[INFO] cloning repository SDRust/png-fabuloso
[INFO] running `"git" "clone" "--bare" "git://github.com/SDRust/png-fabuloso.git" "work/cache/sources/gh/SDRust/png-fabuloso"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/SDRust/png-fabuloso'...
[INFO] running `"git" "clone" "work/cache/sources/gh/SDRust/png-fabuloso" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/SDRust/png-fabuloso"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/SDRust/png-fabuloso'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/SDRust/png-fabuloso" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/SDRust/png-fabuloso"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/SDRust/png-fabuloso'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ea682ace17550d1cbad67b1c27f35f6811a6a83d
[INFO] sha for GitHub repo SDRust/png-fabuloso: ea682ace17550d1cbad67b1c27f35f6811a6a83d
[INFO] validating manifest of SDRust/png-fabuloso on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of SDRust/png-fabuloso on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing SDRust/png-fabuloso
[INFO] finished frobbing SDRust/png-fabuloso
[INFO] frobbed toml for SDRust/png-fabuloso written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/SDRust/png-fabuloso/Cargo.toml
[INFO] started frobbing SDRust/png-fabuloso
[INFO] finished frobbing SDRust/png-fabuloso
[INFO] frobbed toml for SDRust/png-fabuloso written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/SDRust/png-fabuloso/Cargo.toml
[INFO] crate SDRust/png-fabuloso already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking SDRust/png-fabuloso against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-4/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/SDRust/png-fabuloso:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ee3af37929ce1c2758642276299fe7e326e1939491f9c8eeb27176d2485af938
[INFO] running `"docker" "start" "-a" "ee3af37929ce1c2758642276299fe7e326e1939491f9c8eeb27176d2485af938"`
[INFO] [stderr]     Checking crc v1.3.0
[INFO] [stderr]     Checking pngstogram v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:86:13
[INFO] [stderr]    |
[INFO] [stderr] 86 |         let mut data_borrow : &mut [u8] = big_data_buf.borrow_mut();
[INFO] [stderr]    |             ----^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:86:13
[INFO] [stderr]    |
[INFO] [stderr] 86 |         let mut data_borrow : &mut [u8] = big_data_buf.borrow_mut();
[INFO] [stderr]    |             ----^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "ee3af37929ce1c2758642276299fe7e326e1939491f9c8eeb27176d2485af938"`
[INFO] running `"docker" "rm" "-f" "ee3af37929ce1c2758642276299fe7e326e1939491f9c8eeb27176d2485af938"`
[INFO] [stdout] ee3af37929ce1c2758642276299fe7e326e1939491f9c8eeb27176d2485af938