[INFO] cloning repository https://github.com/guiyuanju/linked_list_in_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/guiyuanju/linked_list_in_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguiyuanju%2Flinked_list_in_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguiyuanju%2Flinked_list_in_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f1c9c76062e9abce7070bee19a3c889bb740d9bc
[INFO] checking guiyuanju/linked_list_in_rust against try#8d46be77cd48fdbcced888d027457e2c9cf2aa16 for pr-142723
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguiyuanju%2Flinked_list_in_rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/guiyuanju/linked_list_in_rust on toolchain 8d46be77cd48fdbcced888d027457e2c9cf2aa16
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/guiyuanju/linked_list_in_rust
[INFO] finished tweaking git repo https://github.com/guiyuanju/linked_list_in_rust
[INFO] tweaked toml for git repo https://github.com/guiyuanju/linked_list_in_rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/guiyuanju/linked_list_in_rust 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" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c96b009872160d5d54678f331f763c56ed97b78af81d86bf107cbd13067353a1
[INFO] running `Command { std: "docker" "start" "-a" "c96b009872160d5d54678f331f763c56ed97b78af81d86bf107cbd13067353a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c96b009872160d5d54678f331f763c56ed97b78af81d86bf107cbd13067353a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c96b009872160d5d54678f331f763c56ed97b78af81d86bf107cbd13067353a1", kill_on_drop: false }`
[INFO] [stdout] c96b009872160d5d54678f331f763c56ed97b78af81d86bf107cbd13067353a1
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8d46be77cd48fdbcced888d027457e2c9cf2aa16" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6a218cf033feb8d3650ffb0a93abb2bd13c3d9fd3b6361f2cff6acdae146e7d
[INFO] running `Command { std: "docker" "start" "-a" "e6a218cf033feb8d3650ffb0a93abb2bd13c3d9fd3b6361f2cff6acdae146e7d", kill_on_drop: false }`
[INFO] [stderr]     Checking linked_list_in_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0072]: recursive type `List` has infinite size
[INFO] [stdout]  --> src/first.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum List {
[INFO] [stdout]   | ^^^^^^^^^^^^^
[INFO] [stdout] 2 |     Empty,
[INFO] [stdout] 3 |     Elem(i32, List),
[INFO] [stdout]   |               ---- recursive without indirection
[INFO] [stdout]   |
[INFO] [stdout] help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to break the cycle
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Elem(i32, Box<List>),
[INFO] [stdout]   |               ++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0072]: recursive type `List` has infinite size
[INFO] [stdout]  --> src/first.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum List {
[INFO] [stdout]   | ^^^^^^^^^^^^^
[INFO] [stdout] 2 |     Empty,
[INFO] [stdout] 3 |     Elem(i32, List),
[INFO] [stdout]   |               ---- recursive without indirection
[INFO] [stdout]   |
[INFO] [stdout] help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to break the cycle
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Elem(i32, Box<List>),
[INFO] [stdout]   |               ++++    +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0072`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0072`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `linked_list_in_rust` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `linked_list_in_rust` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "e6a218cf033feb8d3650ffb0a93abb2bd13c3d9fd3b6361f2cff6acdae146e7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6a218cf033feb8d3650ffb0a93abb2bd13c3d9fd3b6361f2cff6acdae146e7d", kill_on_drop: false }`
[INFO] [stdout] e6a218cf033feb8d3650ffb0a93abb2bd13c3d9fd3b6361f2cff6acdae146e7d