[INFO] cloning repository boustrophedon/png-concealer
[INFO] running `"git" "clone" "--bare" "git://github.com/boustrophedon/png-concealer.git" "work/cache/sources/gh/boustrophedon/png-concealer"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/boustrophedon/png-concealer'...
[INFO] running `"git" "clone" "work/cache/sources/gh/boustrophedon/png-concealer" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/boustrophedon/png-concealer"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/boustrophedon/png-concealer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/boustrophedon/png-concealer" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/boustrophedon/png-concealer"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/boustrophedon/png-concealer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3cf6cb856894fe5c0b47e76cd18ab52c235be237
[INFO] sha for GitHub repo boustrophedon/png-concealer: 3cf6cb856894fe5c0b47e76cd18ab52c235be237
[INFO] validating manifest of boustrophedon/png-concealer on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of boustrophedon/png-concealer on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing boustrophedon/png-concealer
[INFO] finished frobbing boustrophedon/png-concealer
[INFO] frobbed toml for boustrophedon/png-concealer written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/boustrophedon/png-concealer/Cargo.toml
[INFO] started frobbing boustrophedon/png-concealer
[INFO] finished frobbing boustrophedon/png-concealer
[INFO] frobbed toml for boustrophedon/png-concealer written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/boustrophedon/png-concealer/Cargo.toml
[INFO] crate boustrophedon/png-concealer has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking boustrophedon/png-concealer against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-1/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/boustrophedon/png-concealer:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1f66e73716c33cbd548d34d45b25da386eb9079ed44db27e9bc1f18964ca44a1
[INFO] running `"docker" "start" "-a" "1f66e73716c33cbd548d34d45b25da386eb9079ed44db27e9bc1f18964ca44a1"`
[INFO] [stderr]    Compiling structopt-derive v0.2.8
[INFO] [stderr]     Checking structopt v0.2.8
[INFO] [stderr]     Checking png-concealer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `input_png`
[INFO] [stderr]    --> src/main.rs:109:16
[INFO] [stderr]     |
[INFO] [stderr] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
[INFO] [stderr]     |                ^^^^^^^^^ help: consider prefixing with an underscore: `_input_png`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]    --> src/main.rs:109:36
[INFO] [stderr]     |
[INFO] [stderr] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
[INFO] [stderr]     |                                    ^^^^^^ help: consider prefixing with an underscore: `_output`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `max_length` should have an upper case name
[INFO] [stderr]   --> src/main.rs:51:11
[INFO] [stderr]    |
[INFO] [stderr] 51 |     const max_length: usize = (1<<31) - 1; // as defined in png spec
[INFO] [stderr]    |           ^^^^^^^^^^ help: convert the identifier to upper case: `MAX_LENGTH`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_upper_case_globals)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `input_png`
[INFO] [stderr]    --> src/main.rs:109:16
[INFO] [stderr]     |
[INFO] [stderr] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
[INFO] [stderr]     |                ^^^^^^^^^ help: consider prefixing with an underscore: `_input_png`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `output`
[INFO] [stderr]    --> src/main.rs:109:36
[INFO] [stderr]     |
[INFO] [stderr] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
[INFO] [stderr]     |                                    ^^^^^^ help: consider prefixing with an underscore: `_output`
[INFO] [stderr] 
[INFO] [stderr] warning: constant `max_length` should have an upper case name
[INFO] [stderr]   --> src/main.rs:51:11
[INFO] [stderr]    |
[INFO] [stderr] 51 |     const max_length: usize = (1<<31) - 1; // as defined in png spec
[INFO] [stderr]    |           ^^^^^^^^^^ help: convert the identifier to upper case: `MAX_LENGTH`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_upper_case_globals)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.32s
[INFO] running `"docker" "inspect" "1f66e73716c33cbd548d34d45b25da386eb9079ed44db27e9bc1f18964ca44a1"`
[INFO] running `"docker" "rm" "-f" "1f66e73716c33cbd548d34d45b25da386eb9079ed44db27e9bc1f18964ca44a1"`
[INFO] [stdout] 1f66e73716c33cbd548d34d45b25da386eb9079ed44db27e9bc1f18964ca44a1