[INFO] cloning repository https://github.com/fmonniot/zelkova-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fmonniot/zelkova-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffmonniot%2Fzelkova-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffmonniot%2Fzelkova-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90a88eeb1ac4f47cd784649d1a35a0cf0c2fbb7a
[INFO] checking fmonniot/zelkova-lang against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffmonniot%2Fzelkova-lang" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fmonniot/zelkova-lang on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fmonniot/zelkova-lang
[INFO] finished tweaking git repo https://github.com/fmonniot/zelkova-lang
[INFO] tweaked toml for git repo https://github.com/fmonniot/zelkova-lang written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fmonniot/zelkova-lang 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded string_cache v0.8.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]    Compiling memchr v2.6.4
[INFO] [stderr]    Compiling serde v1.0.115
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[INFO] [stderr]    Compiling zelkova-lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Name` is imported redundantly
[INFO] [stdout]    --> src/compiler/dependencies.rs:148:69
[INFO] [stdout]     |
[INFO] [stdout] 146 |     use super::*;
[INFO] [stdout]     |         -------- the item `Name` is already imported here
[INFO] [stdout] 147 |     use crate::compiler::parser::{Exposing, Import};
[INFO] [stdout] 148 |     use crate::compiler::{canonical, parser, Interface, ModuleName, Name, PackageName};
[INFO] [stdout]     |                                                                     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Position` is imported redundantly
[INFO] [stdout]    --> src/compiler/parser/layout.rs:398:9
[INFO] [stdout]     |
[INFO] [stdout] 396 |     use super::*;
[INFO] [stdout]     |         -------- the item `Position` is already imported here
[INFO] [stdout] 397 |     use crate::compiler::parser::*;
[INFO] [stdout] 398 |     use crate::compiler::position::Position;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Token` is imported redundantly
[INFO] [stdout]    --> src/compiler/parser/layout.rs:399:9
[INFO] [stdout]     |
[INFO] [stdout] 396 |     use super::*;
[INFO] [stdout]     |         -------- the item `Token` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 399 |     use tokenizer::Token;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `associativity` and `precedence` are never read
[INFO] [stdout]   --> src/compiler/canonical/mod.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub struct Infix {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 80 |     associativity: Associativity,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 81 |     precedence: u8,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Infix` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `pattern` and `expression` are never read
[INFO] [stdout]    --> src/compiler/canonical/mod.rs:420:5
[INFO] [stdout]     |
[INFO] [stdout] 419 | pub struct CaseBranch {
[INFO] [stdout]     |            ---------- fields in this struct
[INFO] [stdout] 420 |     pattern: Pattern,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 421 |     expression: Expression,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaseBranch` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `insert_local_value` is never used
[INFO] [stdout]   --> src/compiler/canonical/environment.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub trait Environment<'parent>: std::fmt::Debug {
[INFO] [stdout]    |           ----------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn insert_local_value(&mut self, name: &Name);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `module_name` and `relative_path` are never read
[INFO] [stdout]   --> src/compiler/source/files.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct SourceFile {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 11 |     module_name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 12 |     relative_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SourceFile` 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 `value` is never read
[INFO] [stdout]    --> src/compiler/typer/mod.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 140 |     Int {
[INFO] [stdout]     |     --- field in this variant
[INFO] [stdout] 141 |         tpe: Type,
[INFO] [stdout] 142 |         value: u32,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]    --> src/compiler/typer/mod.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |     Bool {
[INFO] [stdout]     |     ---- field in this variant
[INFO] [stdout] 145 |         tpe: Type,
[INFO] [stdout] 146 |         value: bool,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]    --> src/compiler/typer/mod.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |     Identifier {
[INFO] [stdout]     |     ---------- field in this variant
[INFO] [stdout] 150 |         tpe: Type,
[INFO] [stdout] 151 |         name: String,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `associativity` and `precedence` are never read
[INFO] [stdout]   --> src/compiler/canonical/mod.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub struct Infix {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 80 |     associativity: Associativity,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 81 |     precedence: u8,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Infix` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `pattern` and `expression` are never read
[INFO] [stdout]    --> src/compiler/canonical/mod.rs:420:5
[INFO] [stdout]     |
[INFO] [stdout] 419 | pub struct CaseBranch {
[INFO] [stdout]     |            ---------- fields in this struct
[INFO] [stdout] 420 |     pattern: Pattern,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 421 |     expression: Expression,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CaseBranch` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `insert_local_value` is never used
[INFO] [stdout]   --> src/compiler/canonical/environment.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub trait Environment<'parent>: std::fmt::Debug {
[INFO] [stdout]    |           ----------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn insert_local_value(&mut self, name: &Name);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `module_name` and `relative_path` are never read
[INFO] [stdout]   --> src/compiler/source/files.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct SourceFile {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 11 |     module_name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 12 |     relative_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SourceFile` 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 `value` is never read
[INFO] [stdout]    --> src/compiler/typer/mod.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 140 |     Int {
[INFO] [stdout]     |     --- field in this variant
[INFO] [stdout] 141 |         tpe: Type,
[INFO] [stdout] 142 |         value: u32,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]    --> src/compiler/typer/mod.rs:146:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |     Bool {
[INFO] [stdout]     |     ---- field in this variant
[INFO] [stdout] 145 |         tpe: Type,
[INFO] [stdout] 146 |         value: bool,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]    --> src/compiler/typer/mod.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |     Identifier {
[INFO] [stdout]     |     ---------- field in this variant
[INFO] [stdout] 150 |         tpe: Type,
[INFO] [stdout] 151 |         name: String,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 23.79s
[INFO] running `Command { std: "docker" "inspect" "69319c9729cc9653450285b8320b11f07fb2190adb9ac58016d18e740bc21cc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69319c9729cc9653450285b8320b11f07fb2190adb9ac58016d18e740bc21cc3", kill_on_drop: false }`
[INFO] [stdout] 69319c9729cc9653450285b8320b11f07fb2190adb9ac58016d18e740bc21cc3