[INFO] crate hypercore 0.9.0 is already in cache
[INFO] extracting crate hypercore 0.9.0 into work/ex/pr-60466/sources/master#7840a0b753a065a41999f1fb6028f67d33e3fdd5/reg/hypercore/0.9.0
[INFO] extracting crate hypercore 0.9.0 into work/ex/pr-60466/sources/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853/reg/hypercore/0.9.0
[INFO] validating manifest of hypercore-0.9.0 on toolchain master#7840a0b753a065a41999f1fb6028f67d33e3fdd5
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+7840a0b753a065a41999f1fb6028f67d33e3fdd5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of hypercore-0.9.0 on toolchain try#6a9f0b6cc40687e25f9d772e3b10bab335c63853
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing hypercore-0.9.0
[INFO] finished frobbing hypercore-0.9.0
[INFO] frobbed toml for hypercore-0.9.0 written to work/ex/pr-60466/sources/master#7840a0b753a065a41999f1fb6028f67d33e3fdd5/reg/hypercore/0.9.0/Cargo.toml
[INFO] started frobbing hypercore-0.9.0
[INFO] finished frobbing hypercore-0.9.0
[INFO] frobbed toml for hypercore-0.9.0 written to work/ex/pr-60466/sources/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853/reg/hypercore/0.9.0/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+7840a0b753a065a41999f1fb6028f67d33e3fdd5-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+7840a0b753a065a41999f1fb6028f67d33e3fdd5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking hypercore-0.9.0 against try#6a9f0b6cc40687e25f9d772e3b10bab335c63853 for pr-60466
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60466/worker-1/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60466/sources/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853/reg/hypercore/0.9.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 98368da9594569ea3d8d4620cbeca19708c1bebc12a1118cb0c3a02266e8a02e
[INFO] running `"docker" "start" "-a" "98368da9594569ea3d8d4620cbeca19708c1bebc12a1118cb0c3a02266e8a02e"`
[INFO] [stderr]     Checking flat-tree v3.7.0
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]     Checking memory-pager v0.8.0
[INFO] [stderr]     Checking random-access-storage v0.6.0
[INFO] [stderr]     Checking pretty-hash v0.4.0
[INFO] [stderr]     Checking sleep-parser v0.7.0
[INFO] [stderr]     Checking random-access-memory v0.5.0
[INFO] [stderr]     Checking random-access-disk v0.6.0
[INFO] [stderr]     Checking merkle-tree-stream v0.8.0
[INFO] [stderr]     Checking sparse-bitfield v0.8.1
[INFO] [stderr]     Checking tree-index v0.5.0
[INFO] [stderr]     Checking quickcheck v0.7.2
[INFO] [stderr]    Compiling curve25519-dalek v0.20.0
[INFO] [stderr]     Checking ed25519-dalek v0.8.1
[INFO] [stderr]     Checking hypercore v0.9.0 (/opt/crater/workdir)
[INFO] [stderr] error: unused return value of `std::result::Result::<T, E>::is_err` that must be used
[INFO] [stderr]   --> src/crypto/key_pair.rs:48:3
[INFO] [stderr]    |
[INFO] [stderr] 48 |   verify(&keypair.public, b"oops", Some(&sig)).is_err();
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:5:24
[INFO] [stderr]    |
[INFO] [stderr] 5  | #![cfg_attr(test, deny(warnings))]
[INFO] [stderr]    |                        ^^^^^^^^
[INFO] [stderr]    = note: #[deny(unused_must_use)] implied by #[deny(warnings)]
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `hypercore`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "98368da9594569ea3d8d4620cbeca19708c1bebc12a1118cb0c3a02266e8a02e"`
[INFO] running `"docker" "rm" "-f" "98368da9594569ea3d8d4620cbeca19708c1bebc12a1118cb0c3a02266e8a02e"`
[INFO] [stdout] 98368da9594569ea3d8d4620cbeca19708c1bebc12a1118cb0c3a02266e8a02e