[INFO] cloning repository https://github.com/matt-porter/synacor-challenge [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matt-porter/synacor-challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatt-porter%2Fsynacor-challenge", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatt-porter%2Fsynacor-challenge'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 8806e74f13ee2433915153a09385a69fe58b1ed8 [INFO] checking matt-porter/synacor-challenge against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatt-porter%2Fsynacor-challenge" "/workspace/builds/worker-0/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/matt-porter/synacor-challenge on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/matt-porter/synacor-challenge [INFO] finished tweaking git repo https://github.com/matt-porter/synacor-challenge [INFO] tweaked toml for git repo https://github.com/matt-porter/synacor-challenge written to /workspace/builds/worker-0/source/Cargo.toml [INFO] crate git repo https://github.com/matt-porter/synacor-challenge already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] cd6219928b1414e89b4d02b4248662cc5d87096d9fa018d10b3ebf33d77453d0 [INFO] running `Command { std: "docker" "start" "-a" "cd6219928b1414e89b4d02b4248662cc5d87096d9fa018d10b3ebf33d77453d0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "cd6219928b1414e89b4d02b4248662cc5d87096d9fa018d10b3ebf33d77453d0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cd6219928b1414e89b4d02b4248662cc5d87096d9fa018d10b3ebf33d77453d0", kill_on_drop: false }` [INFO] [stdout] cd6219928b1414e89b4d02b4248662cc5d87096d9fa018d10b3ebf33d77453d0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 78970ee97299cef5ce519e04576b5699b49a7a896b4c6e8e1702c1161335a05c [INFO] running `Command { std: "docker" "start" "-a" "78970ee97299cef5ce519e04576b5699b49a7a896b4c6e8e1702c1161335a05c", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling memchr v2.2.1 [INFO] [stderr] Compiling libc v0.2.62 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Checking quick-error v1.2.2 [INFO] [stderr] Checking regex-syntax v0.6.12 [INFO] [stderr] Checking termcolor v1.0.5 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stderr] Checking humantime v1.3.0 [INFO] [stderr] Checking aho-corasick v0.7.6 [INFO] [stderr] Checking atty v0.2.13 [INFO] [stderr] Checking regex v1.3.1 [INFO] [stderr] Checking env_logger v0.7.0 [INFO] [stderr] Checking synacor v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::io::prelude::*` [INFO] [stdout] --> src/main.rs:372:5 [INFO] [stdout] | [INFO] [stdout] 372 | use std::io::prelude::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::prelude::*` [INFO] [stdout] --> src/main.rs:372:5 [INFO] [stdout] | [INFO] [stdout] 372 | use std::io::prelude::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/main.rs:330:9 [INFO] [stdout] | [INFO] [stdout] 329 | std::process::exit(0); [INFO] [stdout] | --------------------- any code following this expression is unreachable [INFO] [stdout] 330 | 0 [INFO] [stdout] | ^ unreachable expression [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `system` [INFO] [stdout] --> src/main.rs:97:14 [INFO] [stdout] | [INFO] [stdout] 97 | fn op_0_halt(system: &mut System) -> (){ [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_system` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `idx` [INFO] [stdout] --> src/main.rs:325:35 [INFO] [stdout] | [INFO] [stdout] 325 | fn op_18_ret(system: &mut System, idx: usize) -> usize { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_idx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `stdin` [INFO] [stdout] --> src/main.rs:354:9 [INFO] [stdout] | [INFO] [stdout] 354 | let stdin = io::stdin().read_exact(&mut buffer); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_stdin` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `system` [INFO] [stdout] --> src/main.rs:362:15 [INFO] [stdout] | [INFO] [stdout] 362 | fn op_21_noop(system: &mut System, idx: usize) -> usize { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_system` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v5` [INFO] [stdout] --> src/main.rs:401:9 [INFO] [stdout] | [INFO] [stdout] 401 | let v5 = v3 + v4; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v5` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable expression [INFO] [stdout] --> src/main.rs:330:9 [INFO] [stdout] | [INFO] [stdout] 329 | std::process::exit(0); [INFO] [stdout] | --------------------- any code following this expression is unreachable [INFO] [stdout] 330 | 0 [INFO] [stdout] | ^ unreachable expression [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unreachable_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `system` [INFO] [stdout] --> src/main.rs:97:14 [INFO] [stdout] | [INFO] [stdout] 97 | fn op_0_halt(system: &mut System) -> (){ [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_system` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `idx` [INFO] [stdout] --> src/main.rs:325:35 [INFO] [stdout] | [INFO] [stdout] 325 | fn op_18_ret(system: &mut System, idx: usize) -> usize { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_idx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `stdin` [INFO] [stdout] --> src/main.rs:354:9 [INFO] [stdout] | [INFO] [stdout] 354 | let stdin = io::stdin().read_exact(&mut buffer); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_stdin` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `system` [INFO] [stdout] --> src/main.rs:362:15 [INFO] [stdout] | [INFO] [stdout] 362 | fn op_21_noop(system: &mut System, idx: usize) -> usize { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_system` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v5` [INFO] [stdout] --> src/main.rs:401:9 [INFO] [stdout] | [INFO] [stdout] 401 | let v5 = v3 + v4; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v5` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:168:9 [INFO] [stdout] | [INFO] [stdout] 168 | let mut idx = idx + 1; [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/main.rs:168:9 [INFO] [stdout] | [INFO] [stdout] 168 | let mut idx = idx + 1; [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/main.rs:321:9 [INFO] [stdout] | [INFO] [stdout] 321 | let mut idx = idx + 1; [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:321:9 [INFO] [stdout] | [INFO] [stdout] 321 | let mut idx = idx + 1; [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:380:9 [INFO] [stdout] | [INFO] [stdout] 380 | let mut iter = buffer.chunks(2); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:380:9 [INFO] [stdout] | [INFO] [stdout] 380 | let mut iter = buffer.chunks(2); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `Value` [INFO] [stdout] --> src/main.rs:366:6 [INFO] [stdout] | [INFO] [stdout] 366 | enum Value { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `Value` [INFO] [stdout] --> src/main.rs:366:6 [INFO] [stdout] | [INFO] [stdout] 366 | enum Value { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 11 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 12.85s [INFO] running `Command { std: "docker" "inspect" "78970ee97299cef5ce519e04576b5699b49a7a896b4c6e8e1702c1161335a05c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "78970ee97299cef5ce519e04576b5699b49a7a896b4c6e8e1702c1161335a05c", kill_on_drop: false }` [INFO] [stdout] 78970ee97299cef5ce519e04576b5699b49a7a896b4c6e8e1702c1161335a05c