[INFO] cloning repository https://github.com/coreydexter/pngme
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/coreydexter/pngme" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoreydexter%2Fpngme", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoreydexter%2Fpngme'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4603e85586fe56995a7627845baa2f5c20fd3a2d
[INFO] checking coreydexter/pngme against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcoreydexter%2Fpngme" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/coreydexter/pngme
[INFO] finished tweaking git repo https://github.com/coreydexter/pngme
[INFO] tweaked toml for git repo https://github.com/coreydexter/pngme written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/coreydexter/pngme on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/coreydexter/pngme 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3acb8d7b3f7bf8bcdacabc89bd3e746aaf3f1654164fe1d36c06565a793b142
[INFO] running `Command { std: "docker" "start" "-a" "e3acb8d7b3f7bf8bcdacabc89bd3e746aaf3f1654164fe1d36c06565a793b142", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3acb8d7b3f7bf8bcdacabc89bd3e746aaf3f1654164fe1d36c06565a793b142", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3acb8d7b3f7bf8bcdacabc89bd3e746aaf3f1654164fe1d36c06565a793b142", kill_on_drop: false }`
[INFO] [stdout] e3acb8d7b3f7bf8bcdacabc89bd3e746aaf3f1654164fe1d36c06565a793b142
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 994f09e79d9ddb2164b619a6c18f88d1d357a2eae92be5aaf67c7d576a59f7de
[INFO] running `Command { std: "docker" "start" "-a" "994f09e79d9ddb2164b619a6c18f88d1d357a2eae92be5aaf67c7d576a59f7de", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking thiserror v1.0.25
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking pngme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::chunk_type::ChunkType`
[INFO] [stdout]    --> src/chunk.rs:226:9
[INFO] [stdout]     |
[INFO] [stdout] 226 |     use crate::chunk_type::ChunkType;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]    --> src/chunk.rs:227:9
[INFO] [stdout]     |
[INFO] [stdout] 227 |     use std::str::FromStr;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/png.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fs::{self, File},
[INFO] [stdout]   |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> src/png.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |     chunk::{self, Chunk, ChunkError},
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `File`
[INFO] [stdout]  --> src/png.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fs::{self, File},
[INFO] [stdout]   |                ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> src/png.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |     chunk::{self, Chunk, ChunkError},
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/png.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 |     io::{self, Read, Write},
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/chunk.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         source: FromUtf8Error,
[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 `source` is never read
[INFO] [stdout]   --> src/chunk.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         source: io::Error,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/chunk.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         source: ChunkTypeError,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/png.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         source: ChunkError,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/png.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         source: io::Error,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/png.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 |     io::{self, Read, Write},
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/chunk.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         source: FromUtf8Error,
[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 `source` is never read
[INFO] [stdout]   --> src/chunk.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         source: io::Error,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/chunk.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         source: ChunkTypeError,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `png`
[INFO] [stdout]    --> src/png.rs:356:13
[INFO] [stdout]     |
[INFO] [stdout] 356 |         let png = Png::try_from(&PNG_FILE[..]).unwrap();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_png`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_first_chunk` and `get_last_chunk` are never used
[INFO] [stdout]    --> src/png.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout]  45 | impl Png {
[INFO] [stdout]     | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 144 |     fn get_first_chunk(&self) -> Option<&Chunk> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     fn get_last_chunk(&self) -> Option<&Chunk> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_IHDR_chunk_must_remain` should have a snake case name
[INFO] [stdout]    --> src/png.rs:327:8
[INFO] [stdout]     |
[INFO] [stdout] 327 |     fn test_IHDR_chunk_must_remain() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_ihdr_chunk_must_remain`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_IEND_chunk_must_remain` should have a snake case name
[INFO] [stdout]    --> src/png.rs:337:8
[INFO] [stdout]     |
[INFO] [stdout] 337 |     fn test_IEND_chunk_must_remain() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_iend_chunk_must_remain`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/png.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         source: ChunkError,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `source` is never read
[INFO] [stdout]   --> src/png.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         source: io::Error,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_first_chunk` and `get_last_chunk` are never used
[INFO] [stdout]    --> src/png.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout]  45 | impl Png {
[INFO] [stdout]     | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 144 |     fn get_first_chunk(&self) -> Option<&Chunk> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     fn get_last_chunk(&self) -> Option<&Chunk> {
[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 11.61s
[INFO] running `Command { std: "docker" "inspect" "994f09e79d9ddb2164b619a6c18f88d1d357a2eae92be5aaf67c7d576a59f7de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "994f09e79d9ddb2164b619a6c18f88d1d357a2eae92be5aaf67c7d576a59f7de", kill_on_drop: false }`
[INFO] [stdout] 994f09e79d9ddb2164b619a6c18f88d1d357a2eae92be5aaf67c7d576a59f7de
