[INFO] cloning repository https://github.com/bigyihsuan/rusty_deque
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bigyihsuan/rusty_deque" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbigyihsuan%2Frusty_deque", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbigyihsuan%2Frusty_deque'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fa6edd5f16321a0aa8904eb28b3dfefb6a9c4fe2
[INFO] checking bigyihsuan/rusty_deque against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbigyihsuan%2Frusty_deque" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bigyihsuan/rusty_deque on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bigyihsuan/rusty_deque
[INFO] finished tweaking git repo https://github.com/bigyihsuan/rusty_deque
[INFO] tweaked toml for git repo https://github.com/bigyihsuan/rusty_deque written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/bigyihsuan/rusty_deque already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2495a429ff5175b1628381e9b89f37faeedeeee9f3c5d00f60df44b10ae9928a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2495a429ff5175b1628381e9b89f37faeedeeee9f3c5d00f60df44b10ae9928a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2495a429ff5175b1628381e9b89f37faeedeeee9f3c5d00f60df44b10ae9928a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2495a429ff5175b1628381e9b89f37faeedeeee9f3c5d00f60df44b10ae9928a", kill_on_drop: false }`
[INFO] [stdout] 2495a429ff5175b1628381e9b89f37faeedeeee9f3c5d00f60df44b10ae9928a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4dce9bdaadb3865b9fbc5395725aa66f8fdf7d70b65331cfcbdf8f1e3de7395b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4dce9bdaadb3865b9fbc5395725aa66f8fdf7d70b65331cfcbdf8f1e3de7395b", kill_on_drop: false }`
[INFO] [stderr]     Checking rusty_deque v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::usize`
[INFO] [stdout]    --> src/parser.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     use std::usize;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lexer::*`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use lexer::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::usize`
[INFO] [stdout]    --> src/parser.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |     use std::usize;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lexer::*`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use lexer::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let code =
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tokens`
[INFO] [stdout]    --> src/parser.rs:144:25
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn parse_tokens(tokens: &Vec<Token>) -> ast::Code {
[INFO] [stdout]     |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `code`
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let code =
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_code`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tokens`
[INFO] [stdout]    --> src/parser.rs:144:25
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn parse_tokens(tokens: &Vec<Token>) -> ast::Code {
[INFO] [stdout]     |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Instruction`
[INFO] [stdout]   --> src/parser.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Instruction(Instruction),
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/parser.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 51 |         fn new() -> TreePrinter {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `ParseState`
[INFO] [stdout]    --> src/parser.rs:131:10
[INFO] [stdout]     |
[INFO] [stdout] 131 |     enum ParseState {
[INFO] [stdout]     |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Instruction`
[INFO] [stdout]   --> src/parser.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Instruction(Instruction),
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/parser.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 51 |         fn new() -> TreePrinter {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `ParseState`
[INFO] [stdout]    --> src/parser.rs:131:10
[INFO] [stdout]     |
[INFO] [stdout] 131 |     enum ParseState {
[INFO] [stdout]     |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 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 0.57s
[INFO] running `Command { std: "docker" "inspect" "4dce9bdaadb3865b9fbc5395725aa66f8fdf7d70b65331cfcbdf8f1e3de7395b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dce9bdaadb3865b9fbc5395725aa66f8fdf7d70b65331cfcbdf8f1e3de7395b", kill_on_drop: false }`
[INFO] [stdout] 4dce9bdaadb3865b9fbc5395725aa66f8fdf7d70b65331cfcbdf8f1e3de7395b