[INFO] cloning repository https://github.com/ItsaMeTuni/brainfuck-plus
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ItsaMeTuni/brainfuck-plus" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FItsaMeTuni%2Fbrainfuck-plus", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FItsaMeTuni%2Fbrainfuck-plus'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8c65a6bb7c95626dd3ff52c5f5c2c1707eb88c3
[INFO] checking ItsaMeTuni/brainfuck-plus against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FItsaMeTuni%2Fbrainfuck-plus" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ItsaMeTuni/brainfuck-plus on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ItsaMeTuni/brainfuck-plus
[INFO] finished tweaking git repo https://github.com/ItsaMeTuni/brainfuck-plus
[INFO] tweaked toml for git repo https://github.com/ItsaMeTuni/brainfuck-plus written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/ItsaMeTuni/brainfuck-plus already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bea94d8375315ed0a01d4aa3c2ba2664c8df122964202b6ef96147e973def864
[INFO] running `Command { std: "docker" "start" "-a" "bea94d8375315ed0a01d4aa3c2ba2664c8df122964202b6ef96147e973def864", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bea94d8375315ed0a01d4aa3c2ba2664c8df122964202b6ef96147e973def864", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bea94d8375315ed0a01d4aa3c2ba2664c8df122964202b6ef96147e973def864", kill_on_drop: false }`
[INFO] [stdout] bea94d8375315ed0a01d4aa3c2ba2664c8df122964202b6ef96147e973def864
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 445d5723e99150dc0b518925bde7ceb2b26ea7b641632cfec03370cc48f3d2ef
[INFO] running `Command { std: "docker" "start" "-a" "445d5723e99150dc0b518925bde7ceb2b26ea7b641632cfec03370cc48f3d2ef", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking brainfuck-compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/interpreter.rs:48:53
[INFO] [stdout]    |
[INFO] [stdout] 48 |                     CommandNode::CacheUp => cache = (*mem_cell),
[INFO] [stdout]    |                                                     ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/interpreter.rs:48:53
[INFO] [stdout]    |
[INFO] [stdout] 48 |                     CommandNode::CacheUp => cache = (*mem_cell),
[INFO] [stdout]    |                                                     ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ast.rs:68:21
[INFO] [stdout]    |
[INFO] [stdout] 68 |         if let Some(mut parent) = scope_stack.last_mut()
[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]   --> src/interpreter.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |     let mut reader = stdin();
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `MissingScopeOpenToken`
[INFO] [stdout]   --> src/ast.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     MissingScopeOpenToken,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ast.rs:68:21
[INFO] [stdout]    |
[INFO] [stdout] 68 |         if let Some(mut parent) = scope_stack.last_mut()
[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]   --> src/interpreter.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |     let mut reader = stdin();
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `MissingScopeOpenToken`
[INFO] [stdout]   --> src/ast.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     MissingScopeOpenToken,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "445d5723e99150dc0b518925bde7ceb2b26ea7b641632cfec03370cc48f3d2ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "445d5723e99150dc0b518925bde7ceb2b26ea7b641632cfec03370cc48f3d2ef", kill_on_drop: false }`
[INFO] [stdout] 445d5723e99150dc0b518925bde7ceb2b26ea7b641632cfec03370cc48f3d2ef