[INFO] cloning repository https://github.com/hamptonmoore/optimizing-brainfuck-compiler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hamptonmoore/optimizing-brainfuck-compiler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhamptonmoore%2Foptimizing-brainfuck-compiler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhamptonmoore%2Foptimizing-brainfuck-compiler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cd84d8c09569f77b7f50029ac64eebade3174ac7
[INFO] checking hamptonmoore/optimizing-brainfuck-compiler against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhamptonmoore%2Foptimizing-brainfuck-compiler" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hamptonmoore/optimizing-brainfuck-compiler on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hamptonmoore/optimizing-brainfuck-compiler
[INFO] finished tweaking git repo https://github.com/hamptonmoore/optimizing-brainfuck-compiler
[INFO] tweaked toml for git repo https://github.com/hamptonmoore/optimizing-brainfuck-compiler written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/hamptonmoore/optimizing-brainfuck-compiler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df1e3f58e88218a652fbb4044f09292410ed1a6193b1e4b04169a13ea6b39a20
[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" "df1e3f58e88218a652fbb4044f09292410ed1a6193b1e4b04169a13ea6b39a20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df1e3f58e88218a652fbb4044f09292410ed1a6193b1e4b04169a13ea6b39a20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df1e3f58e88218a652fbb4044f09292410ed1a6193b1e4b04169a13ea6b39a20", kill_on_drop: false }`
[INFO] [stdout] df1e3f58e88218a652fbb4044f09292410ed1a6193b1e4b04169a13ea6b39a20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 400c4cd044928bca90c9bd1e481b6d4aead4146d3ab6a24ed774c70c7d8d67b8
[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" "400c4cd044928bca90c9bd1e481b6d4aead4146d3ab6a24ed774c70c7d8d67b8", kill_on_drop: false }`
[INFO] [stderr]     Checking optimizing-brainfuck-compiler v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `stdout`
[INFO] [stdout]   --> src/main.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |     use std::io::{stdin,stdout};
[INFO] [stdout]    |                         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `stdout`
[INFO] [stdout]   --> src/main.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 |     use std::io::{stdin,stdout};
[INFO] [stdout]    |                         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/main.rs:68:17
[INFO] [stdout]    |
[INFO] [stdout] 68 |                 Instruction::Input => {},
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/main.rs:68:17
[INFO] [stdout]    |
[INFO] [stdout] 68 |                 Instruction::Input => {},
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |                     stdin().read_line(&mut s);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |                     stdin().read_line(&mut s);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `Command { std: "docker" "inspect" "400c4cd044928bca90c9bd1e481b6d4aead4146d3ab6a24ed774c70c7d8d67b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "400c4cd044928bca90c9bd1e481b6d4aead4146d3ab6a24ed774c70c7d8d67b8", kill_on_drop: false }`
[INFO] [stdout] 400c4cd044928bca90c9bd1e481b6d4aead4146d3ab6a24ed774c70c7d8d67b8