[INFO] cloning repository https://github.com/robo-monk/mzip
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/robo-monk/mzip" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobo-monk%2Fmzip", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobo-monk%2Fmzip'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8749d0ecffb62e20aa578a4a48657068e3757d91
[INFO] checking robo-monk/mzip against try#b152f5575a2ac7126ae0019e4e679abe9399213e for pr-157841
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frobo-monk%2Fmzip" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/robo-monk/mzip
[INFO] finished tweaking git repo https://github.com/robo-monk/mzip
[INFO] tweaked toml for git repo https://github.com/robo-monk/mzip written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/robo-monk/mzip on toolchain b152f5575a2ac7126ae0019e4e679abe9399213e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b152f5575a2ac7126ae0019e4e679abe9399213e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/robo-monk/mzip already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b152f5575a2ac7126ae0019e4e679abe9399213e" "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-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 5b10136d3a8722872056cc0fcba8679c9461b1ffdf61516bf40f27dbd245f8ba
[INFO] running `Command { std: "docker" "start" "5b10136d3a8722872056cc0fcba8679c9461b1ffdf61516bf40f27dbd245f8ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5b10136d3a8722872056cc0fcba8679c9461b1ffdf61516bf40f27dbd245f8ba" "/opt/rustwide/cargo-home/bin/cargo" "+b152f5575a2ac7126ae0019e4e679abe9399213e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b10136d3a8722872056cc0fcba8679c9461b1ffdf61516bf40f27dbd245f8ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5b10136d3a8722872056cc0fcba8679c9461b1ffdf61516bf40f27dbd245f8ba" "/opt/rustwide/cargo-home/bin/cargo" "+b152f5575a2ac7126ae0019e4e679abe9399213e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking mzip v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `serialization`
[INFO] [stdout]   --> src/main.rs:57:27
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn from_serialization(serialization: String) -> Self {
[INFO] [stdout]    |                           ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_serialization`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `serialization`
[INFO] [stdout]   --> src/main.rs:57:27
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn from_serialization(serialization: String) -> Self {
[INFO] [stdout]    |                           ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_serialization`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let mut map: HashMap<char, u32> = HashMap::new();
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let mut map: HashMap<char, u32> = HashMap::new();
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `map`
[INFO] [stdout]    --> src/main.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let mut map: HashMap<char, u32> = HashMap::new();
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_map`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `map`
[INFO] [stdout]    --> src/main.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let mut map: HashMap<char, u32> = HashMap::new();
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_map`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `starter_bracket_index` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:196:9
[INFO] [stdout]     |
[INFO] [stdout] 196 |     let mut starter_bracket_index: i32 = -1;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_starter_bracket_index` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `starter_bracket_index` is assigned to, but never used
[INFO] [stdout]    --> src/main.rs:196:9
[INFO] [stdout]     |
[INFO] [stdout] 196 |     let mut starter_bracket_index: i32 = -1;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_starter_bracket_index` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `starter_bracket_index` is never read
[INFO] [stdout]    --> src/main.rs:206:17
[INFO] [stdout]     |
[INFO] [stdout] 206 |                 starter_bracket_index = i as i32;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `starter_bracket_index` is never read
[INFO] [stdout]    --> src/main.rs:206:17
[INFO] [stdout]     |
[INFO] [stdout] 206 |                 starter_bracket_index = i as i32;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `serialize_debug` is never used
[INFO] [stdout]   --> src/main.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl Node<(u32, char)> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 66 |     fn serialize_debug(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `serialize_debug` is never used
[INFO] [stdout]   --> src/main.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl Node<(u32, char)> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 66 |     fn serialize_debug(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "5b10136d3a8722872056cc0fcba8679c9461b1ffdf61516bf40f27dbd245f8ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b10136d3a8722872056cc0fcba8679c9461b1ffdf61516bf40f27dbd245f8ba", kill_on_drop: false }`
[INFO] [stdout] 5b10136d3a8722872056cc0fcba8679c9461b1ffdf61516bf40f27dbd245f8ba
