[INFO] fetching crate ckb-merkle-mountain-range 0.17.0-pre...
[INFO] checking ckb-merkle-mountain-range-0.17.0-pre against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] extracting crate ckb-merkle-mountain-range 0.17.0-pre into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate ckb-merkle-mountain-range 0.17.0-pre on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ckb-merkle-mountain-range 0.17.0-pre
[INFO] finished tweaking crates.io crate ckb-merkle-mountain-range 0.17.0-pre
[INFO] tweaked toml for crates.io crate ckb-merkle-mountain-range 0.17.0-pre written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a9797761d19d0cb68c37f7f728b785f31c2bacc96dbde97543981b695e1deaa5
[INFO] running `"docker" "start" "-a" "a9797761d19d0cb68c37f7f728b785f31c2bacc96dbde97543981b695e1deaa5"`
[INFO] [stderr]     Checking faster-hex v0.3.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling blake2b-rs v0.1.5
[INFO] [stderr]     Checking ckb-merkle-mountain-range v0.17.0-pre (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr]     Checking proptest v0.9.4
[INFO] [stderr] error[E0432]: unresolved import `ckb_merkle_mountain_range::tests_util`
[INFO] [stderr]  --> benches/mmr_benchmark.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     tests_util::{MemStore, NumberHash},
[INFO] [stderr]   |     ^^^^^^^^^^ could not find `tests_util` in `ckb_merkle_mountain_range`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::TryFrom`
[INFO] [stderr]   --> benches/mmr_benchmark.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::convert::TryFrom;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `MMRStore`
[INFO] [stderr]  --> benches/mmr_benchmark.rs:8:15
[INFO] [stderr]   |
[INFO] [stderr] 8 |     MMRBatch, MMRStore, MMR,
[INFO] [stderr]   |               ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `ckb-merkle-mountain-range`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a9797761d19d0cb68c37f7f728b785f31c2bacc96dbde97543981b695e1deaa5"`
[INFO] running `"docker" "rm" "-f" "a9797761d19d0cb68c37f7f728b785f31c2bacc96dbde97543981b695e1deaa5"`
[INFO] [stdout] a9797761d19d0cb68c37f7f728b785f31c2bacc96dbde97543981b695e1deaa5