Dec 19 19:38:44.826 INFO checking boustrophedon/png-concealer against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:38:44.826 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:38:45.284 INFO [stdout] cd16fcd69f22fcf5473c1d69e916c12b000c19dcefab9a7ebc083ef2b9aa80d0
Dec 19 19:38:45.290 INFO running `"docker" "start" "-a" "cd16fcd69f22fcf5473c1d69e916c12b000c19dcefab9a7ebc083ef2b9aa80d0"`
Dec 19 19:38:47.746 INFO [stderr]    Compiling syn v0.13.10
Dec 19 19:38:56.156 INFO [stderr]    Compiling structopt-derive v0.2.8
Dec 19 19:38:59.484 INFO [stderr]     Checking structopt v0.2.8
Dec 19 19:38:59.944 INFO [stderr]     Checking png-concealer v0.1.0 (/opt/crater/workdir)
Dec 19 19:39:00.648 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 19:39:00.652 INFO [stderr]  --> src/main.rs:5:1
Dec 19 19:39:00.652 INFO [stderr]   |
Dec 19 19:39:00.652 INFO [stderr] 5 | #[macro_use]
Dec 19 19:39:00.652 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 19:39:00.652 INFO [stderr]   |
Dec 19 19:39:00.652 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 19:39:00.652 INFO [stderr] 
Dec 19 19:39:00.733 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 19:39:00.736 INFO [stderr]  --> src/main.rs:5:1
Dec 19 19:39:00.736 INFO [stderr]   |
Dec 19 19:39:00.736 INFO [stderr] 5 | #[macro_use]
Dec 19 19:39:00.736 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 19:39:00.736 INFO [stderr]   |
Dec 19 19:39:00.736 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 19:39:00.736 INFO [stderr] 
Dec 19 19:39:00.758 INFO [stderr] warning: unused variable: `input_png`
Dec 19 19:39:00.758 INFO [stderr]    --> src/main.rs:109:16
Dec 19 19:39:00.759 INFO [stderr]     |
Dec 19 19:39:00.759 INFO [stderr] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
Dec 19 19:39:00.759 INFO [stderr]     |                ^^^^^^^^^ help: consider using `_input_png` instead
Dec 19 19:39:00.760 INFO [stderr]     |
Dec 19 19:39:00.760 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 19:39:00.760 INFO [stderr] 
Dec 19 19:39:00.760 INFO [stderr] warning: unused variable: `output`
Dec 19 19:39:00.761 INFO [stderr]    --> src/main.rs:109:36
Dec 19 19:39:00.761 INFO [stderr]     |
Dec 19 19:39:00.761 INFO [stderr] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
Dec 19 19:39:00.762 INFO [stderr]     |                                    ^^^^^^ help: consider using `_output` instead
Dec 19 19:39:00.768 INFO [stderr] 
Dec 19 19:39:00.780 INFO [stderr] warning: constant `max_length` should have an upper case name such as `MAX_LENGTH`
Dec 19 19:39:00.780 INFO [stderr]   --> src/main.rs:51:5
Dec 19 19:39:00.780 INFO [stderr]    |
Dec 19 19:39:00.781 INFO [stderr] 51 |     const max_length: usize = (1<<31) - 1; // as defined in png spec
Dec 19 19:39:00.781 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:39:00.781 INFO [stderr]    |
Dec 19 19:39:00.782 INFO [stderr]    = note: #[warn(non_upper_case_globals)] on by default
Dec 19 19:39:00.782 INFO [stderr] 
Dec 19 19:39:00.944 INFO [stderr] warning: unused variable: `input_png`
Dec 19 19:39:00.944 INFO [stderr]    --> src/main.rs:109:16
Dec 19 19:39:00.944 INFO [stderr]     |
Dec 19 19:39:00.944 INFO [stderr] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
Dec 19 19:39:00.944 INFO [stderr]     |                ^^^^^^^^^ help: consider using `_input_png` instead
Dec 19 19:39:00.944 INFO [stderr]     |
Dec 19 19:39:00.944 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 19:39:00.944 INFO [stderr] 
Dec 19 19:39:00.944 INFO [stderr] warning: unused variable: `output`
Dec 19 19:39:00.944 INFO [stderr]    --> src/main.rs:109:36
Dec 19 19:39:00.944 INFO [stderr]     |
Dec 19 19:39:00.944 INFO [stderr] 109 | fn decode_file(input_png: PathBuf, output: PathBuf) {
Dec 19 19:39:00.944 INFO [stderr]     |                                    ^^^^^^ help: consider using `_output` instead
Dec 19 19:39:00.944 INFO [stderr] 
Dec 19 19:39:00.960 INFO [stderr] warning: constant `max_length` should have an upper case name such as `MAX_LENGTH`
Dec 19 19:39:00.960 INFO [stderr]   --> src/main.rs:51:5
Dec 19 19:39:00.960 INFO [stderr]    |
Dec 19 19:39:00.960 INFO [stderr] 51 |     const max_length: usize = (1<<31) - 1; // as defined in png spec
Dec 19 19:39:00.960 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:39:00.960 INFO [stderr]    |
Dec 19 19:39:00.960 INFO [stderr]    = note: #[warn(non_upper_case_globals)] on by default
Dec 19 19:39:00.960 INFO [stderr] 
Dec 19 19:39:00.996 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.39s
Dec 19 19:39:01.844 INFO running `"docker" "inspect" "cd16fcd69f22fcf5473c1d69e916c12b000c19dcefab9a7ebc083ef2b9aa80d0"`
Dec 19 19:39:02.048 INFO running `"docker" "rm" "-f" "cd16fcd69f22fcf5473c1d69e916c12b000c19dcefab9a7ebc083ef2b9aa80d0"`
Dec 19 19:39:02.336 INFO [stdout] cd16fcd69f22fcf5473c1d69e916c12b000c19dcefab9a7ebc083ef2b9aa80d0