[INFO] cloning repository https://github.com/alex-karo/rust-test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alex-karo/rust-test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falex-karo%2Frust-test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falex-karo%2Frust-test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 709e5574836ec13f469365d8c66dea2336c80732
[INFO] checking alex-karo/rust-test against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falex-karo%2Frust-test" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alex-karo/rust-test on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alex-karo/rust-test
[INFO] finished tweaking git repo https://github.com/alex-karo/rust-test
[INFO] tweaked toml for git repo https://github.com/alex-karo/rust-test written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/alex-karo/rust-test 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" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51a79a22ec01ef0b7d2bb51b8df566dc2f553da1cffb2c93a658d4095ec73107
[INFO] running `Command { std: "docker" "start" "-a" "51a79a22ec01ef0b7d2bb51b8df566dc2f553da1cffb2c93a658d4095ec73107", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51a79a22ec01ef0b7d2bb51b8df566dc2f553da1cffb2c93a658d4095ec73107", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51a79a22ec01ef0b7d2bb51b8df566dc2f553da1cffb2c93a658d4095ec73107", kill_on_drop: false }`
[INFO] [stdout] 51a79a22ec01ef0b7d2bb51b8df566dc2f553da1cffb2c93a658d4095ec73107
[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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ed3e05dbaced3f3780566e0b2e63bf4b0ff44f54870794530ac6657bb5c6080
[INFO] running `Command { std: "docker" "start" "-a" "9ed3e05dbaced3f3780566e0b2e63bf4b0ff44f54870794530ac6657bb5c6080", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 |               Some(node) => {
[INFO] [stdout]    |  ___________________________^
[INFO] [stdout] 71 | |
[INFO] [stdout] 72 | |             },
[INFO] [stdout]    | |_____________^ expected `Option<T>`, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Option<T>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:74:29
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 self.curr = &self.head;
[INFO] [stdout]    |                 ---------   ^^^^^^^^^^ expected `Option<Box<Node<T>>>`, found `&Option<Box<Node<T>>>`
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 expected due to the type of this binding
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Option<Box<Node<T>>>`
[INFO] [stdout]            found reference `&Option<Box<Node<T>>>`
[INFO] [stdout] help: consider removing the borrow
[INFO] [stdout]    |
[INFO] [stdout] 74 -                 self.curr = &self.head;
[INFO] [stdout] 74 +                 self.curr = self.head;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |               None => {
[INFO] [stdout]    |  _____________________^
[INFO] [stdout] 74 | |                 self.curr = &self.head;
[INFO] [stdout] 75 | |             }
[INFO] [stdout]    | |_____________^ expected `Option<T>`, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Option<T>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-test` (bin "rust-test" test) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 |               Some(node) => {
[INFO] [stdout]    |  ___________________________^
[INFO] [stdout] 71 | |
[INFO] [stdout] 72 | |             },
[INFO] [stdout]    | |_____________^ expected `Option<T>`, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Option<T>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:74:29
[INFO] [stdout]    |
[INFO] [stdout] 74 |                 self.curr = &self.head;
[INFO] [stdout]    |                 ---------   ^^^^^^^^^^ expected `Option<Box<Node<T>>>`, found `&Option<Box<Node<T>>>`
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 expected due to the type of this binding
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Option<Box<Node<T>>>`
[INFO] [stdout]            found reference `&Option<Box<Node<T>>>`
[INFO] [stdout] help: consider removing the borrow
[INFO] [stdout]    |
[INFO] [stdout] 74 -                 self.curr = &self.head;
[INFO] [stdout] 74 +                 self.curr = self.head;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |               None => {
[INFO] [stdout]    |  _____________________^
[INFO] [stdout] 74 | |                 self.curr = &self.head;
[INFO] [stdout] 75 | |             }
[INFO] [stdout]    | |_____________^ expected `Option<T>`, found `()`
[INFO] [stdout]    |
[INFO] [stdout]    = note:   expected enum `Option<T>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-test` (bin "rust-test") due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "9ed3e05dbaced3f3780566e0b2e63bf4b0ff44f54870794530ac6657bb5c6080", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ed3e05dbaced3f3780566e0b2e63bf4b0ff44f54870794530ac6657bb5c6080", kill_on_drop: false }`
[INFO] [stdout] 9ed3e05dbaced3f3780566e0b2e63bf4b0ff44f54870794530ac6657bb5c6080
