Dec 18 14:02:59.963 INFO checking merkle-generator-0.2.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 14:02:59.963 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/merkle-generator/0.2.0:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 14:03:00.157 INFO [stdout] cbc86fb99cd4204004d58910abf857b3b1cdba71bb85074d0dd278aa95fef207
Dec 18 14:03:00.159 INFO running `"docker" "start" "-a" "cbc86fb99cd4204004d58910abf857b3b1cdba71bb85074d0dd278aa95fef207"`
Dec 18 14:03:00.840 INFO [stderr]     Checking flat-tree v1.1.0
Dec 18 14:03:00.842 INFO [stderr]    Compiling ring v0.9.7
Dec 18 14:03:05.503 INFO [stderr]     Checking merkle-generator v0.2.0 (/opt/crater/workdir)
Dec 18 14:03:05.946 INFO [stderr] warning: unused variable: `roots`
Dec 18 14:03:05.946 INFO [stderr]    --> src/lib.rs:142:26
Dec 18 14:03:05.946 INFO [stderr]     |
Dec 18 14:03:05.947 INFO [stderr] 142 |     fn leaf(leaf: &Node, roots: &Vec<Node>) -> Vec<u8> {
Dec 18 14:03:05.947 INFO [stderr]     |                          ^^^^^ help: consider using `_roots` instead
Dec 18 14:03:05.947 INFO [stderr]     |
Dec 18 14:03:05.947 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 18 14:03:05.947 INFO [stderr] 
Dec 18 14:03:06.073 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.32s
Dec 18 14:03:06.771 INFO running `"docker" "inspect" "cbc86fb99cd4204004d58910abf857b3b1cdba71bb85074d0dd278aa95fef207"`
Dec 18 14:03:06.904 INFO running `"docker" "rm" "-f" "cbc86fb99cd4204004d58910abf857b3b1cdba71bb85074d0dd278aa95fef207"`
Dec 18 14:03:07.025 INFO [stdout] cbc86fb99cd4204004d58910abf857b3b1cdba71bb85074d0dd278aa95fef207