[INFO] cloning repository https://github.com/tamaroning/mini-rustc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tamaroning/mini-rustc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftamaroning%2Fmini-rustc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftamaroning%2Fmini-rustc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a97bcef5befa1746ed1cc405be69a3f4d8a14c6c
[INFO] checking tamaroning/mini-rustc against try#8d46be77cd48fdbcced888d027457e2c9cf2aa16 for pr-142723
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftamaroning%2Fmini-rustc" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tamaroning/mini-rustc 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] removed /workspace/builds/worker-2-tc2/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/tamaroning/mini-rustc
[INFO] finished tweaking git repo https://github.com/tamaroning/mini-rustc
[INFO] tweaked toml for git repo https://github.com/tamaroning/mini-rustc written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/tamaroning/mini-rustc 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] [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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 3a58db441bdcef25f5126b257227b08ee362a4af4749d371dea7c7389c195668
[INFO] running `Command { std: "docker" "start" "-a" "3a58db441bdcef25f5126b257227b08ee362a4af4749d371dea7c7389c195668", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a58db441bdcef25f5126b257227b08ee362a4af4749d371dea7c7389c195668", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a58db441bdcef25f5126b257227b08ee362a4af4749d371dea7c7389c195668", kill_on_drop: false }`
[INFO] [stdout] 3a58db441bdcef25f5126b257227b08ee362a4af4749d371dea7c7389c195668
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 820bbab789a40c25ae8d365c383e1c1e4c5f71dcb4932346a5f8c7f9f3c6e9ec
[INFO] running `Command { std: "docker" "start" "-a" "820bbab789a40c25ae8d365c383e1c1e4c5f71dcb4932346a5f8c7f9f3c6e9ec", kill_on_drop: false }`
[INFO] [stderr]     Checking mini-rustc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: `main` has invalid return type `i32`
[INFO] [stdout]   --> examples/fibonacci.rs:12:14
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn main() -> i32 {
[INFO] [stdout]    |              ^^^ `main` can only return types that implement `Termination`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `()`, or a `Result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `main` has invalid return type `i32`
[INFO] [stdout]   --> examples/struct.rs:13:14
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn main() -> i32 {
[INFO] [stdout]    |              ^^^ `main` can only return types that implement `Termination`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `()`, or a `Result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mini-rustc` (example "struct") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `mini-rustc` (example "fibonacci") due to 1 previous error
[INFO] [stdout] error[E0603]: struct `Inner` is private
[INFO] [stdout]  --> examples/module.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 |     inner: a::Inner,
[INFO] [stdout]   |               ^^^^^ private struct
[INFO] [stdout]   |
[INFO] [stdout] note: the struct `Inner` is defined here
[INFO] [stdout]  --> examples/module.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     struct Inner {
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: struct `Inner` is private
[INFO] [stdout]   --> examples/module.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 |         inner: a::Inner { x: 0 },
[INFO] [stdout]    |                   ^^^^^ private struct
[INFO] [stdout]    |
[INFO] [stdout] note: the struct `Inner` is defined here
[INFO] [stdout]   --> examples/module.rs:2:5
[INFO] [stdout]    |
[INFO] [stdout] 2  |     struct Inner {
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `main` has invalid return type `i32`
[INFO] [stdout]   --> examples/module.rs:11:14
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn main() -> i32 {
[INFO] [stdout]    |              ^^^ `main` can only return types that implement `Termination`
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `()`, or a `Result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0616]: field `x` of struct `Inner` is private
[INFO] [stdout]   --> examples/module.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     l.inner.x
[INFO] [stdout]    |             ^ private field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0603, E0616.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mini-rustc` (example "module") due to 4 previous errors
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/ast/mod.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Crate {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 24 |     pub items: Vec<Item>,
[INFO] [stdout] 25 |     pub id: NodeId,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Crate` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/ast/mod.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct Module {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 45 |     pub id: NodeId,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Module` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/ast/mod.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub struct StructItem {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub id: NodeId,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StructItem` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `ext` and `id` are never read
[INFO] [stdout]   --> src/ast/mod.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub struct Func {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub ext: Option<String>,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 67 |     pub body: Option<Block>,
[INFO] [stdout] 68 |     pub id: NodeId,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Func` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/ast/mod.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Crate {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 24 |     pub items: Vec<Item>,
[INFO] [stdout] 25 |     pub id: NodeId,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Crate` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/ast/mod.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct Module {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 45 |     pub id: NodeId,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Module` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/ast/mod.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub struct StructItem {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub id: NodeId,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StructItem` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `ext` and `id` are never read
[INFO] [stdout]   --> src/ast/mod.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub struct Func {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub ext: Option<String>,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 67 |     pub body: Option<Block>,
[INFO] [stdout] 68 |     pub id: NodeId,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Func` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "820bbab789a40c25ae8d365c383e1c1e4c5f71dcb4932346a5f8c7f9f3c6e9ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "820bbab789a40c25ae8d365c383e1c1e4c5f71dcb4932346a5f8c7f9f3c6e9ec", kill_on_drop: false }`
[INFO] [stdout] 820bbab789a40c25ae8d365c383e1c1e4c5f71dcb4932346a5f8c7f9f3c6e9ec