[INFO] cloning repository jit-y/diff_json
[INFO] running `"git" "clone" "--bare" "git://github.com/jit-y/diff_json.git" "work/cache/sources/gh/jit-y/diff_json"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/jit-y/diff_json'...
[INFO] running `"git" "clone" "work/cache/sources/gh/jit-y/diff_json" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/jit-y/diff_json"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/jit-y/diff_json'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jit-y/diff_json" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/jit-y/diff_json"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/jit-y/diff_json'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 71764bdfc8d7f81964338b529e508948d93029d0
[INFO] sha for GitHub repo jit-y/diff_json: 71764bdfc8d7f81964338b529e508948d93029d0
[INFO] validating manifest of jit-y/diff_json 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 jit-y/diff_json 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 jit-y/diff_json
[INFO] finished frobbing jit-y/diff_json
[INFO] frobbed toml for jit-y/diff_json written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/jit-y/diff_json/Cargo.toml
[INFO] started frobbing jit-y/diff_json
[INFO] finished frobbing jit-y/diff_json
[INFO] frobbed toml for jit-y/diff_json written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/jit-y/diff_json/Cargo.toml
[INFO] crate jit-y/diff_json 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 jit-y/diff_json against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-1/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/jit-y/diff_json:/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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 332f259e3835e0e78104c3788b0f0d73d24a43456b1b0c1ded2d6c2f21508875
[INFO] running `"docker" "start" "-a" "332f259e3835e0e78104c3788b0f0d73d24a43456b1b0c1ded2d6c2f21508875"`
[INFO] [stderr]     Checking diff_json v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `JSONPrettier`
[INFO] [stderr]  --> src/prettier.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct JSONPrettier {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_pretty`
[INFO] [stderr]  --> src/prettier.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn to_pretty() {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `JSONPrettier`
[INFO] [stderr]  --> src/prettier.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct JSONPrettier {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_pretty`
[INFO] [stderr]  --> src/prettier.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn to_pretty() {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.64s
[INFO] running `"docker" "inspect" "332f259e3835e0e78104c3788b0f0d73d24a43456b1b0c1ded2d6c2f21508875"`
[INFO] running `"docker" "rm" "-f" "332f259e3835e0e78104c3788b0f0d73d24a43456b1b0c1ded2d6c2f21508875"`
[INFO] [stdout] 332f259e3835e0e78104c3788b0f0d73d24a43456b1b0c1ded2d6c2f21508875