[INFO] cloning repository https://github.com/pigeon-project/pigeon_core
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pigeon-project/pigeon_core" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpigeon-project%2Fpigeon_core", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpigeon-project%2Fpigeon_core'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 26fb18ab2ea1e15289838e10f40ea80adf88cd2f
[INFO] testing pigeon-project/pigeon_core against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpigeon-project%2Fpigeon_core" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pigeon-project/pigeon_core on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pigeon-project/pigeon_core
[INFO] finished tweaking git repo https://github.com/pigeon-project/pigeon_core
[INFO] tweaked toml for git repo https://github.com/pigeon-project/pigeon_core written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/pigeon-project/pigeon_core already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_json v1.0.46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83844b09d33a44de3d327782721c764d293ee25f2ec81c2284ae8c9924b43fbd
[INFO] running `Command { std: "docker" "start" "-a" "83844b09d33a44de3d327782721c764d293ee25f2ec81c2284ae8c9924b43fbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83844b09d33a44de3d327782721c764d293ee25f2ec81c2284ae8c9924b43fbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83844b09d33a44de3d327782721c764d293ee25f2ec81c2284ae8c9924b43fbd", kill_on_drop: false }`
[INFO] [stdout] 83844b09d33a44de3d327782721c764d293ee25f2ec81c2284ae8c9924b43fbd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b417ff137d7d6c38ca023cd11dd0e461d30f3cbd2129fe366c34934f65042a08
[INFO] running `Command { std: "docker" "start" "-a" "b417ff137d7d6c38ca023cd11dd0e461d30f3cbd2129fe366c34934f65042a08", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling serde_json v1.0.46
[INFO] [stderr]    Compiling pigeon_core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `serde::export::fmt::Error`
[INFO] [stdout]  --> src/mata_info/ast.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde::export::fmt::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::export::Formatter`
[INFO] [stdout]  --> src/mata_info/ast.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::export::Formatter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Display`
[INFO] [stdout]  --> src/mata_info/ast.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::path::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde_json`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mata_info::ast`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use mata_info::ast;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mata_info::ast::Expr`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use mata_info::ast::Expr;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mata_info::ast::Literal::Bool`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use mata_info::ast::Literal::Bool;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::cell::RefCell;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::size_of`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::mem::size_of;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/type_checker.rs:108:20
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 Ok(res) => unimplemented!(),
[INFO] [stdout]     |                    ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `TYPE_ASSERT_ERR`
[INFO] [stdout]  --> src/type_checker.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | const TYPE_ASSERT_ERR: RErrorInfo = ("T0", "Expression type assertion error");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CALLEE_IS_NOT_FUNCTION_TYPE`
[INFO] [stdout]  --> src/type_checker.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const CALLEE_IS_NOT_FUNCTION_TYPE: RErrorInfo = ("T1", "Callee is not a function type");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `VARIABLE_IS_NOT_DEFINED`
[INFO] [stdout]  --> src/type_checker.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const VARIABLE_IS_NOT_DEFINED: RErrorInfo = ("T2", "Variable is not defined");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `UNIFICATION_ERROR`
[INFO] [stdout]  --> src/type_checker.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const UNIFICATION_ERROR: &'static str = "T3";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `new_path_level`
[INFO] [stdout]  --> src/type_checker.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn new_path_level(path: &Path, pos: u64) -> Path {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_unification_error`
[INFO] [stdout]   --> src/type_checker.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn make_unification_error(i: String) -> Result<(), ErrorInfo> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `unifier`
[INFO] [stdout]   --> src/type_checker.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn unifier(ty1: &TypeExpr, ty2: &TypeExpr) -> Result<(), ErrorInfo> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `literal_infer`
[INFO] [stdout]   --> src/type_checker.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn literal_infer(lit: Literal) -> TypeExpr {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `expr_infer`
[INFO] [stdout]   --> src/type_checker.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn expr_infer(context: &Context, expr: Expr, path: Path) -> CompileResult<TypeExpr> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tree_node_assert`
[INFO] [stdout]   --> src/mata_info/node.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn tree_node_assert(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lit2ast`
[INFO] [stdout]   --> src/mata_info/node.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn lit2ast<T: std::str::FromStr>(&self, fun: fn(T) -> ast::Literal) -> Result<Expr, ()> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_ast`
[INFO] [stdout]   --> src/mata_info/node.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn to_ast(&self) -> Result<Expr, ()> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `CompileResult`
[INFO] [stdout]   --> src/mata_info/ast.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub type CompileResult<T> = Result<T, Vec<CompileError>>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unpack`
[INFO] [stdout]    --> src/mata_info/ast.rs:186:8
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn unpack(self) -> Expr {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.73s
[INFO] running `Command { std: "docker" "inspect" "b417ff137d7d6c38ca023cd11dd0e461d30f3cbd2129fe366c34934f65042a08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b417ff137d7d6c38ca023cd11dd0e461d30f3cbd2129fe366c34934f65042a08", kill_on_drop: false }`
[INFO] [stdout] b417ff137d7d6c38ca023cd11dd0e461d30f3cbd2129fe366c34934f65042a08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d58b94fd8d17aef119b3c56ea153b91c64272f93cb6597aecb64473f12ece04
[INFO] running `Command { std: "docker" "start" "-a" "4d58b94fd8d17aef119b3c56ea153b91c64272f93cb6597aecb64473f12ece04", kill_on_drop: false }`
[INFO] [stderr]    Compiling pigeon_core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `serde::export::fmt::Error`
[INFO] [stdout]  --> src/mata_info/ast.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use serde::export::fmt::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::export::Formatter`
[INFO] [stdout]  --> src/mata_info/ast.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::export::Formatter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Display`
[INFO] [stdout]  --> src/mata_info/ast.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::path::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mata_info::ast`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use mata_info::ast;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::cell::RefCell;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem::size_of`
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use std::mem::size_of;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/type_checker.rs:108:20
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 Ok(res) => unimplemented!(),
[INFO] [stdout]     |                    ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `TYPE_ASSERT_ERR`
[INFO] [stdout]  --> src/type_checker.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | const TYPE_ASSERT_ERR: RErrorInfo = ("T0", "Expression type assertion error");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `CALLEE_IS_NOT_FUNCTION_TYPE`
[INFO] [stdout]  --> src/type_checker.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | const CALLEE_IS_NOT_FUNCTION_TYPE: RErrorInfo = ("T1", "Callee is not a function type");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `VARIABLE_IS_NOT_DEFINED`
[INFO] [stdout]  --> src/type_checker.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const VARIABLE_IS_NOT_DEFINED: RErrorInfo = ("T2", "Variable is not defined");
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `UNIFICATION_ERROR`
[INFO] [stdout]  --> src/type_checker.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | const UNIFICATION_ERROR: &'static str = "T3";
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `new_path_level`
[INFO] [stdout]  --> src/type_checker.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn new_path_level(path: &Path, pos: u64) -> Path {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `make_unification_error`
[INFO] [stdout]   --> src/type_checker.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn make_unification_error(i: String) -> Result<(), ErrorInfo> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `unifier`
[INFO] [stdout]   --> src/type_checker.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn unifier(ty1: &TypeExpr, ty2: &TypeExpr) -> Result<(), ErrorInfo> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `literal_infer`
[INFO] [stdout]   --> src/type_checker.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn literal_infer(lit: Literal) -> TypeExpr {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `expr_infer`
[INFO] [stdout]   --> src/type_checker.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn expr_infer(context: &Context, expr: Expr, path: Path) -> CompileResult<TypeExpr> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tree_node_assert`
[INFO] [stdout]   --> src/mata_info/node.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn tree_node_assert(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lit2ast`
[INFO] [stdout]   --> src/mata_info/node.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 |     fn lit2ast<T: std::str::FromStr>(&self, fun: fn(T) -> ast::Literal) -> Result<Expr, ()> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_ast`
[INFO] [stdout]   --> src/mata_info/node.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn to_ast(&self) -> Result<Expr, ()> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `CompileResult`
[INFO] [stdout]   --> src/mata_info/ast.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub type CompileResult<T> = Result<T, Vec<CompileError>>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unpack`
[INFO] [stdout]    --> src/mata_info/ast.rs:186:8
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn unpack(self) -> Expr {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 23 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.45s
[INFO] running `Command { std: "docker" "inspect" "4d58b94fd8d17aef119b3c56ea153b91c64272f93cb6597aecb64473f12ece04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d58b94fd8d17aef119b3c56ea153b91c64272f93cb6597aecb64473f12ece04", kill_on_drop: false }`
[INFO] [stdout] 4d58b94fd8d17aef119b3c56ea153b91c64272f93cb6597aecb64473f12ece04
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3c1d328f95101ea39a2b0d715c903172f5a90d4e4516bda67134cb8df5614544
[INFO] running `Command { std: "docker" "start" "-a" "3c1d328f95101ea39a2b0d715c903172f5a90d4e4516bda67134cb8df5614544", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `serde::export::fmt::Error`
[INFO] [stderr]  --> src/mata_info/ast.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use serde::export::fmt::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `serde::export::Formatter`
[INFO] [stderr]  --> src/mata_info/ast.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use serde::export::Formatter;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Display`
[INFO] [stderr]  --> src/mata_info/ast.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::path::Display;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Read`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::io::Read;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `mata_info::ast`
[INFO] [stderr]   --> src/main.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use mata_info::ast;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use std::cell::RefCell;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem::size_of`
[INFO] [stderr]   --> src/main.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 | use std::mem::size_of;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]    --> src/type_checker.rs:108:20
[INFO] [stderr]     |
[INFO] [stderr] 108 |                 Ok(res) => unimplemented!(),
[INFO] [stderr]     |                    ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `TYPE_ASSERT_ERR`
[INFO] [stderr]  --> src/type_checker.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | const TYPE_ASSERT_ERR: RErrorInfo = ("T0", "Expression type assertion error");
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `CALLEE_IS_NOT_FUNCTION_TYPE`
[INFO] [stderr]  --> src/type_checker.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | const CALLEE_IS_NOT_FUNCTION_TYPE: RErrorInfo = ("T1", "Callee is not a function type");
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `VARIABLE_IS_NOT_DEFINED`
[INFO] [stderr]  --> src/type_checker.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | const VARIABLE_IS_NOT_DEFINED: RErrorInfo = ("T2", "Variable is not defined");
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `UNIFICATION_ERROR`
[INFO] [stderr]  --> src/type_checker.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | const UNIFICATION_ERROR: &'static str = "T3";
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_path_level`
[INFO] [stderr]  --> src/type_checker.rs:8:4
[INFO] [stderr]   |
[INFO] [stderr] 8 | fn new_path_level(path: &Path, pos: u64) -> Path {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `make_unification_error`
[INFO] [stderr]   --> src/type_checker.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn make_unification_error(i: String) -> Result<(), ErrorInfo> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `unifier`
[INFO] [stderr]   --> src/type_checker.rs:18:4
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn unifier(ty1: &TypeExpr, ty2: &TypeExpr) -> Result<(), ErrorInfo> {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `literal_infer`
[INFO] [stderr]   --> src/type_checker.rs:43:4
[INFO] [stderr]    |
[INFO] [stderr] 43 | fn literal_infer(lit: Literal) -> TypeExpr {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `expr_infer`
[INFO] [stderr]   --> src/type_checker.rs:69:4
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn expr_infer(context: &Context, expr: Expr, path: Path) -> CompileResult<TypeExpr> {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `tree_node_assert`
[INFO] [stderr]   --> src/mata_info/node.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn tree_node_assert(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `lit2ast`
[INFO] [stderr]   --> src/mata_info/node.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn lit2ast<T: std::str::FromStr>(&self, fun: fn(T) -> ast::Literal) -> Result<Expr, ()> {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `to_ast`
[INFO] [stderr]   --> src/mata_info/node.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn to_ast(&self) -> Result<Expr, ()> {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `CompileResult`
[INFO] [stderr]   --> src/mata_info/ast.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub type CompileResult<T> = Result<T, Vec<CompileError>>;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `unpack`
[INFO] [stderr]    --> src/mata_info/ast.rs:186:8
[INFO] [stderr]     |
[INFO] [stderr] 186 |     fn unpack(self) -> Expr {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `pigeon_core` (bin "pigeon_core" test) generated 23 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/pigeon_core-40d068a31c4380bc)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test write_expr ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3c1d328f95101ea39a2b0d715c903172f5a90d4e4516bda67134cb8df5614544", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c1d328f95101ea39a2b0d715c903172f5a90d4e4516bda67134cb8df5614544", kill_on_drop: false }`
[INFO] [stdout] 3c1d328f95101ea39a2b0d715c903172f5a90d4e4516bda67134cb8df5614544