[INFO] updating cached repository jit-y/diff_json
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jit-y/diff_json
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jit-y/diff_json" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/jit-y/diff_json"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/jit-y/diff_json'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jit-y/diff_json" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/jit-y/diff_json"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jit-y/diff_json on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-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-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/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-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/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/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking jit-y/diff_json against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-6/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/jit-y/diff_json:/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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c5b81c8267466a6d85c802443981a29e70298f4b83016422e32ff6935c6275e4
[INFO] running `"docker" "start" "-a" "c5b81c8267466a6d85c802443981a29e70298f4b83016422e32ff6935c6275e4"`
[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 1.87s
[INFO] running `"docker" "inspect" "c5b81c8267466a6d85c802443981a29e70298f4b83016422e32ff6935c6275e4"`
[INFO] running `"docker" "rm" "-f" "c5b81c8267466a6d85c802443981a29e70298f4b83016422e32ff6935c6275e4"`
[INFO] [stdout] c5b81c8267466a6d85c802443981a29e70298f4b83016422e32ff6935c6275e4