[INFO] crate merkle_tree 0.1.0 is already in cache
[INFO] extracting crate merkle_tree 0.1.0 into work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/merkle_tree/0.1.0
[INFO] extracting crate merkle_tree 0.1.0 into work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/merkle_tree/0.1.0
[INFO] validating manifest of merkle_tree-0.1.0 on toolchain master#d99a320cba42f661aebfa1293b7b2ec3603dda75
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of merkle_tree-0.1.0 on toolchain try#e70472fc501b855c9080f3772432c10fe20b8866
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing merkle_tree-0.1.0
[INFO] finished frobbing merkle_tree-0.1.0
[INFO] frobbed toml for merkle_tree-0.1.0 written to work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/merkle_tree/0.1.0/Cargo.toml
[INFO] started frobbing merkle_tree-0.1.0
[INFO] finished frobbing merkle_tree-0.1.0
[INFO] frobbed toml for merkle_tree-0.1.0 written to work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/reg/merkle_tree/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking merkle_tree-0.1.0 against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/reg/merkle_tree/0.1.0:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a335ec01477a352809e4f79aaccb0d89fd7eeb84ca67d32a974d41a700b36dc8
[INFO] running `"docker" "start" "-a" "a335ec01477a352809e4f79aaccb0d89fd7eeb84ca67d32a974d41a700b36dc8"`
[INFO] [stderr]     Checking rayon v0.7.1
[INFO] [stderr]     Checking merkle_tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `self::crypto::sha2::Sha256`
[INFO] [stderr]   --> tests/bench_append.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     use self::crypto::sha2::Sha256;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::crypto::digest::Digest`
[INFO] [stderr]   --> tests/bench_append.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     use self::crypto::digest::Digest;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> tests/bench_build_tree.rs:518:30
[INFO] [stderr]     |
[INFO] [stderr] 518 |             (0..n).fold((), |a, b| {
[INFO] [stderr]     |                              ^ help: consider using `_a` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]    --> tests/bench_build_tree.rs:518:33
[INFO] [stderr]     |
[INFO] [stderr] 518 |             (0..n).fold((), |a, b| {
[INFO] [stderr]     |                                 ^ help: consider using `_b` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.01s
[INFO] running `"docker" "inspect" "a335ec01477a352809e4f79aaccb0d89fd7eeb84ca67d32a974d41a700b36dc8"`
[INFO] running `"docker" "rm" "-f" "a335ec01477a352809e4f79aaccb0d89fd7eeb84ca67d32a974d41a700b36dc8"`
[INFO] [stdout] a335ec01477a352809e4f79aaccb0d89fd7eeb84ca67d32a974d41a700b36dc8