[INFO] cloning repository https://github.com/Niskarsh/top-products
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Niskarsh/top-products" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNiskarsh%2Ftop-products", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNiskarsh%2Ftop-products'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0de3dbd6df0de35ca27e99325a78f295da109a8f
[INFO] checking Niskarsh/top-products against try#5785402183672f7786e9dc343d7b435bdaf4a4bc for pr-138001
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNiskarsh%2Ftop-products" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Niskarsh/top-products on toolchain 5785402183672f7786e9dc343d7b435bdaf4a4bc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5785402183672f7786e9dc343d7b435bdaf4a4bc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Niskarsh/top-products
[INFO] finished tweaking git repo https://github.com/Niskarsh/top-products
[INFO] tweaked toml for git repo https://github.com/Niskarsh/top-products written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Niskarsh/top-products 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" "+5785402183672f7786e9dc343d7b435bdaf4a4bc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+5785402183672f7786e9dc343d7b435bdaf4a4bc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9cac22a5476aa7f4d959de6b3edecd54fafc4edb91f638e55ea29d2528cb27af
[INFO] running `Command { std: "docker" "start" "-a" "9cac22a5476aa7f4d959de6b3edecd54fafc4edb91f638e55ea29d2528cb27af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cac22a5476aa7f4d959de6b3edecd54fafc4edb91f638e55ea29d2528cb27af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cac22a5476aa7f4d959de6b3edecd54fafc4edb91f638e55ea29d2528cb27af", kill_on_drop: false }`
[INFO] [stdout] 9cac22a5476aa7f4d959de6b3edecd54fafc4edb91f638e55ea29d2528cb27af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+5785402183672f7786e9dc343d7b435bdaf4a4bc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a4bd082b24b684cd857c2ccaf9021a45dc89435c3d7fa23afc7eb3abe46c10d
[INFO] running `Command { std: "docker" "start" "-a" "4a4bd082b24b684cd857c2ccaf9021a45dc89435c3d7fa23afc7eb3abe46c10d", kill_on_drop: false }`
[INFO] [stderr]     Checking top-products v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:36:68
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn merge(&self, ll2: &LinkedList, llFinal: &LinkedList) -> &LinkedList {
[INFO] [stdout]    |            -----                                                   ^^^^^^^^^^^ expected `&LinkedList`, found `()`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout] help: consider returning the local binding `self`
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn merge(&self, ll2: &LinkedList, llFinal: &LinkedList) -> &LinkedList {
[INFO] [stdout] 38 ~         self
[INFO] [stdout] 39 ~     // Should have coded like ll {ll {ll}}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/lib.rs:36:68
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn merge(&self, ll2: &LinkedList, llFinal: &LinkedList) -> &LinkedList {
[INFO] [stdout]    |            -----                                                   ^^^^^^^^^^^ expected `&LinkedList`, found `()`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout] help: consider returning the local binding `self`
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn merge(&self, ll2: &LinkedList, llFinal: &LinkedList) -> &LinkedList {
[INFO] [stdout] 38 ~         self
[INFO] [stdout] 39 ~     // Should have coded like ll {ll {ll}}
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `top-products` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `top-products` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "4a4bd082b24b684cd857c2ccaf9021a45dc89435c3d7fa23afc7eb3abe46c10d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a4bd082b24b684cd857c2ccaf9021a45dc89435c3d7fa23afc7eb3abe46c10d", kill_on_drop: false }`
[INFO] [stdout] 4a4bd082b24b684cd857c2ccaf9021a45dc89435c3d7fa23afc7eb3abe46c10d