[INFO] fetching crate hypercore 0.9.0...
[INFO] extracting crate hypercore 0.9.0 into work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/hypercore/0.9.0
[INFO] extracting crate hypercore 0.9.0 into work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/hypercore/0.9.0
[INFO] validating manifest of hypercore-0.9.0 on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of hypercore-0.9.0 on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-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-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/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-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/hypercore/0.9.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tree-index v0.5.0
[INFO] [stderr]   Downloaded random-access-memory v0.5.0
[INFO] [stderr]   Downloaded sleep-parser v0.7.0
[INFO] [stderr]   Downloaded pretty-hash v0.4.0
[INFO] [stderr]   Downloaded merkle-tree-stream v0.8.0
[INFO] [stderr]   Downloaded random-access-disk v0.6.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] testing hypercore-0.9.0 against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-2/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/hypercore/0.9.0:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] d293c63e91dcd81eda9d2fc718d30ed264a258dcf6085459580d0eb090566260
[INFO] running `"docker" "start" "-a" "d293c63e91dcd81eda9d2fc718d30ed264a258dcf6085459580d0eb090566260"`
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling merkle-tree-stream v0.8.0
[INFO] [stderr]    Compiling memory-pager v0.8.0
[INFO] [stderr]    Compiling random-access-storage v0.6.0
[INFO] [stderr]    Compiling sleep-parser v0.7.0
[INFO] [stderr]    Compiling pretty-hash v0.4.0
[INFO] [stderr]    Compiling random-access-disk v0.6.0
[INFO] [stderr]    Compiling random-access-memory v0.5.0
[INFO] [stderr]    Compiling curve25519-dalek v0.20.0
[INFO] [stderr]    Compiling sparse-bitfield v0.8.1
[INFO] [stderr]    Compiling tree-index v0.5.0
[INFO] [stderr]    Compiling ed25519-dalek v0.8.1
[INFO] [stderr]    Compiling hypercore v0.9.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.97s
[INFO] running `"docker" "inspect" "d293c63e91dcd81eda9d2fc718d30ed264a258dcf6085459580d0eb090566260"`
[INFO] running `"docker" "rm" "-f" "d293c63e91dcd81eda9d2fc718d30ed264a258dcf6085459580d0eb090566260"`
[INFO] [stdout] d293c63e91dcd81eda9d2fc718d30ed264a258dcf6085459580d0eb090566260
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-2/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/hypercore/0.9.0:/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" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] b6f90091fca3802b144786d2d6bb5e5ca85a210df7512a9cd7ed186f21dd4686
[INFO] running `"docker" "start" "-a" "b6f90091fca3802b144786d2d6bb5e5ca85a210df7512a9cd7ed186f21dd4686"`
[INFO] [stderr]    Compiling quickcheck v0.7.2
[INFO] [stderr]    Compiling hypercore v0.9.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_err` that must be used
[INFO] [stderr]   --> tests/regression.rs:15:3
[INFO] [stderr]    |
[INFO] [stderr] 15 |   feed.signature(0).is_err();
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[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] warning: use of deprecated item 'rand::Rng::choose': use SliceRandom::choose instead
[INFO] [stderr]   --> tests/model.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |     match g.choose(&choices).expect("Value should exist") {
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_err` that must be used
[INFO] [stderr]   --> tests/model.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |             insta.signature(len).is_err();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "b6f90091fca3802b144786d2d6bb5e5ca85a210df7512a9cd7ed186f21dd4686"`
[INFO] running `"docker" "rm" "-f" "b6f90091fca3802b144786d2d6bb5e5ca85a210df7512a9cd7ed186f21dd4686"`
[INFO] [stdout] b6f90091fca3802b144786d2d6bb5e5ca85a210df7512a9cd7ed186f21dd4686