[INFO] cloning repository https://github.com/AliasT/craftinginterpreters
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AliasT/craftinginterpreters" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAliasT%2Fcraftinginterpreters", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAliasT%2Fcraftinginterpreters'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dd806d2e9fdeefecdca38f77e6d5e082d7274bac
[INFO] testing AliasT/craftinginterpreters against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAliasT%2Fcraftinginterpreters" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AliasT/craftinginterpreters 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/AliasT/craftinginterpreters
[INFO] finished tweaking git repo https://github.com/AliasT/craftinginterpreters
[INFO] tweaked toml for git repo https://github.com/AliasT/craftinginterpreters written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/AliasT/craftinginterpreters 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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 3913f316bd3e4588d42341397e64780720bdd1f5fea2c8d17a42003bba4ac4c1
[INFO] running `Command { std: "docker" "start" "-a" "3913f316bd3e4588d42341397e64780720bdd1f5fea2c8d17a42003bba4ac4c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3913f316bd3e4588d42341397e64780720bdd1f5fea2c8d17a42003bba4ac4c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3913f316bd3e4588d42341397e64780720bdd1f5fea2c8d17a42003bba4ac4c1", kill_on_drop: false }`
[INFO] [stdout] 3913f316bd3e4588d42341397e64780720bdd1f5fea2c8d17a42003bba4ac4c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] cf2421d715f0ee054731b5f6fb510c98bb210295c115e45c712f7e82bfa23636
[INFO] running `Command { std: "docker" "start" "-a" "cf2421d715f0ee054731b5f6fb510c98bb210295c115e45c712f7e82bfa23636", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling siphasher v0.3.7
[INFO] [stderr]    Compiling phf_shared v0.10.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling phf_generator v0.10.0
[INFO] [stderr]    Compiling phf_macros v0.10.0
[INFO] [stderr]    Compiling phf v0.10.0
[INFO] [stderr]    Compiling crafting v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `TokenType`
[INFO] [stdout]  --> src/lang/ast.rs:3:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::token::{Object, Token, TokenType};
[INFO] [stdout]   |                                   ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::btree_set::Union`, `env`
[INFO] [stdout]  --> src/lang/compiler.rs:3:42
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{borrow::Borrow, cell::RefCell, collections::btree_set::Union, env, rc::Rc};
[INFO] [stdout]   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::lang::environment`
[INFO] [stdout]  --> src/lang/compiler.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::lang::environment;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `callee`
[INFO] [stdout]   --> src/lang/ast.rs:42:34
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stdout]    |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_callee`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `paren`
[INFO] [stdout]   --> src/lang/ast.rs:42:42
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stdout]    |                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_paren`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arguments`
[INFO] [stdout]   --> src/lang/ast.rs:42:49
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stdout]    |                                                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/lang/compiler.rs:96:48
[INFO] [stdout]    |
[INFO] [stdout] 96 |                     if let Statement::Function(a, parameters, stmts) = function.borrow() {
[INFO] [stdout]    |                                                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/lang/token.rs:127:36
[INFO] [stdout]     |
[INFO] [stdout] 127 |             UnionObject::Reference(v) => todo!(),
[INFO] [stdout]     |                                    ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `walk`
[INFO] [stdout]   --> src/lang/ast.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn walk<F>(&self, visitor: &F) -> bool
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `A`
[INFO] [stdout]  --> src/playground/lifetime.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct A<'a> {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `B`
[INFO] [stdout]  --> src/playground/lifetime.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct B<'a> {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `C`
[INFO] [stdout]   --> src/playground/lifetime.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct C {}
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `test`
[INFO] [stdout]   --> src/playground/lifetime.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn test() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.27s
[INFO] running `Command { std: "docker" "inspect" "cf2421d715f0ee054731b5f6fb510c98bb210295c115e45c712f7e82bfa23636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf2421d715f0ee054731b5f6fb510c98bb210295c115e45c712f7e82bfa23636", kill_on_drop: false }`
[INFO] [stdout] cf2421d715f0ee054731b5f6fb510c98bb210295c115e45c712f7e82bfa23636
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] c553d860270f45a643de9df2917f9e6dd5cfcc89bafeaec0d03d2ff057bb1d35
[INFO] running `Command { std: "docker" "start" "-a" "c553d860270f45a643de9df2917f9e6dd5cfcc89bafeaec0d03d2ff057bb1d35", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `TokenType`
[INFO] [stdout]  --> src/lang/ast.rs:3:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::token::{Object, Token, TokenType};
[INFO] [stdout]   |                                   ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::btree_set::Union`, `env`
[INFO] [stdout]  --> src/lang/compiler.rs:3:42
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{borrow::Borrow, cell::RefCell, collections::btree_set::Union, env, rc::Rc};
[INFO] [stdout]   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::lang::environment`
[INFO] [stdout]  --> src/lang/compiler.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::lang::environment;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `callee`
[INFO] [stdout]   --> src/lang/ast.rs:42:34
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stdout]    |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_callee`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `paren`
[INFO] [stdout]   --> src/lang/ast.rs:42:42
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stdout]    |                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_paren`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arguments`
[INFO] [stdout]   --> src/lang/ast.rs:42:49
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stdout]    |                                                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/lang/compiler.rs:96:48
[INFO] [stdout]    |
[INFO] [stdout] 96 |                     if let Statement::Function(a, parameters, stmts) = function.borrow() {
[INFO] [stdout]    |                                                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/lang/token.rs:127:36
[INFO] [stdout]     |
[INFO] [stdout] 127 |             UnionObject::Reference(v) => todo!(),
[INFO] [stdout]     |                                    ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `walk`
[INFO] [stdout]   --> src/lang/ast.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn walk<F>(&self, visitor: &F) -> bool
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `A`
[INFO] [stdout]  --> src/playground/lifetime.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct A<'a> {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `B`
[INFO] [stdout]  --> src/playground/lifetime.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct B<'a> {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `C`
[INFO] [stdout]   --> src/playground/lifetime.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct C {}
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `test`
[INFO] [stdout]   --> src/playground/lifetime.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn test() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling crafting v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `collections::btree_set::Union`, `env`
[INFO] [stdout]  --> src/lang/compiler.rs:3:42
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{borrow::Borrow, cell::RefCell, collections::btree_set::Union, env, rc::Rc};
[INFO] [stdout]   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::lang::environment`
[INFO] [stdout]  --> src/lang/compiler.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::lang::environment;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/lang/ast.rs:72:14
[INFO] [stdout]    |
[INFO] [stdout] 72 |     e.walk(&|expr| {
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `callee`
[INFO] [stdout]   --> src/lang/ast.rs:42:34
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stdout]    |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_callee`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `paren`
[INFO] [stdout]   --> src/lang/ast.rs:42:42
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stdout]    |                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_paren`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arguments`
[INFO] [stdout]   --> src/lang/ast.rs:42:49
[INFO] [stdout]    |
[INFO] [stdout] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stdout]    |                                                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arguments`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/lang/compiler.rs:96:48
[INFO] [stdout]    |
[INFO] [stdout] 96 |                     if let Statement::Function(a, parameters, stmts) = function.borrow() {
[INFO] [stdout]    |                                                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/lang/token.rs:127:36
[INFO] [stdout]     |
[INFO] [stdout] 127 |             UnionObject::Reference(v) => todo!(),
[INFO] [stdout]     |                                    ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lang/ast.rs:71:9
[INFO] [stdout]    |
[INFO] [stdout] 71 |     let mut i = 0;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `A`
[INFO] [stdout]  --> src/playground/lifetime.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct A<'a> {
[INFO] [stdout]   |        ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `B`
[INFO] [stdout]  --> src/playground/lifetime.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct B<'a> {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `C`
[INFO] [stdout]   --> src/playground/lifetime.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct C {}
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `test`
[INFO] [stdout]   --> src/playground/lifetime.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn test() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 48.46s
[INFO] running `Command { std: "docker" "inspect" "c553d860270f45a643de9df2917f9e6dd5cfcc89bafeaec0d03d2ff057bb1d35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c553d860270f45a643de9df2917f9e6dd5cfcc89bafeaec0d03d2ff057bb1d35", kill_on_drop: false }`
[INFO] [stdout] c553d860270f45a643de9df2917f9e6dd5cfcc89bafeaec0d03d2ff057bb1d35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 41c77a4bc0dc760fa079ad98cdefaee20a690667d0040243ecef82f9a007e3ba
[INFO] running `Command { std: "docker" "start" "-a" "41c77a4bc0dc760fa079ad98cdefaee20a690667d0040243ecef82f9a007e3ba", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `TokenType`
[INFO] [stdout] 
[INFO] [stderr]  --> src/lang/ast.rs:3:35
[INFO] [stdout] running 4 tests
[INFO] [stderr]   |
[INFO] [stdout] test lang::ast::expression_display ... ok
[INFO] [stderr] 3 | use super::token::{Object, Token, TokenType};
[INFO] [stdout] test playground::lifetime::test ... ok
[INFO] [stderr]   |                                   ^^^^^^^^^
[INFO] [stdout] test lang::parser::test ... ok
[INFO] [stderr]   |
[INFO] [stdout] test lang::compiler::test ... ok
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] warning: unused imports: `collections::btree_set::Union`, `env`
[INFO] [stdout] 
[INFO] [stderr]  --> src/lang/compiler.rs:3:42
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::{borrow::Borrow, cell::RefCell, collections::btree_set::Union, env, rc::Rc};
[INFO] [stderr]   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::lang::environment`
[INFO] [stderr]  --> src/lang/compiler.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::lang::environment;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `callee`
[INFO] [stderr]   --> src/lang/ast.rs:42:34
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stderr]    |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_callee`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `paren`
[INFO] [stderr]   --> src/lang/ast.rs:42:42
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stderr]    |                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_paren`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arguments`
[INFO] [stderr]   --> src/lang/ast.rs:42:49
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stderr]    |                                                 ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_arguments`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/lang/compiler.rs:96:48
[INFO] [stderr]    |
[INFO] [stderr] 96 |                     if let Statement::Function(a, parameters, stmts) = function.borrow() {
[INFO] [stderr]    |                                                ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/lang/token.rs:127:36
[INFO] [stderr]     |
[INFO] [stderr] 127 |             UnionObject::Reference(v) => todo!(),
[INFO] [stderr]     |                                    ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `walk`
[INFO] [stderr]   --> src/lang/ast.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn walk<F>(&self, visitor: &F) -> bool
[INFO] [stderr]    |        ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `A`
[INFO] [stderr]  --> src/playground/lifetime.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct A<'a> {
[INFO] [stderr]   |        ^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `B`
[INFO] [stderr]  --> src/playground/lifetime.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct B<'a> {
[INFO] [stderr]   |        ^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `C`
[INFO] [stderr]   --> src/playground/lifetime.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 | struct C {}
[INFO] [stderr]    |        ^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `test`
[INFO] [stderr]   --> src/playground/lifetime.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn test() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `collections::btree_set::Union`, `env`
[INFO] [stderr]  --> src/lang/compiler.rs:3:42
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::{borrow::Borrow, cell::RefCell, collections::btree_set::Union, env, rc::Rc};
[INFO] [stderr]   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `expr`
[INFO] [stderr]   --> src/lang/ast.rs:72:14
[INFO] [stderr]    |
[INFO] [stderr] 72 |     e.walk(&|expr| {
[INFO] [stderr]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `callee`
[INFO] [stderr]   --> src/lang/ast.rs:42:34
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 Expression::Call(callee, paren, arguments) => todo!(),
[INFO] [stderr]    |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_callee`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lang/ast.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |     let mut i = 0;
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `A`
[INFO] [stderr]  --> src/playground/lifetime.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct A<'a> {
[INFO] [stderr]   |        ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `crafting` (lib) generated 13 warnings
[INFO] [stderr] warning: `crafting` (lib test) generated 13 warnings (8 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/crafting-19962fc9bad09d09)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/crafting-8ae200cc65bdf22a)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests crafting
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "41c77a4bc0dc760fa079ad98cdefaee20a690667d0040243ecef82f9a007e3ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41c77a4bc0dc760fa079ad98cdefaee20a690667d0040243ecef82f9a007e3ba", kill_on_drop: false }`
[INFO] [stdout] 41c77a4bc0dc760fa079ad98cdefaee20a690667d0040243ecef82f9a007e3ba