[INFO] cloning repository https://github.com/xuyifangreeneyes/pngme
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xuyifangreeneyes/pngme" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxuyifangreeneyes%2Fpngme", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxuyifangreeneyes%2Fpngme'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5b20112570d7ab41684a493b2a708214b4d4c6f3
[INFO] checking xuyifangreeneyes/pngme against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxuyifangreeneyes%2Fpngme" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/xuyifangreeneyes/pngme
[INFO] finished tweaking git repo https://github.com/xuyifangreeneyes/pngme
[INFO] tweaked toml for git repo https://github.com/xuyifangreeneyes/pngme written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/xuyifangreeneyes/pngme on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/xuyifangreeneyes/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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0dcb1443f0cbcb0a4e156abcbe5d9e27f45edbd890e7c0f529351f331b53ea5a
[INFO] running `Command { std: "docker" "start" "-a" "0dcb1443f0cbcb0a4e156abcbe5d9e27f45edbd890e7c0f529351f331b53ea5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0dcb1443f0cbcb0a4e156abcbe5d9e27f45edbd890e7c0f529351f331b53ea5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dcb1443f0cbcb0a4e156abcbe5d9e27f45edbd890e7c0f529351f331b53ea5a", kill_on_drop: false }`
[INFO] [stdout] 0dcb1443f0cbcb0a4e156abcbe5d9e27f45edbd890e7c0f529351f331b53ea5a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b0a22603cbeadd96b6f37cc0b88a5fb926f3a161dd06b18e053273483edead1
[INFO] running `Command { std: "docker" "start" "-a" "5b0a22603cbeadd96b6f37cc0b88a5fb926f3a161dd06b18e053273483edead1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling anyhow v1.0.33
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling structopt-derive v0.4.13
[INFO] [stderr]     Checking structopt v0.3.20
[INFO] [stderr]     Checking pngme v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `length` and `crc` are never used
[INFO] [stdout]   --> src/chunk.rs:72:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl Chunk {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72 |     pub fn length(&self) -> u32 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 84 |     pub fn crc(&self) -> u32 {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `from_chunks`, `append_chunk`, and `header` are never used
[INFO] [stdout]   --> src/png.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl Png {
[INFO] [stdout]    | -------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn from_chunks(chunks: Vec<Chunk>) -> Png {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn append_chunk(&mut self, chunk: Chunk) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87 |     pub fn header(&self) -> &[u8; 8] {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub file_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/args.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub message: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub output_file: Option<PathBuf>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub file_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub file_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub file_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pngme` (bin "pngme") due to 6 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: method `header` is never used
[INFO] [stdout]   --> src/png.rs:87:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl Png {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87 |     pub fn header(&self) -> &[u8; 8] {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub file_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/args.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub message: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub output_file: Option<PathBuf>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub file_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub file_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/args.rs:44:5
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub file_path: PathBuf,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pngme` (bin "pngme" test) due to 6 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "5b0a22603cbeadd96b6f37cc0b88a5fb926f3a161dd06b18e053273483edead1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b0a22603cbeadd96b6f37cc0b88a5fb926f3a161dd06b18e053273483edead1", kill_on_drop: false }`
[INFO] [stdout] 5b0a22603cbeadd96b6f37cc0b88a5fb926f3a161dd06b18e053273483edead1
