[INFO] cloning repository https://github.com/erwin-lang/erwin-core
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/erwin-lang/erwin-core" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferwin-lang%2Ferwin-core", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferwin-lang%2Ferwin-core'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1f97daab41d0b534dd020b65ba892adaabdd1309
[INFO] checking erwin-lang/erwin-core against try#5f6abd89da253a562ad85d235b9342a3ac336c28 for pr-156114-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferwin-lang%2Ferwin-core" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/erwin-lang/erwin-core
[INFO] finished tweaking git repo https://github.com/erwin-lang/erwin-core
[INFO] tweaked toml for git repo https://github.com/erwin-lang/erwin-core written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/erwin-lang/erwin-core on toolchain 5f6abd89da253a562ad85d235b9342a3ac336c28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5f6abd89da253a562ad85d235b9342a3ac336c28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/erwin-lang/erwin-core 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" "+5f6abd89da253a562ad85d235b9342a3ac336c28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+5f6abd89da253a562ad85d235b9342a3ac336c28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 13c9c4d332d40628b85dacb9c5b96982bf86113ce0df5580f9e76c25bc45045c
[INFO] running `Command { std: "docker" "start" "-a" "13c9c4d332d40628b85dacb9c5b96982bf86113ce0df5580f9e76c25bc45045c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13c9c4d332d40628b85dacb9c5b96982bf86113ce0df5580f9e76c25bc45045c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13c9c4d332d40628b85dacb9c5b96982bf86113ce0df5580f9e76c25bc45045c", kill_on_drop: false }`
[INFO] [stdout] 13c9c4d332d40628b85dacb9c5b96982bf86113ce0df5580f9e76c25bc45045c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+5f6abd89da253a562ad85d235b9342a3ac336c28" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] decc3d0e7fbbc0f8b130b99a330acb02bf661c6efbbd677dc29ba3ce432d5efb
[INFO] running `Command { std: "docker" "start" "-a" "decc3d0e7fbbc0f8b130b99a330acb02bf661c6efbbd677dc29ba3ce432d5efb", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking ordered-float v5.3.0
[INFO] [stderr]     Checking erw v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `prelude_module`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let prelude_module = std_path.join("prelude.erw").canonicalize()?;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prelude_module`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `main_module`
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let main_module = Path::new(&args[1]).canonicalize()?;
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_main_module`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arena`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let arena = Box::leak(Box::new(Arena::new()));
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_arena`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prelude_module`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let prelude_module = std_path.join("prelude.erw").canonicalize()?;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prelude_module`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `main_module`
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let main_module = Path::new(&args[1]).canonicalize()?;
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_main_module`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arena`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let arena = Box::leak(Box::new(Arena::new()));
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_arena`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Erased` is more private than the item `Arena::storage`
[INFO] [stdout]   --> src/arena.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout]  4 |     pub(crate) storage: RefCell<Vec<Box<dyn Erased + 'a>>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `Arena::storage` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `Erased` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/arena.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | trait Erased {}
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `storage` is never read
[INFO] [stdout]  --> src/arena.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) struct Arena<'a> {
[INFO] [stdout]   |                   ----- field in this struct
[INFO] [stdout] 4 |     pub(crate) storage: RefCell<Vec<Box<dyn Erased + 'a>>>,
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `alloc` is never used
[INFO] [stdout]   --> src/arena.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl<'a> Arena<'a> {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub(crate) fn alloc<T: 'a>(&self, val: T) -> &'a T {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loc_error` is never used
[INFO] [stdout]   --> src/error.rs:36:15
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub(crate) fn loc_error<T>(line: usize, col: usize, msg: &str) -> Result<T, Error> {
[INFO] [stdout]    |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Erased` is more private than the item `Arena::storage`
[INFO] [stdout]   --> src/arena.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout]  4 |     pub(crate) storage: RefCell<Vec<Box<dyn Erased + 'a>>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `Arena::storage` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `Erased` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/arena.rs:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | trait Erased {}
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `storage` is never read
[INFO] [stdout]  --> src/arena.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) struct Arena<'a> {
[INFO] [stdout]   |                   ----- field in this struct
[INFO] [stdout] 4 |     pub(crate) storage: RefCell<Vec<Box<dyn Erased + 'a>>>,
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.17s
[INFO] [stdout] warning: method `alloc` is never used
[INFO] [stdout]   --> src/arena.rs:16:19
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl<'a> Arena<'a> {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub(crate) fn alloc<T: 'a>(&self, val: T) -> &'a T {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loc_error` is never used
[INFO] [stdout]   --> src/error.rs:36:15
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub(crate) fn loc_error<T>(line: usize, col: usize, msg: &str) -> Result<T, Error> {
[INFO] [stdout]    |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "decc3d0e7fbbc0f8b130b99a330acb02bf661c6efbbd677dc29ba3ce432d5efb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "decc3d0e7fbbc0f8b130b99a330acb02bf661c6efbbd677dc29ba3ce432d5efb", kill_on_drop: false }`
[INFO] [stdout] decc3d0e7fbbc0f8b130b99a330acb02bf661c6efbbd677dc29ba3ce432d5efb