602e356537c8d2c003c7c1568fb530293209341c9ed5a4e8f289de4f448b2c [INFO] running `Command { std: "docker" "start" "-a" "77602e356537c8d2c003c7c1568fb530293209341c9ed5a4e8f289de4f448b2c", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.109 [INFO] [stderr] Compiling ppv-lite86 v0.2.15 [INFO] [stderr] Compiling getrandom v0.2.3 [INFO] [stderr] Compiling rand_core v0.6.3 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling rand v0.8.4 [INFO] [stderr] Compiling cookbook v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/middle_of_linked_list.rs:15:48 [INFO] [stdout] | [INFO] [stdout] 15 | fn middle_node(head: Option>) -> Option> { [INFO] [stdout] | ----------- ^^^^^^^^^^^^^^^^^^^^^ expected enum `Option`, found `()` [INFO] [stdout] | | [INFO] [stdout] | implicitly returns `()` as its body has no tail or `return` expression [INFO] [stdout] | [INFO] [stdout] = note: expected enum `Option>` [INFO] [stdout] found unit type `()` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/middle_of_linked_list.rs:24:15 [INFO] [stdout] | [INFO] [stdout] 21 | let mut current: &Option> = list; [INFO] [stdout] | ---------------------- expected due to this type [INFO] [stdout] ... [INFO] [stdout] 24 | current = current.unwrap() [INFO] [stdout] | ^^^^^^^^^^^^^^^^ expected reference, found struct `Box` [INFO] [stdout] | [INFO] [stdout] = note: expected reference `&Option>` [INFO] [stdout] found struct `Box` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/middle_of_linked_list.rs:26:3 [INFO] [stdout] | [INFO] [stdout] 22 | / loop { [INFO] [stdout] 23 | | println!("{:?}", current); [INFO] [stdout] 24 | | current = current.unwrap() [INFO] [stdout] 25 | | } [INFO] [stdout] | |___- any code following this expression is unreachable [INFO] [stdout] 26 | length [INFO] [stdout] | ^^^^^^ unreachable expression [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stderr] error: could not compile `cookbook` due to 3 previous errors; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "77602e356537c8d2c003c7c1568fb530293209341c9ed5a4e8f289de4f448b2c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "77602e356537c8d2c003c7c1568fb530293209341c9ed5a4e8f289de4f448b2c", kill_on_drop: false }` [INFO] [stdout] 77602e356537c8d2c003c7c1568fb530293209341c9ed5a4e8f289de4f448b2c