[INFO] cloning repository https://github.com/ben-jl/rusty-lox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ben-jl/rusty-lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fben-jl%2Frusty-lox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fben-jl%2Frusty-lox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 10efa27a7f73b56fee06638e9c17ba71c5f1c904
[INFO] checking ben-jl/rusty-lox against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fben-jl%2Frusty-lox" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ben-jl/rusty-lox on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ben-jl/rusty-lox
[INFO] finished tweaking git repo https://github.com/ben-jl/rusty-lox
[INFO] tweaked toml for git repo https://github.com/ben-jl/rusty-lox written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ben-jl/rusty-lox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9fa41e632087dc473d3c1e8647b7d9a40c5df8ccbf2a718bd40cd03997b11649
[INFO] running `Command { std: "docker" "start" "-a" "9fa41e632087dc473d3c1e8647b7d9a40c5df8ccbf2a718bd40cd03997b11649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9fa41e632087dc473d3c1e8647b7d9a40c5df8ccbf2a718bd40cd03997b11649", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fa41e632087dc473d3c1e8647b7d9a40c5df8ccbf2a718bd40cd03997b11649", kill_on_drop: false }`
[INFO] [stdout] 9fa41e632087dc473d3c1e8647b7d9a40c5df8ccbf2a718bd40cd03997b11649
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bb5c35284830efe9fe3227ef044a3c9d4c4ffd016b41b7ab9eba7382c711878
[INFO] running `Command { std: "docker" "start" "-a" "0bb5c35284830efe9fe3227ef044a3c9d4c4ffd016b41b7ab9eba7382c711878", kill_on_drop: false }`
[INFO] [stderr]     Checking rlox-contract v0.1.0 (/opt/rustwide/workdir/rlox-contract)
[INFO] [stderr]     Checking rlox-scanner v0.1.0 (/opt/rustwide/workdir/rlox-scanner)
[INFO] [stdout] warning: unused variable: `temp_buffer`
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut temp_buffer : Vec<char> = vec![];
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temp_buffer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `full`
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut full = 0;
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_full`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:72:38
[INFO] [stdout]    |
[INFO] [stdout] 72 | ...                   for (idx, j) in chars[current_idx..].iter().enumerate() {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ix`
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:92:38
[INFO] [stdout]    |
[INFO] [stdout] 92 | ...                   for (ix, nxt_c) in chars[current_idx..].iter().enumerate() {
[INFO] [stdout]    |                            ^^ help: if this is intentional, prefix it with an underscore: `_ix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ix`
[INFO] [stdout]    --> rlox-scanner/src/lib.rs:111:38
[INFO] [stdout]     |
[INFO] [stdout] 111 | ...                   for (ix, nxt_c) in chars[current_idx+1..].iter().enumerate() {
[INFO] [stdout]     |                            ^^ help: if this is intentional, prefix it with an underscore: `_ix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ix`
[INFO] [stdout]    --> rlox-scanner/src/lib.rs:125:38
[INFO] [stdout]     |
[INFO] [stdout] 125 | ...                   for (ix, nxt_c) in chars[current_idx..].iter().enumerate() {
[INFO] [stdout]     |                            ^^ help: if this is intentional, prefix it with an underscore: `_ix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut temp_buffer : Vec<char> = vec![];
[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: variable does not need to be mutable
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut full = 0;
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `temp_buffer`
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut temp_buffer : Vec<char> = vec![];
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_temp_buffer`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `full`
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut full = 0;
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_full`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:72:38
[INFO] [stdout]    |
[INFO] [stdout] 72 | ...                   for (idx, j) in chars[current_idx..].iter().enumerate() {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ix`
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:92:38
[INFO] [stdout]    |
[INFO] [stdout] 92 | ...                   for (ix, nxt_c) in chars[current_idx..].iter().enumerate() {
[INFO] [stdout]    |                            ^^ help: if this is intentional, prefix it with an underscore: `_ix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ix`
[INFO] [stdout]    --> rlox-scanner/src/lib.rs:111:38
[INFO] [stdout]     |
[INFO] [stdout] 111 | ...                   for (ix, nxt_c) in chars[current_idx+1..].iter().enumerate() {
[INFO] [stdout]     |                            ^^ help: if this is intentional, prefix it with an underscore: `_ix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ix`
[INFO] [stdout]    --> rlox-scanner/src/lib.rs:125:38
[INFO] [stdout]     |
[INFO] [stdout] 125 | ...                   for (ix, nxt_c) in chars[current_idx..].iter().enumerate() {
[INFO] [stdout]     |                            ^^ help: if this is intentional, prefix it with an underscore: `_ix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut temp_buffer : Vec<char> = vec![];
[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: variable does not need to be mutable
[INFO] [stdout]   --> rlox-scanner/src/lib.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let mut full = 0;
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rlox-cli v0.1.0 (/opt/rustwide/workdir/rlox-cli)
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `IntoIter`
[INFO] [stdout]  --> rlox-cli/src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::vec::{Vec, IntoIter};
[INFO] [stdout]   |                     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TokenType`, `Token`
[INFO] [stdout]   --> rlox-cli/src/rlox_core/printer.rs:55:43
[INFO] [stdout]    |
[INFO] [stdout] 55 |     use crate::rlox_core::shared_models::{Token, TokenType};
[INFO] [stdout]    |                                           ^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ExprType`
[INFO] [stdout]  --> rlox-cli/src/rlox_core/parser.rs:1:45
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::rlox_core::shared_models::{Expr, ExprType, TokenType, Token};
[INFO] [stdout]   |                                             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> rlox-cli/src/rlox_core/executor.rs:1:55
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::rlox_core::shared_models::{Expr, ExprType, Token, TokenType};
[INFO] [stdout]   |                                                       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> rlox-cli/src/rlox_core/executor.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `IntoIter`
[INFO] [stdout]  --> rlox-cli/src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::vec::{Vec, IntoIter};
[INFO] [stdout]   |                     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ExprType`
[INFO] [stdout]  --> rlox-cli/src/rlox_core/parser.rs:1:45
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::rlox_core::shared_models::{Expr, ExprType, TokenType, Token};
[INFO] [stdout]   |                                             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> rlox-cli/src/rlox_core/executor.rs:1:55
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::rlox_core::shared_models::{Expr, ExprType, Token, TokenType};
[INFO] [stdout]   |                                                       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> rlox-cli/src/rlox_core/executor.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `has_parse_err` is assigned to, but never used
[INFO] [stdout]   --> rlox-cli/src/main.rs:67:21
[INFO] [stdout]    |
[INFO] [stdout] 67 |             let mut has_parse_err = false;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_has_parse_err` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_parse_err` is never read
[INFO] [stdout]   --> rlox-cli/src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |                 has_parse_err = true;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]  --> rlox-cli/src/rlox_core/parser.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (r, e) = expression(tokens)?;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `has_parse_err` is assigned to, but never used
[INFO] [stdout]   --> rlox-cli/src/main.rs:67:21
[INFO] [stdout]    |
[INFO] [stdout] 67 |             let mut has_parse_err = false;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_has_parse_err` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_parse_err` is never read
[INFO] [stdout]   --> rlox-cli/src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |                 has_parse_err = true;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]  --> rlox-cli/src/rlox_core/parser.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (r, e) = expression(tokens)?;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "0bb5c35284830efe9fe3227ef044a3c9d4c4ffd016b41b7ab9eba7382c711878", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bb5c35284830efe9fe3227ef044a3c9d4c4ffd016b41b7ab9eba7382c711878", kill_on_drop: false }`
[INFO] [stdout] 0bb5c35284830efe9fe3227ef044a3c9d4c4ffd016b41b7ab9eba7382c711878