[INFO] cloning repository https://github.com/adam-peter/png_me
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/adam-peter/png_me" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadam-peter%2Fpng_me", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadam-peter%2Fpng_me'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 61635238bd0fa27b9816682ebf17f918434433eb
[INFO] checking adam-peter/png_me against try#2b43d8e161cfe46fae25518efb124c3c1d0fa392 for pr-145604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadam-peter%2Fpng_me" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/adam-peter/png_me
[INFO] finished tweaking git repo https://github.com/adam-peter/png_me
[INFO] tweaked toml for git repo https://github.com/adam-peter/png_me written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/adam-peter/png_me on toolchain 2b43d8e161cfe46fae25518efb124c3c1d0fa392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b43d8e161cfe46fae25518efb124c3c1d0fa392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/adam-peter/png_me 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" "+2b43d8e161cfe46fae25518efb124c3c1d0fa392" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+2b43d8e161cfe46fae25518efb124c3c1d0fa392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 44a51ed980aefa9ab4b6f01b5bb5e3f64f35f63ab636db981b04e991f957650f
[INFO] running `Command { std: "docker" "start" "-a" "44a51ed980aefa9ab4b6f01b5bb5e3f64f35f63ab636db981b04e991f957650f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "44a51ed980aefa9ab4b6f01b5bb5e3f64f35f63ab636db981b04e991f957650f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44a51ed980aefa9ab4b6f01b5bb5e3f64f35f63ab636db981b04e991f957650f", kill_on_drop: false }`
[INFO] [stdout] 44a51ed980aefa9ab4b6f01b5bb5e3f64f35f63ab636db981b04e991f957650f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+2b43d8e161cfe46fae25518efb124c3c1d0fa392" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8ececcc7e19796eda476c9f12c259303f5d2ba2ac6c0ddf3c17c80363ed27ed
[INFO] running `Command { std: "docker" "start" "-a" "e8ececcc7e19796eda476c9f12c259303f5d2ba2ac6c0ddf3c17c80363ed27ed", kill_on_drop: false }`
[INFO] [stderr]     Checking png_me v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Chunk` is never constructed
[INFO] [stdout]  --> src/chunk_type.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Chunk {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/chunk_type.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Chunk {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 13 |     pub fn new() -> Chunk {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ChunkType` is never constructed
[INFO] [stdout]   --> src/chunk_type.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct ChunkType {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ParseStringError` is never constructed
[INFO] [stdout]   --> src/chunk_type.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | struct ParseStringError;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `bytes`, `is_valid`, `is_critical`, `is_public`, `is_reserved_bit_valid`, and `is_safe_to_copy` are never used
[INFO] [stdout]   --> src/chunk_type.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl ChunkType {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 70 |     pub fn bytes(&self) -> [u8; 4] {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     fn is_valid(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |     fn is_critical(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     fn is_public(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 86 |     fn is_reserved_bit_valid(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 90 |     fn is_safe_to_copy(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Chunk` is never constructed
[INFO] [stdout]  --> src/chunk_type.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Chunk {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/chunk_type.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Chunk {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 13 |     pub fn new() -> Chunk {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "e8ececcc7e19796eda476c9f12c259303f5d2ba2ac6c0ddf3c17c80363ed27ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8ececcc7e19796eda476c9f12c259303f5d2ba2ac6c0ddf3c17c80363ed27ed", kill_on_drop: false }`
[INFO] [stdout] e8ececcc7e19796eda476c9f12c259303f5d2ba2ac6c0ddf3c17c80363ed27ed